How to Choose the Right Ethyl Acetate Supplier

Animportant chemical solvent, Ethyl Acetate finds application in a variety of industries, like, coatings, adhesives even inks and pharmaceuticals. In this regard choosing your supplier with prudence is paramount to guaranteeing high-quality products that adhere not only to safety standards but also regulatory demands. The following are some of the key factors you should consider when selecting an Ethyl Acetate supplier:

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Evaluate Quality Control & Certifications:

Ensure that potential suppliers maintain meticulous quality control procedures and test each batch, as the Ethyl Acetate production process may introduce impurities when not carefully controlled. Request data sheets documenting parameters such as purity levels, hydrocarbon residues, acidity and water content; these are crucial for your evaluation. ISO or similar certifications, which verify adherence to quality management standards, should be held by suppliers. Ensure you review safety data sheets and confirm that the product meets your application&#;s required specifications.

Assess Reliability & Customer Service:

You should make sure that you secure a supplier of Ethyl Acetate who not only delivers orders punctually but also exhibits exceptional overall customer service. Ascertain the lead times for your potential orders and establish protocols in the event of shipment delays. If possible, visit the supplier&#;s facility personally, this will allow you to assess their professionalism and capabilities directly. It is worth noting that reliable suppliers prioritize customer satisfaction; they firmly stand behind their products.

Review Costs & Fulfillment Capabilities:

When comparing suppliers of Ethyl Acetate, one should balance costs with product quality and reliability standards. You should request quotes for varying order volumes to assess pricing models and potential discounts. Additionally, it is crucial &#; ensuring cost-effectiveness &#; that the supplier can meet your required purchase quantities, align delivery frequency according to need, and offer suitable transportation modes. Do not, however, allow price alone to determine your choice; a product may be cheap, yet utterly pointless when its quality proves subpar.

Thorough diligence across a range of factors is necessary for selecting the ideal Ethyl Acetate supplier. Your investment in carefully evaluating prospective suppliers will yield high-quality products that enhance your industrial processes and applications; all this, while maintaining cost-effectiveness, safety and sustainability. Establishing a partnership with an ethical, customer-focused supplier, like Chemical Iran can potentially confer a competitive advantage upon you.

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The production technology of ethyl acetate

Technical field

The present invention relates to the production technologies of the production technology of ester type compound, especially ethyl acetate.

Background technology

Ethyl acetate is a kind of important organic solvent and chemical industry base stock, and China is mainly used in paint of coating, system Medicine field, paint adhesive, ink, cellulose, artificial essence's drug and organic acid production in, the market demand is increasing year by year Add.Reaction with ethyl alcohol and acetic synthesis ethyl acetate is reversible reaction, ethyl acetate, second alcohol and water can be formed four kinds of binary or Ternary azeotrope, and the boiling point of the boiling point of four kinds of azeotropic mixtures and pure ethyl acetate is very close to reaction product water need to be with azeotropic mixture Form distillated from tower top, and water content is less than 9% in azeotropic mixture and water and ethyl ester have certain dissolve each other, it is therefore desirable to a large amount of The water that ethyl ester reflux could generate reaction is from overhead extraction, so the vapor unit consumption of ethyl ester is generally higher than 2.5 ton/ton second Ester.In addition, traditional handicraft mostly uses concentrated sulfuric acid catalyst, equipment material is required high.

