Monday, January 27, 2020

Ethyl Acetate Properties

Ethyl Acetate Properties Ethyl acetate is the most popular ester from ethanol and acetic acid. It is manufactured on a large scale for use as a solvent. Ethyl acetate is a moderately polar solvent that has the advantages of being volatile, relatively non-toxic, and non-hygroscopic. Ethyl Acetate is an organic compound which also known as, ethyl ethanoate, commonly abbreviated EtOAc or EA. Below is the table of Ethyl Acetate general data and physical properties: FORMULA CH3COOCH2CH3 MOLECULAR WEIGHT 88.10 MELTING POINT -83.6 °C BOILING POINT 77.15 °C INDEX OF REFRACTION nd20 1.372 DENSITY d20 0.902 g/mL SPECIFIC HEAT (20 °C) 0.459 kcal/kg. °C LATENT HEAT (bp) 88 kcal/kg VISCOSITY (20 °C) 0.455 cP EA SOLUBILITY IN WATER (20 °C) 7.7 wt.% WATER SOLUBILITY IN EA (20 °C) 3.3 wt.% Table 1.1 : Physical Properties of Ethyl Acetate Ethyl acetate can dissolve up to 3% water and has a solubility of 8% in water at room temperature. At elevated temperature its solubility in water is higher. It is unstable in the presence of strong aqueous bases and acids. Ethyl Acetate can be manufactured by several types of process such as esterification, Tishchenkos reaction and Advanced Acetates by Direct Addition (AVADA) technology. In 1985 it was approximately 400000 tones in tons were produced yearly in Japan, North America, and Europe combined. The commercial Ethyl Acetate is a clear, colorless, sweet smell odor and has a minimum purity of 99.8%, with water and ethanol not exceeding 0.03%. Historical Review of Ethylbenzene Processes Ethyl Acetate is primarily produced by direct esterification of ethyl alcohol (e.g ethanol) with acetic acid, a process which involves mixing acetic acid with excess of ethyl alcohol and adding a small amount of sulphuric acid. This mixture contains about 65% of ester (EA). Then the EA is separated and purified by distillation in order to achieve commercial specification. This process considers as exothermic and safe where the heat of reaction is -0.0114kJ/mol with no danger of decomposition. Other methods that often use in manufacturing ethyl acetate are based on Tishchenkos reaction. This reaction is by combining two equivalents of acetaldehyde in the presence of an alkoxide base as catalyst. This way is a commercial method of producing ethyl acetate. Due to the observation and experiment by Tishchenko, the result shown that the obtainable yield of ethyl acetate by adding aluminum ethoxide to acetaldehyde at -20oC is 61%. In addition, new and interesting process of manufacturing ethyl acetate is Advanced Acetates by Direct Addition (AVADA) technology. This reaction used the reaction of ethylene, acetic acid and water with the presence of heteropoly acid (HPA) catalyst. It then will undergo reaction at vapor phase before being fed into the separation section where the major product and by-product being separated. This process can produce ethyl acetate at 99% concentration. The Uses of Ethyl Acetate Ethyl acetate is used as solvent in a wide range application especially in industries. It is one of the most popular solvent that used in surface coating and thinners manufacture such as nitrocellulose lacquers, varnishes and thinners. It exhibits high dilution ratios with both aromatic and aliphatic diluents and is the least toxic of industrial organic solvents. Pharmaceuticals also required ethyl acetate as an extraction solvent for the concentration and purification of antibiotics. Manufacturing of various drugs also used ethyl acetate as an intermediate. High purity product can be used as a viscosity reducer for resins used in photoresist formulations in the electronics industry. Besides that, ethyl acetate acts as a solvent in the preparation of synthetic fruit essences, flavors and perfumes. On the other hand, the extensive amounts of ethyl acetate are used in the manufacture of flexible packaging and in the manufacture of polyester films and BOPP films. It is also used in the treatment of aluminium foils. Ethyl acetate is used as solvent to dissolve the resin, control the viscosity and modify the drying rate in inks for flexographic and rotogravure printing. Based on ICIS article that has been updated April 2008, the global demand is predicted to grow at 3-4%/year because of strong demand for surface coatings and as a replacement for restricted solvents. China and Southeast Asia are largest demand while Western Europe is developed markets. Southeast Asia and China are expected to become the most popular for ethyl acetate production and consumption. The Southeast Asian paints and coatings market is expected to grow at 5-6%/year. Japans Daicel Industries is converting an acetic acid plant in Otake, Hiroshima to produce ethyl acetate by using bio-ethanol as the raw material. It will have a capacity of 50,000 tonnes/year with production expected to start in spring 2009. The global demand growth for US is about 2%/year to 2009. According to ICIS Chemical Business (ICB), US demand increased from 88,500 tonnes in 2005 to 95,300 tonnes in 2009. Around 60% of ethyl acetate is consumed in US as a solvent in a variety of coating formulations. These coatings are used for wood furniture and fixtures, agricultural, construction and mining equipment, containers and closures, auto refinishing, and maintenance and marine applications. Around 20% of the ethyl acetate is used as solvent-based architectural coatings for both exterior and interior use. This sector has been growing at approximately 6%/year. However, in industrial coatings the usage of ethyl acetate is decline because of environmental constraints has