How is ethyl ester produced? What is Ethyl Ester?

Production method of methyl acrylate and ethyl acrylate.

Application for patent number.

Date of filing of the patent.

Name: Production method of methyl acrylate and ethyl acrylate.

Public (announcement) No. CN1046327

Publication (announcement) day.

Category: Chemistry; Metallurgy.

Date of Certification. Priority.

Patent application (patent right) Beijing Dongfang Chemical Plant.

Address: Zhang Xinzhuang, Tongxian County, Beijing.

Inventor (designer) Fei Guangtai; Zhan Guoshan; Ma Hongquan.

International Applications. International Publication.

Date of entry into the country.

Patent ** Institution: Sanyou Patent Firm.

**People: Li Qiang; Zhu Liguang.

Summary. The present invention relates to the improvement of the existing methyl acrylate and ethyl acrylate production process, and in the current propylene acetylate methyl, ethyl ester production process, there is 0 7 1 acrylic acid discharged with wastewater, causing certain loss. The main point of the present invention is to change the composition of the reflux fluid entering the flash tower, thereby reducing or ** the acrylic acid brought out by the distillate at the top of the flash tower.

Adopt the present invention, the total acid amount in the measured wastewater can be reduced hundreds of times more, a set of production equipment with a capacity of 2000 kilograms, acrylic acid worth about 1.5 million yuan per year, and reduce tens of thousands of tons of wastewater, save hundreds of tons of steam, the economic benefits are very significant, also bring great convenience to the treatment of three wastes.

Sovereign items. A production method for methyl acrylate and ethyl acrylate comprises the following main steps: (1) acrylic acid and methanol or ethanol are subjected to a liquid-phase esterification reaction in a reactor 1; (2) the reaction liquid coming out of the reactor 1 enters the atmospheric pressure flash tower 2 and is heated through the reboiler 4; (3) the distillate containing methyl acrylate or ethyl acrylate, water, methanol or ethanol is distilled from the top of the flash tower 2 into the derecombinant cell 3 in the gas phase; (4) After the recombinant acrylic acid is removed, a part of the reaction generation solution that comes out from the top of the decombinant column 3 is sent to the extraction tower, and after extraction and distillation, high-purity methyl acrylate or ethyl acrylate is obtained, and a part is returned to the flash tower 2 as reflux solution.

The present invention is characterized in that the composition of the reflux entering the flash tower 2 is changed, and the concentration of methyl acrylate or ethyl acrylate is increased.

Acetic acid and ethanol react.

is a class ofEthanoland acid condensation esterification to obtain the product.

Usually ethyl ester refers to carboxylic acid.

Esters, the general formula is rcooet. Common ethyl esters are ethyl formate and ethyl acetate.

Wait. Relative density.

Water 1): , Boiling Point: , Melting Point, Flash Point 4, Ignition Point 295.

First aid measures**Remove contaminated clothing immediately after contact and rinse thoroughly with soapy and clean water**. Medical treatment. Immediately lift the eyelids on eye contact and rinse thoroughly with plenty of running water or saline for at least 15 minutes.

Medical treatment. Inhale quickly out of the scene to fresh air. Keep your airway open.

Unobstructed. Such as difficulty breathing.

Give oxygen. If breathing stops, artificial respiration is performed immediately. Medical treatment. Rinse your mouth with water and give milk or egg whites. Medical treatment.

Ethyl formate, also known as ethyl formate (ethyl formatate), molecular formula C3H6O2, colorless or yellowish transparent liquid, fruity fragrance. Soluble in water, miscible in most organic solvents, contraindicated oxidants, reducing agents, acids, alkalis.

Ethyl ester, also known as ethyl ester, is a class of products obtained by the condensation ester of ethanol and acid, usually ethyl ester refers to carboxylic esters, and the general formula is rcooet. Common ethyl esters are ethyl formate, ethyl acetate, etc. **Contact.

Immediately remove contaminated clothing and rinse thoroughly with soapy and clean water**. Medical treatment.

Eye contact. Lift the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Medical treatment.

Inhale. Quickly leave the scene and move to a place with fresh air. Keep your airways open. If you have difficulty breathing, give oxygen. If breathing stops, artificial respiration is performed immediately. Medical treatment.

Ingestion. Rinse your mouth with water and give milk or egg whites. Medical treatment.

Operational precautions.

Tightly sealed, providing adequate local ventilation and full ventilation. Operators must be specially trained and strictly follow operating procedures. It is recommended that the operator wear a self-priming filtering gas mask (half mask), wear chemical safety glasses, wear anti-poison penetration overalls, and wear rubber oil-resistant gloves.

Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent vapor leakage into the workplace air.

Avoid contact with oxidants and reducing agents. When handling, it is necessary to load and unload lightly to prevent damage to the packaging and containers. Equipped with corresponding varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment.

Empty containers may leave harmful substances behind.

Precautions for storage.

It is stored in a non-combustible warehouse with refrigeration equipment, good ventilation and good heat dissipation. Keep away from fire and heat sources. It should be stored separately from oxidant and reducing agent, and should not be mixed.

Explosion-proof lighting and ventilation facilities are adopted. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with emergency response equipment for spills and suitable containment materials.

Amount of 7 ml CH3COOH:

Amount of 10ml C2H5OH:

According to the 1:1 reaction, the theoretical yield is the amount in the acetic acid macro:

For example: acetic acid overdose. Calculated as butanol.