It is that ethyl alcohol and acetic acid exist in advance that Chinese patent CNU, which discloses a kind of technique producing ethyl acetate, Esterifying kettle reacts, and enters back into rectifying column, and reaction solution recycle feed mouth back flow reaction liquid is equipped on plate column to esterifying kettle, rectifying The ethyl acetate that process is generated using reaction is taken water out of promotion with the azeotropic mixture that water is formed and is reacted to positive direction progress.In tower top If cooler and phase-splitter, azeotropic mixture after cooling enters the ester phase partial reflux that phase-splitter layering will be enriched in and further takes out of instead The water that should be generated, the thick ester extraction in part further refine, and water phase enters recovery tower recycling ethyl alcohol and ethyl ester.The technique at least needs The latent heat of vaporization of three towers, raw material and water in products is maximum, and water is constantly taken out of from tower top and not only increases equipment investment and also increases Big energy consumption.Somebody proposes reactive distillation-extraction joint operation, and the thick ester of tower top output is entered extractor extraction, will be extracted As product, the smart ester reflux enhancing band outlet capacity in part makes the water that reaction generates remove system and beats for smart ester moiety extraction after taking Broken chemical reaction equilibrium.This technique continues up the thinking that water is removed to reaction system from tower top, and there is no fundamentally drop In low ethyl acetate production process the problem of high energy consumption.

Chinese patent CNA discloses a kind of method of water entrainer that is added in reactive distillation processes by water entrainer Tower reactor is added together with raw material, obtains thick ester in tower top, through the thick ester of saline solution purification by liquid extraction, the salting liquid after extraction needs subsequent heat It is recycled after concentration, cooling&#;Bottom of tower enters phase-splitter split-phase after condenser condenses, and the organic phase rich in water entrainer flows back To tower reactor, which recycles and is mixed into reactive distillation column with charging.The process, which introduces other component, not only makes reaction The complexity of distillation process change and the manipulating variable for increasing flow, increase operation difficulty.

Invention content

Technical problem to be solved by the present invention lies in provide a kind of production technology of ethyl acetate.

In order to solve the above technical problems, the technical scheme is that&#;

A kind of production technology of ethyl acetate, acetic acid are both reactant and extractant, and ethyl alcohol and acetic acid are in reactive distillation Counter current contacting in tower, make acetic acid and ethyl acetate/water, acetic acid and ethyl acetate/ethyl alcohol and acetic acid and ethyl acetate/ethyl alcohol/ It is come into full contact between the azeotropic mixture of water, reaction, separation, extraction process, overhead extraction alcohol content is completed in reactive distillation column The thick ester of 2.1-3.8%, tower reactor produce the water of acid content 0.1-0.7%.

The thick ester of above-mentioned gained refine and can be obtained high-purity ethyl acetate.

Preferably, the production technology of above-mentioned ethyl acetate, the ethyl alcohol and the acetic acid counter current contacting in reactive distillation column, (reactive distillation section) residence time 1.04-1.3hr (hour) in reactive distillation column, to complete the high conversion of reactant.

Preferably, the production technology of above-mentioned ethyl acetate, is as follows&#;

(1) acetic acid is added from the middle and upper part of reactive distillation column, and ethyl alcohol is added from the middle and lower part of reactive distillation column, ethyl alcohol and vinegar Acid counter current contacting in reactive distillation column completes reaction, separation, extraction under the action of acidic catalyst in reactive distillation column The process taken&#;Ethyl alcohol, which is reacted with acetic acid in the reactive distillation section of reactive distillation column, generates ethyl acetate and water, and acetic acid is in reaction essence Evaporate two-spot or ternary azeotrope that the extraction section extraction ethyl acetate of tower is formed with ethyl alcohol, water&#;The water generated in reaction process has 65%-99% is discharged from tower reactor, and the content of acetic acid is less than 0.7% in kettle material, and water content is obtained in reactive distillation top of tower The thick ethyl ester of 5-7.5%&#;

(2) thick ethyl ester enters ethyl ester treating column, and refined ethyl acetate is obtained in bottom of tower.

The purity that gained refines ethyl acetate is more than 99.95%.

Preferably, the production technology of above-mentioned ethyl acetate carries out atmospheric operation, reflux ratio 0.5- in the reactive distillation column 2.5,67-68.5 DEG C of top temperature, 92-96 DEG C of kettle temperature.

Preferably, the production technology of above-mentioned ethyl acetate, the reactive distillation column are plate column, and the column plate number of plies is 30-95 Layer.