largely been completed and future growth in the US is estimated to be a healthier 2.5%/year up to 2009. OEM (original equipment manufacturer) solvent-based coatings have been declining slowly in the US. The OEM sector, however, is the largest and represents 58% of ethyl acetates coatings use demand. The remaining sector, specialty coatings, which includes marine coatings, has held steady. The European market is reported to be balanced with big supply and steady demand. However, future demand is expected to be flat and or even contract slightly as consumption by local paints and inks sectors shrinks as production moves eastwards. In the UK, INEOS has acquired BPs ethyl acetate business including a 250,000 tonnes/year plant in Hull. Future consolidation is seen as possible in Europe as ethylene-based producers struggle to compete against more competitive ethanol-based production. Europe could also become more reliant on imports. PROCESS BACKGROUND Esterification Esterification is a chemical reaction process between alcohol and carboxylic acid in the presence of catalyst that formed ester. This mixture converts to ester about 65% at room temperature. The commonly concentrated sulphuric acid is acting as a esterification catalyst to enhance the reaction. The sulphuric acid removes water to help shift the equilibrium towards forming more ester product. Water is a by- product and must be removed in order to get the equilibrium in the desired direction. This process is a simple process, well known reaction, and moderately exothermic where the heat or reaction, H is -0.0114kJ/mol with no danger of decomposition reaction. The optimum temperature for this reaction is in the range of 363 K 400 K while the optimum pressure is in the range of 20 bar 40 bar. Ethanoic Acid + Ethanol Ethyl Acetate + Water CH3COOH + C2H5OH CH3C02C2H5 The reaction between acetic acid and ethanol to produce ethyl acetate in the presence of concentrated sulphuric acid. This process is released a few amount of heat to the surrounding and classified as exothermic reaction. This reaction is called a homogeneous liquid phase. Water is formed in the reaction is removed continuously to ensure maximum conversion of acetic acid. The catalyst can be heteregenous and homogeneous. There are two categories of catalyst that can be used in this reaction, mineral acid catalyst and para toluene sulphonic acid or ion exchange resins can serve as heterogenous catalyst. Process Description Ethanol and acetic acid together with crude ethyl acetate is fed into the reactor in the presence of concentrated sulphuric acid to produce ester and water. Then, the products are fed into the distillation column (DC1) to separate water and ester (ethyl acetate). The bottom product of DC1 is water and the overhead product is ethyl acetate. This part are taken by dehydration and azeotropic distillation of ethyl acetate and water. The overhead product is passed to the decanter to separate the organic phase and aquase phase. The upper layer known as organic phase while lower layer known as aqueous phase. partially of organic phase is fed into the reactor and another potion of organic phased is passed into the second distillation column (DC2). The second column is a purify process where to give the pure ethyl acetate (bottom product). The top product is a mixture that consists of ethyl acetate, water and ethanol. this mixture is separated after cooling process and the light phase is fed back to DC2 and the rest is transferred to the second decanter where its process is same as the first decanter to separate the organic and aqueous phase. Pipeline is used to combine the aqueous phase from the both decanters and distilled in the third column to give waste water at the bottom product and again ester, water and alcohol. This stream is recycled into the reaction column. Raw Material Ethanol: Ethanol is one of the material that is being used in the esterification process. it is also known as ethyl alcohol. ethanol is a volatile, flammable and colorless liquid. Ethanol can be obtain by fermentation of plants. Ethanol is relatively non-toxic and dissolve in water. It is a renewable energy source and it has less harmfull effects on the environment. However, ethanol will also give an impacts to the environment. The use of ethanol is a problem for conventional air pollutants. Ethanol used will increase the emission of chemicals that lead to the production of ozone. Ethanoic acid: One of the raw material needed to complete the reaction. Ethanoic Acid is one of the simplest carboxylic acid. it is a colourless liquid with an unpleasant pungent odour. ethanoic acid is produced by the oxidation of ethanol. Ethanoic acid is highly corrosive to the metals and it is also potentially harmful to our health. Sulphuric acid (catalyst): Sulphuric acid is chosed as homogeneous catalyst in this reaction. this catalyst is very effective mineral acid catalyst. however, this sulphuric acid is strongly corrosive and leaves sulfate residues. besides that, it is also generates large amount of heat. Tishchenkos Reaction Tishchenkos reaction is a reaction that need the presence of an alkoxide base while two equivalents of acetaldehyde is combining. This way is becoming commercial method of producing ethyl acetate in Europe since acetaldehyde become important intermediate on the basis of acetylene. Due to Tishchenko, the obtainable yield of ethyl acetate by adding aluminum ethoxide to acetaldehyde at -20 °C is 61%. The reaction is expressed by, [catalyst; alkoxide base (e.g Aluminum Ethoxide)] 2CH3CHO CH3COOCH2CH3 (Acetaldehyde) (Ethyl Acetate) Figure 1.3: Tishchenkos