Ethyl acetate Ethanol related issues. Urgent!

There are a lot of problems after this thing is big, ethyl acetate and ethanol can be together, and friction may lead to combustion, but I feel that such a situation is rare.

Ethyl acetate is ethyl acetate Ignition 253

Ethanol flash point ( )12

Ignition temperature ( ) 363

**Upper Limit %(v v):

**Lower Limit %(v v):

Thermal insulation sealing.

No. Yes.

The esterification reaction of acetic acid and ethanol is CHCOOH + CHCHOH = = concentrated HSO heating == (reversible) CHCOOCHCH + HO.

Esterification reaction is a class of organic chemical reactions, mainly the reaction of alcohol and carboxylic acid or inorganic oxygenated acid to form ester and water. It is divided into three categories: carboxylic acid reaction with alcohol, inorganic oxygenated acid reaction with alcohol and inorganic strong acid reaction with alcohol. The esterification reaction of carboxylic acid and alcohol is reversible, and the reaction is generally very slow, so concentrated sulfuric acid is often used as a catalyst.

Polycarboxylic acids react with alcohols to form a variety of esters. The reaction of inorganic strong acids with alcohols is generally fast. A typical esterification reaction is the reaction of ethanol and acetic acid to produce ethyl acetate with aromatic odor, which is a raw material for the manufacture of dyes and medicines.

Esterification reaction is widely used in organic synthesis and other fields.

Reaction characteristics. It is a reversible reaction, under normal circumstances, the reaction is not carried out thoroughly, according to the principle of reaction equilibrium, in order to increase the yield of esters, it is necessary to separate a component from the product or make one of the reactants excessively carry out the reaction in the positive direction. The esterification reaction is a single-line, two-way reaction.

It belongs to the substitution reaction.

The reaction between acetic acid and ethanol is essentially acid dehydroxyl, and alcohol dehydrogenation produces water and ethyl acetate, which is called esterification reaction, and the reaction conversion rate is generally not very high.

Ethanol and acetic acid are catalyzed and heated by concentrated sulfuric acid to produce ethyl acetate, which is a substitution also known as esterification reaction. Finally, the device needs to connect a solution filled with saturated sodium carbonate to absorb ethanol, neutralize acetic acid, and reduce the solubility of ethyl acetate.

The esterification reaction of ethanol and acetic acid, which is the process in which ethanol and acetic acid molecules remove a molecule of water to form ethyl acetate. Sulfuric acid is often used as a catalyst and dehydrating agent. The specific dehydration sites are the carboxyl group of acetic acid and the hydroxyl group of ethanol.

1. What is the role of concentrated sulfuric acid? Concentrated sulfuric acid is used as both a catalyst and a water absorbent.

2. What is the function of adding broken porcelain tiles?

When preparing ethyl acetate, the reaction temperature should not be too high, and it should be kept at 60

When the temperature is too high, impurities such as ether and sulfurous acid will be produced. Once the liquid is heated to boiling, it should be heated over low heat instead. A few pieces of broken porcelain can be added to the tube beforehand to prevent the liquid from boiling.

3. What is the role of saturated sodium carbonate?

1) The solubility of ethyl acetate in inorganic salt Na2CO3 solution is reduced, and it is easy to be precipitated in layers.

2) Na2CO3 can react with volatile acetic acid to produce odorless sodium acetate, which is convenient for smelling the aroma of ethyl acetate.

4. Why can't the catheter reach into the saturated sodium carbonate?

Do not extend the trachea into the Na2CO3 solution to prevent the Na2CO3 solution from being sucked into the test tube where the reaction is heated due to uneven heating.

5. When ethanol, concentrated sulfuric acid and acetic acid are mixed, why do you add drugs slowly while shaking the test tube?

A mixture of ethanol and acetic acid is added first, and then concentrated sulfuric acid is slowly added, because concentrated sulfuric acid dissolved in ethanol will release a lot of heat.

6. What are the acids that can undergo esterification reaction?

Carboxylic acids and inorganic oxygenated acids such as ethyl nitrate:

ch3ch2oh+hno3---ch3ch2ono2+h2o

It's good to boil over a small fire, and you don't have to pursue it too much, because in middle school, in order for students to understand the use of concentrated sulfuric acid as a catalyst and absorbent, in fact, there will be a lot of side reactions, and you can use aluminum oxide or phosphorus pentoxide in real organic synthesis, so there are no such problems!

The esterification reaction of ethanol and acetic acid is a reaction catalyzed by acid Qingmeng, which can prepare ethyl acetate, which is detailed as follows:

1. Introduction:

1. Reaction mechanism: When the esterification reaction of acetic acid and ethanol occurs, an acidic catalyst needs to be added to promote the reaction. The most commonly used catalysts are strong acids such as concentrated sulfuric acid or hydrochloric acid. The mechanism of the reaction involves the acid-catalyzed condensation of carboxylic acids and alcohols to produce esters and water.

2. Influencing factors: There are many influencing factors of esterification reaction, including the concentration of acid catalyst, reaction temperature and reaction time, etc., and the molar ratio of acetic acid and ethanol will also have an impact on the effect of the reaction.

3. Process conditions: In the actual production process, the esterification reaction of ethyl acetate can adopt single-stage reaction or multi-stage reaction. Single-stage reactions are generally performed in batches, while multi-stage reactions are achieved by continuous flow.

Process conditions include reactor type, reaction time, reaction temperature, acid catalyst concentration, alkyd molar ratio, etc.

4. Industrial application: Ethyl acetate is a commonly used solvent and chemical intermediate. Its industrial applications are wide, including the preparation of plastics, resins, coatings, paints, fragrances, etc. In addition, ethyl acetate can also be used in dyes, coatings, rubber and other industries.

2. Precautions:

1. Pay attention to the use of solutions: there are many solutions that are very harmful to people's bodies, and many people should know that sulfuric acid is dehydrated, especially concentrated sulfuric acid, and the corrosive effect is extremely strong, so you must be careful when doing this kind of experiment.

2. Pay attention to the use of instruments: many instruments should also be used carefully, for example, the phenomenon of test tubes bursting often occurs, so the heated test tubes must be kept dry.

3. Toxic gas production: many experiments may produce chlorine and other volatile substances, so this experiment must be carried out under ventilation conditions.

4. Pay attention to the dosage: many experiments have strict requirements for the dosage of articles and solutions, and the error is within the allowable or allowable range, just like the analytical balance we used in the previous experiments.

ch cooh +ch ch oh== concentrated h so heating == (reversible) ch cooch ch + h o

In the presence of sufficient oxygen, acetobacterium bacteria are able to produce acetic acid from foods containing danye alcohol. Cider or wine is usually used mixed with grains, malt, rice, or potatoes that are mashed and fermented. Alcohol and acetic acid undergo esterification reaction under the action of concentrated sulfuric acid as a catalyst and absorbent to form ethyl acetate and water.

1.In the presence of acids or bases, esters undergo hydrolysis reactions with water.

Produce the corresponding acids or salts and alcohols.

2.Esters can also be hydrolyzed in the absence of acids or bases, but only at a very slow rate (as usual, ethyl acetate.

It takes 16 years to reach it.

to hydrolytic equilibrium).

So add enough ethanol.