Preferably, the production technology of above-mentioned ethyl acetate, the reactive distillation column are packed tower, packed height 10-50 Rice.

Preferably, the production technology of above-mentioned ethyl acetate, the ethyl ester treating column are plate columns, and the column plate number of plies is 15-80 Layer.

Preferably, the production technology of above-mentioned ethyl acetate, the ethyl ester treating column are packed tower, packed height 6-45 Rice.

Preferably, the production technology of above-mentioned ethyl acetate, the ethyl alcohol recovery tower are plate columns, and the column plate number of plies is 10-60 Layer.

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Preferably, the production technology of above-mentioned ethyl acetate, the ethyl alcohol recovery tower are packed tower, packed height 5-35 Rice.

Preferably, the production technology of above-mentioned ethyl acetate, is as follows&#;

(1) acetic acid is added from the middle and upper part of reactive distillation column, and ethyl alcohol is added from reactive distillation column middle and lower part, ethyl alcohol and acetic acid The counter current contacting in reactive distillation column completes the process of reaction, separation, extraction under the action of acidic catalyst in tower&#;

(2) ethyl acetate of purity 88.7-92.9% is continuously from reactive distillation column overhead extraction, by the reaction essence of tower top Evaporate partial reflux after tower condenser, part extraction to ethyl ester treating column&#;

(3) water that reaction generates enters ethyl alcohol recovery tower after being continuously discharged from the tower reactor of reactive distillation column, from reactive distillation The acetic acid content 0.1-0.7% of the material produced in the tower reactor of tower&#;

(4) the thick ester of tower top material of reactive distillation column, which is adopted to ethyl ester treating column, is refined, ethyl ester treating column top gaseous phase The partial reflux after the condensation of the ethyl ester treating column condenser of tower top, part are back to reactive distillation column after producing&#;

(5) ethyl ester treating column tower reactor obtains the ethyl acetate that purity is more than 99.95%&#;

(6) obtained ethyl alcohol, ethyl ester mixture are returned to reactive distillation column by ethyl alcohol recycling column overhead&#;

(7) ethyl alcohol recovery tower tower reactor extracted waste water.

Preferably, the production technology of above-mentioned ethyl acetate, the acidic catalyst are acid cation exchange resin, molecule Sieve, sulfuric acid, phosphoric acid, hydrochloric acid or ionic liquid.

The beneficial effects of the invention are as follows&#;

The production technology of above-mentioned ethyl acetate, acetic acid are both reactant and extractant, and acetic acid can be greatly reduced Vapor consumption in ethyl ester production process, and it is found that in prior art compared with traditional ethyl acetate production technology Used reaction kettle technique or reactive distillation tower process are all that tower reactor does not discharge, it is therefore an objective to be maintained kettle material highly concentrated The alcohol content in thick ester is controlled in the environment of degree acetic acid, then takes away the azeotropic mixture that ethyl acetate and water are formed from tower top removal React the water of production, it is well known that water content is low in the azeotropic mixture of ethyl ester and water, and the water for reacting production is more, it is therefore desirable to big Amount ethyl ester cycle could all take the water that reaction generates out of&#;And the 65%- that the production technology of the present invention exactly generates reaction 99% water removes reaction system from tower reactor, breaks the azeotropic mixture to be formed using the extraction of acetic acid, the water for reacting generation is big It is partially left at bottom of tower, the process of reaction, separation, extraction, rectifying is completed in a rectifying column, purity is refining to obtain and is more than 99.95% ethyl acetate.

Description of the drawings

Fig. 1 is the process flow chart of the production technology of ethyl acetate of the present invention.

In figure&#;T01- reactive distillation columns, T02- ethyl ester treating columns, T03- ethyl alcohol recovery towers,

E01- reactive distillation column condensers, E02- reactive distillation tower reboilers,

E03- ethyl ester treating column condensers, E04- ethyl esters refine tower reboiler,

E05- ethyl alcohol recovery tower condensers, E06- ethyl alcohol recycle tower reboiler

Specific implementation mode

Technical solution of the present invention is further described with reference to specific embodiment.