process Process Description For the process of Tishchenkos reaction, acetaldehydes will be introduced to the catalyst solution continuously. The catalyst is first need to be prepared by dissolving granular Aluminium in an ethanol-ethyl acetate mixture in the presence of aluminium chloride and small amount of zinc chloride. This catalyst (basicly Aluminum Ethoxide) is prepare uncontinuosly. In reactor, while acetaldehyde contact with the prepared catalyst, the ratio of the reaction partner must be adjust in order to obtain 98% transformation of acetaldehyde in one passage. A further 1.5% transformation is achieved in stirring vessels. Consecutively to make sure the reaction temperature is kept to 0 °C, brine with normally -20 °C will be used as the cooler. This reaction takes approximately 1 hour to completely mix before being transfer to residue separation. Next, separator is needed to remove the residue that contain in the mixture. The distillable products are removed by evaporation. For the economic issue, the residue is treated with water to regain ethanol. For the residual slurry, it can either be given to biological degradation plant or it can be burned together with other organic waste products. Subsequently, the distillable products need to be purifying in so that it can achieve commercial purity which is approximately 99.8%. Therefore, distillation column is used. For the 1st series of distillation column, light end are separated and this steam is further distilled to take non-converted acetaldehyde, which is returned to reactor. Then ethanol that contain ethyl acetate is separated for reuse in catalyst preparation. The bottom of 1st column give the high quality or grade of ethyl acetate that only will obtain at the head of the next column due to the need of separation of high boiling condensation products in mixture with ethyl acetate which will be remove at the bottom. In addition, further small column is needed to recover another part of pure ethyl acetate to isolate acetaldehyde diethyl acetal. Hence, after purification is done the recover product can used as an important intermediate or hydrolyzed in an acid medium to give reusable acetaldehyde and ethanol. Raw Material Acetaldehyde It is also known as ethanal. Acetaldehyde is one of the most important aldehyde and is being produced in a large scale industrially. This substance can be produced by the oxidation of ethylene. Although it is not a costly substance and it is very easy to get, acetaldehyde is a very toxic substance. It can give harm to living organisms and toxic substance is not an environmental friendly. It is an air pollutant resulting from combustion. Advanced Acetates By Direct Addition (Avada) In AVADA process, ethyl acetate is produced by reacting ethylene with acetic acid and water in the presence of heteropoly acid catalyst. The amount of water being used is in range from 1-10 mole% based on the total ethylene and acetic acid. The presence of water can reduce the amount of unwanted by-product that formed by the reaction. The mole ratio of ethylene to acetic acid in the feed stream is in range of 6.0 to 12.2, while for ethylene to water, the mole ratio is between 8.0 to 17.0 and the mole ratio of acetic acid to water is from 1.25 to 1.40. Heteropoly acid CH2 = CH2 + CH3C02H CH3C02CH2CH3 (ethylene) (acetic acid) Water (ethyl acetate) The reaction is preferably carried out at a temperature in the range from 160 °C to 195 °C while the preferably pressure is between 1200 kPa to 1500 kPa. The catalyst used must consist at least one heteropoly acid salt of a metal such as litium, cuprum, and magnesium which supported on a carrier. The heteropoly acid used is phosphotungstic acid while the carrier is silica. Heteropoly acids usually have a high molecular weight in the range of 700 8500 and include dimeric complexes. They have high solubility in polar solvents such as water or other oxygenated solvents. In order to achieve optimum performance, the carrier should free from metals or elements which can affect the catalytic activity of the system. To prepare the carrier, firstly the heteropoly acid is dissolved in distilled water, demineralised water, alcohols or other non-aqueous solution. Then the carrier is soaked in the acid solution for several hours with periodic manual stirring. After that it is filtered using Buchner funnel to remove any excess acid. The wet catalyst is then placed in an oven at elevated temperature for several hours to dry. Lastly it is allowed to cool to ambient temperature in desiccators. Now this supported catalyst is ready to be used in esterification process. BASIC FLOW DIAGRAM OF ETHYL ACETATE PRODUCTION BY AVADA The basic flow diagram of the unit is shown in the above figure. The unit consist of feed section, reaction section, and product and by-product separation section. The basic flow diagram of the unit is shown in the above figure. The unit consist of feed section, reaction section, and product and by-product separation section. The fresh feed which contain ethylene, acetic acid and water are fed into the vaporiser. Vaporiser is used to change the liquid phase feed into vapour phase as the reaction is preferably carried out in the vapour phase. It also includes a recycle system for both unreacted feeds and all the major by-products. The combined feed vapour stream is fed to a reactor train comprising of four fixed bed reactors in which each reactor already filled with catalyst. The reactants are passed over the catalyst suitably at a GHSV (Gas Hourly Space Velocity) of 300 to 2000 per hour. The first three reactors are fitted with acid/water injection