Glacial acetic acid density, butanol density.

So glacial acetic acid is: 9*

Budanparasol is: 12*

Suppose the yield of taman insolation x ml

Then the yield is: (x*.)

Ethyl ester is an organic compound that is also known as an ester. It is a product produced by the reaction of alcohols with acids. The structure of ethyl ester contains a carbonyl group (C=O) and an oxygen atom (O). This makes ethyl ester chemically different from other organic compounds.

Ethyl ester has a wide range of applications in life. It is used as a solvent in the industrial sector. Due to its low toxicity and volatility, ethyl ester can be used as a solvent in many coatings, adhesives, and cleaners.

Ethyl ester is also widely used in the pharmaceutical industry. Many pharmaceuticals and medical supplies require ethyl ester as a solvent or additive. Ethyl ester is also used in industries such as food, perfumes, and fragrances.

In addition to industrial applications, ethyl esters have some interesting properties. For example, ethyl ester can be used in the laboratory to create a balloon-shaped flame because ethyl ester burns quickly and produces a bright flame. Ethyl ester is also often used to make a variety of perfumes and fragrant products.

Ethyl ester is an organic compound with a wide range of applications. Ethyl ester plays an important role both in industrial production and in everyday life. It not only plays a role in the pharmaceutical, cosmetic, and food industries, but is also used in experiments and recreational activities.

Ethyl ester is an organic compound that is also known as ethyl acetate. It is formed by the reaction of acetic acid and ethanol. Ethyl ester has a fragrant odor and is commonly used in products such as fragrances, solvents, and coatings.

Ethyl ester also has a wide range of applications in chemical experiments, such as the preparation of other organic compounds. Ethyl ester can also be used to make materials such as rayon silk and plastics.

In addition to industrial applications, ethyl ester is also widely used in everyday life. For example, in the medical industry, ethyl ester is used to make pharmaceuticals and disinfectants; In the home, it can be used in cleaning products.

While ethyl ester has many benefits, it is important to note that it can also be a health hazard. Therefore, it is important to follow the relevant safety operating procedures when using ethyl esters.

Ethyl ester is a common organic compound that plays an important role in both production and life. We should fully understand its nature and application and follow safe operating procedures to use it.

Amount of 7 ml CH3COOH:

Amount of 10ml C2H5OH:

According to the 1:1 reaction, the theoretical yield is the amount in the acetic acid macro:

For example: acetic acid overdose. Calculated as butanol.

Glacial acetic acid density, butanol density.

So glacial acetic acid is: 9*

Budanparasol is: 12*

Suppose the yield of taman insolation x ml

Then the yield is: (x*.)

In the ethyl acetate synthesis experiment, the carbonization of the material is mainly caused by the high reaction temperature. Therefore, the carbonization of materials can be reduced by adopting appropriate heating methods, and the specific methods are as follows:

Water bath heating method: The reaction flask is placed in a water bath for heating, and the temperature of the water bath is generally controlled at about 50 60 to avoid direct heating of the flask. This method can evenly distribute the temperature and reduce the risk of carbonization of the material.

Avoid light state liter heating method: The ethyl acetate synthesis reaction is a photosensitive reaction, so direct sunlight and prolonged exposure to light should be avoided. The use of dark heating can reduce the possibility of carbonization of materials.

Slow heating method: When heating acetic acid and ethanol, the temperature should be raised slowly to avoid the carbonization of the material caused by a sudden increase in temperature. The reaction flask can be preheated at a low temperature and then slowly heated to the desired temperature, which can reduce the risk of carbonization.

Constant temperature heating method: using constant temperature water bath and other equipment for heating, can maintain a constant temperature, and avoid temperature fluctuations leading to carbonization of materials.

In summary, the carbonization of materials in ethyl acetate synthesis experiments can be reduced by heating methods such as water bath heating, dark heating, slow heating and constant temperature heating.

Reactant overload methods (e.g., ethanol overdose) are generally used to increase the yield of ethyl acetate.

Esterification is a reversible reaction. In order to increase the yield of esters, it is necessary to try to make the reaction as favorable as possible for ester formation. It is generally an excess of reactant acid and missing the manuscript alcohol.

In industrial production, what kind of excess is better, generally depends on whether the raw materials are easy to obtain, whether they are cheap and whether they are easy. In the laboratory, ethanol overdose is generally used. The mass fraction of ethanol should be high, and it would be better if absolute ethanol could be used instead of ethanol with a mass fraction of 95%.

In addition, the water generated by the reaction needs to be removed in time so that the reaction is conducive to the formation of ethyl acetate. The amount of concentrated sulfuric acid used in catalysis is very small, generally as long as the mass of sulfuric acid reaches 3% of the mass of ethanol to complete the catalytic effect, but in order to remove the water generated in the reaction, the amount of concentrated sulfuric acid should be slightly more.

Violate the law. Ethyl ester is a dangerous chemical, and its production, sales, transportation, and use must be approved by the public travel authority. Therefore, it is illegal to produce without permission.

The production of hazardous chemicals shall obtain a safety production license. The unauthorized production of hazardous chemicals shall be in accordance with Article 19 of the Regulations on Work Safety Permits: "In violation of the provisions of these Regulations, if the production is carried out without obtaining a safety production license, the production shall be ordered to stop, the illegal income shall be confiscated, and a fine of not less than 100,000 yuan but not more than 500,000 yuan shall be imposed."