Embodiment 1

As shown in Figure 1, a kind of production technology of ethyl acetate, acetic acid is added from the middle and upper part of reactive distillation column T01, ethyl alcohol It is added from the middle and lower parts reactive distillation column T01, ethyl alcohol and the acetic acid counter current contacting in reactive distillation column T01, residence time 1.3hr To complete the high conversion of reactant, under the action of acidic catalyst acid cation exchange resin, in tower complete reaction, The process of separation, extraction, the reactive distillation column hypomere are equipped with 50 layers of catalytic distillation column plate, and epimere packed height is 12 meters, is returned Stream is than 1.1-1.5,67-68.5 DEG C of top temperature, 92-96 DEG C of kettle temperature.Top gaseous phase is after the reactive distillation column condenser E01 of tower top Partial reflux, part extraction to ethyl ester treating column T02&#;It reacts after the water generated is continuously produced from tower reactor and enters ethyl alcohol recovery tower T03&#;The thick ester of reactive distillation column T01 overhead extractions enters ethyl ester treating column T02 in the middle part of tower, and top gaseous phase passes through the second of tower top Partial reflux after the E03 condensations of ester treating column condenser, part extraction return to reactive distillation column T01&#;Ethyl ester treating column T02 tower reactors are adopted Go out the ethyl acetate of purity >=99.95%.

The discharging of reactive distillation column T01 tower reactors enters ethyl alcohol recovery tower T03, and ethyl alcohol recovery tower top gaseous phase ethyl alcohol, ethyl ester are mixed It closes object partial reflux, part extraction after the E05 condensations of ethyl alcohol recovery tower condenser and is back to reactive distillation column T01, ethyl alcohol returns It receives tower T03 tower reactors and waste water is discharged.

Reactive distillation tower reboiler E02, ethyl ester refine tower reboiler E04 and ethyl alcohol recycling tower reboiler E06 is all made of steaming Vapour heats, and provides heat to reactive distillation column, ethyl ester treating column and ethyl alcohol recovery tower respectively.

Embodiment 2

Certain factory produces tons of ethyl acetates per year, and using production technology described in embodiment 1, reactive distillation column material is 316L Acid-resistant stainless steel, ethyl ester is refined and ethyl alcohol recovery tower material is 304 stainless steels, and 70% product water is discharged from tower reactor, vinegar Acetoacetic ester purity 99.97%, steam consumption 1.4-1.8t/t- ethyl acetates produce ethyl acetate section per ton compared with the same industry Save 0.7-1.1t steam, energy saving 28-44%.

Embodiment 2

Certain factory produces tons of ethyl acetates per year, and using production technology described in embodiment 1, reactive distillation column material is 316L Acid-resistant stainless steel, ethyl ester is refined and ethyl alcohol recovery tower is 304 stainless steels, and 90% product water is discharged from tower reactor, acetic acid second Ester purity 99.99%, steam consumption 1.1-1.2t/t- ethyl acetates produce ethyl acetate per ton and save compared with the same industry 1.3-1.4t steam, energy saving to be more than 50%.

It can be seen that the production technology of ethyl acetate of the present invention continuously produces water from tower reactor, greatly reduce anti- Answer the energy consumption of distillation process&#;Additional addition water entrainer is not needed, object system complexity in tower is avoided, the energy saving technique is simple, behaviour It is easy to make process, controlled variable easily reaches tower inner equilibrium less&#;Break azeotropic mixture band using the extraction of acetic acid to be discharged, make Water rests on tower reactor, which not only reduces energy consumption and save equipment investment.

The above-mentioned detailed description carried out to the production technology of the ethyl acetate with reference to embodiment, is illustrative rather than limits Qualitatively, several embodiments, therefore the variation in the case where not departing from present general inventive concept can be enumerated according to limited range And modification, it should belong within protection scope of the present invention.

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