to the exit streams. This is to facilitate independent control of reactor inlet temperatures and to maintain the desired ethylene to acid ratio. The fourth reactor functions as finishing reactor where the final conversion of ethylene and acetic acid to ethyl acetate is achieved. There are four by-product formed from the reaction which are 2-butanone, acetaldehyde, ethanol and diethyl ether. The crude product stream exiting the last reactor is cooled before entering the flash drum where the separation of non-condensable (gas) and condensable (liquid) phases occurs. The recovered gas is recycled back to the vaporiser while the liquid stream enters the product separation and purification system. In this system, series of distillation columns designed to recover and purify the final product. It is also to recover the unreacted acetic acid, water, ethanol and light ends streams for recycling back to the vaporiser. Advantages and Disadvantages of AVADA The AVADA process is superior to other additional processes in terms of environmental protection. This is because AVADA uses a solid acid catalyst. Therefore, there are fewer requirements for the treatment and disposal of aqueous effluent compared to traditional esterification reaction that produces as much water as ethyl acetate. Since AVADA process eliminates the intermediate esterification steps and the need for ethanol, it save about 20% on energy cost compare to conventional routes. The AVADA process produces high purity (more than 99%) which reduces the production of by-products. Undesirable by products such as 2-butanone and acetaldehyde may be controlled by careful adjustment of feed composition and reaction temperatures while maintaining acceptable ethyl acetate yields. The production of c4 unsaturated hydrocarbons is significantly reduced. Therefore, the catalyst lifetime can be extended. The disadvantages of AVADA process is rapid catalyst deactivation thus disturbing the quality of the product. However, this problem can be solved using a bed porous silica beads with the heteropolyacid impregnated in the pores. PROCESS SELECTION There are three methods found in the production of ethyl acetate which are Tishchenko, Esterification and Advanced Acetates by Direct Addition (AVADA). By considering all of the advantages and disadvantages of each process, the Acetates by Direct Addition (AVADA) was chosen as the best alternative to produce ethyl acetate. The main reason AVADA was chosen are because the catalyst used is environmental friendly. TICHSHENKOS ESTERIFICATION ADVANCED ACETATE BY DIRECT ADDICTION (AVADA) RAW MATERIAL Acetaldehyde Ethanol Acetic acid Ethylene Acetic acid Water CATALYST Alkoxide base (e.g aluminium ethoxide) Produced large amount of aluminium residue which is not easily separated Produce large amount of wastewater Acid catalyst (e.g Sulphuric acid) Very corrosive Produce sulphate residue Heteropolyacid (e.g phosphotungstic acid) The catalyst lifetime can be extended Using solid catalyst- waste free and less requirement for treatment OPERATING CONDITION 0 °C 1 hour reaction 90 0C 127 °C 20 bar 40 bar 160 °C 195 °C 1200 kPa 1500kPa PURITY Crude ethyl 61 % purity Crude ethyl 55 % purity Crude ethyl 99 % purity NUMBER OF EQUIPMENT USE 5 equipments ( distillation column, feed surge drum, reactor, separator, mixer) 3 equipments (reactor , decanter, distillation column) 5 equipments (vaporizer, reactor, flash drum, distillation column, compressor) REACTION 2Acetaldehyde Ethyl Acetate ethanol + ethanoic acid ethyl acetate Ethylene + acetic acid Ethyl acetate AVAILABILITY OF RAW MATERIAL Produce in large scale in Europe due to the importance of acetaldehyde as intermediate on the basis ofacetylene Easy to get in china Table 1.2: Comparison between all processes PROCESS ADVANTAGES DISADVANTAGES AVADA (Advanced Acetates By Direct Addition) Undesirable by products such as 2-butanone and acetaldehyde may be controlled by careful adjustment of feed composition and reaction temperatures while maintaining acceptable ethyl acetate yields. The production of c4unsaturated hydrocarbons is significantly reduced. The catalyst lifetime may be significantly extended. The process economics are improved by a reduced requirement to operate process purge streams to reduce the recycle of undesirable by-products and by the ability to de-bottleneck the product purification system. Very high purity (>99%). Avoid environmental hazards by using heteropolyacids (environmentally friendly). More energy efficiency save ~20% on energy costs. Using solid catalyst waste free and less requirement for treatment and disposal of aqueous effluent. Rapid catalyst deactivation thus disturbing the quality of the product. Esterification Well known reaction. Moderately exothermic reactions with no danger of decomposition of reactions. The reaction also exhibit second order ractions when no strong acid is present and a kind of autocatalytic behaviour when the acid is introducespurification system. Acidic feedstocks Concentrated sulphuric acid is a harmful chemical reagent. Generates large amount of heat. Tishchenkos Reaction The raw materials are produced in large quantities. The price of the raw material is not very costly. It is an alternative way due to expensive price of ethanol. Produce large amount of aluminium residue which is not easily separated due to the use of aluminium ethoxide as a catalyst . The use of the catalyst can create a large amount of wastewaters and thus extra cost is needed to treat the waste. The raw material, acetaldehyde is a very toxic substance. Table 1.3 : Advantages and disadvantages of each processes

Sunday, January 19, 2020

Sumptuous Cuisine Catering

Their plans for the ballroom show they want to offer their clients the option of having a meeting or party place outside of their business or home. They can give them many different options to fill their needs and wishes for their events. The company will provide many options for in house services and then will use subcontractors for the rest. Even though this is a ballroom they will be able to offer meetings or parties from small to large at any time of the day.This can be done due to their flexible menus they will be able to offer a variety of cuisine. This option will also put them above the competition that specializes In only one type of food. To keep this edge however they will have to keep up on new trends and watch their competition closely making sure that they stay one step ahead. The plans for this venture will reach out to a variety of past clients as well as open up a new market for them that will allow the client to not have to provide a place have their event.Reaching for the non-profit organizations that could utilize the location for their fund gassing functions will open more doors for people that go to them generally throw large functions or parties of their own. They are Joining forces with other companies that will allow them to expand their bookings through other party planning companies. This along with their plan to add their own sales staff should give the company a well rounded market. The sales forecast for the ballroom they are looking for it to rise considerable in the first year as the forecast Is for them to be able to sell due to Introductory specials.It is an aggressive one that could be hard to make If they cannot rent the space as they have projected. They have a well thought out Male Stone plan that seems to touch each section of getting the business going. The partners will be hands on with the start up to follow each function so that they can put their vision into place. With them doing this and hiring a minimal managerial staff until things take off this will help with costs. The hiring of an administrative assistant will give them the option to focus on this. A Marketing director will get them in place to be seen.Using a full time facilities manager will keep the building in check for the events. A chief and assistant cook will be added along with other cross trained staff. When looking at the capital that the company will have for startup it they seem to have a very tight budget and are allowing for the purchase, improvements, equipment and marketing however they do not have much to fall back on if things slow down the opening or business does not pick up right away. They do however plan to use the cash reserves from Sumptuous Cuisine to help In the first year.

Saturday, January 11, 2020

Is Price the Only Factor That Determines a Buyer’s Decision Essay

When consuming products and services, customers pay attention to several factors to make sure that they have made a sensible decision. Perhaps, the very first thing to be taken into account, under some circumstances, is price. However, it should not always be the sole consideration for purchasing decisions. From my point of view, apart from price, there are other determinants that can have a strong impact on a buyer’s decision, namely quality, buyer psychology and commitments that a firm offers its customers. To begin with, it can be said for sure that for most wise consumers, the quality of products or services is remembered long whereas the price is soon forgotten. When people make up their mind to consume something, they definitely want it to be worthy of their money. To be more specific, they are willing to have their ideal products although their prices can, sometimes, be very costly simply because of their durability. Long-lasting products are preferable, especially for careful consumers who are always in pursuit of the stability of the products. From another context, in terms of buyer psychology, many customers are not afraid of high cost to own certain products since not only do the products serve their needs, but they also help them to express their fashion-consciousness and status. For example, fashionable clothes enjoy increasing demand from celebrities every year though the producers set high prices. In addition, pricing low does not always work, even it can be counter-productive because consumers may assume that the products are below normal standards or the firm is going bankruptcy, which may lead to the damage of the company’s image and prestige. Last but not least, commitments to customers that a producer makes are also of great importance. These commitments usually come along with guarantees or after-sales services. Customers may pay higher amount of money for the products, however, in exchange, they are certain that they can have substitutes or indemnities when problems associated with the products happen. In other word, regardless of high prices, consumers are satisfied because they are offered certainty. In these cases, prices are also not the matter. In general, price is a significant factor that affects buyer decisions, but it is not the only determinants. Wise customers always seek for perfection from the products or services; hence, price should only be one of the aspects to be considered.

Thursday, January 2, 2020

The Development of Greek Architecture - 1098 Words

Construction of buildings for different purposes has been around through out the entire history of human existence. It was simply essential for survival. It used to be like that in the beginning, but then it took a little bit different aspect. It evolved from very simple and primitive shelters of cavemen to very elegant and big scale buildings constructed by various nations. Each one of them tried to invent something new and tried to advance forward already known building principles. Many of them have succeeded to certain extent, but the Greeks made the greatest impact with introduction of the famous Ionic, Doric and Corinthian styles. The Ionic style is thinner and more elegant. Its capital is decorated with a†¦show more content†¦The spaces between the triglyphs are the metopes. They may be left plain, or they may be carved in low relief. Because the metopes are somewhat flexible in their proportions, the modular space between columns can be adjusted by the architect. Often the last two columns were set slightly closer together, to give a subtle visual strengthening to the corners. Early examples of the Doric order include the temples at Paestum, in southern Italy. The Corinthian order is one of the Classical orders of Greek and Roman architecture, although it was seldom used in Greek architecture. The Corinthian order was said to have been invented by an architect, Callimachus, who was inspired by the sight of a votive basket that had been left on the grave of a young girl. A few of her toys were in it, and a square tile had been placed over the basket, to protect them fr om the weather. An acanthus plant had grown through the woven basket, mixing its spiny, deeply cut leaves with the weave of the basket. A Corinthian capital may be seen as an enriched development of the Ionic capital, though one may have to look closely at a Corinthian capital to see the Ionic volutes at the corners, perhaps reduced in size and importance, scrolling out above the two ranks of leaves, and the smaller volutes scrolling inwards to meet each other on each side. TheShow MoreRelatedAncient Greek And Romes Impact On Western Literature1642 Words   |  7 Pages The impact greek and roman culture had on western civilization The ancient Greeks and Romans were two of the greatest civilizations of the ancient world. The two civilizations thrived in their ancient environments which eventually led to a large amount of wealth within these two cultures. It is because of this that these ancient cultures were able to make a variety of advancements in literature, architecture, art and many other fields. 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