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Preparation method of ethyl acetate and/or isopropyl acetate

A technology of isopropyl acetate and ethyl acetate, which is applied in the field of preparation of ethyl acetate and/or isopropyl acetate, can solve the problems of waste of ethylene and propylene resources, avoid hot spots, suppress olefin stacking reactions, The effect of lowering the concentration

Inactive Publication Date: 2012-10-31
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of dilute ethylene utilization, although in the past four years, PetroChina, Sinopec, Sinochem Group's subsidiaries and private enterprises have used this part of resources to adopt the dry gas to ethylbenzene technology of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, a production capacity of 1.28Mt / a The production scale of ethylbenzene is equivalent to using 0.35Mt ethylene, which has achieved remarkable economic benefits, but the remaining part of ethylene and all propylene resources are still used as fuel, resulting in waste of ethylene and propylene resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] In each of the three reactors, 30g of silica loaded cesium phosphotungstate (Cs 2.5 h 0.5 PW 12 o 40 / SiO 2 ) catalyst, glacial acetic acid is continuously passed into the first reactor at a speed of 30g / h, and the dry gas is divided into three streams and enters the first, second and other three reactors at a speed of 5g / h, 5g / h, and 5g / h respectively , the total feed rate of dry gas is 15g / h, for C 2 ＝ +C 3 ＝ The total acid-to-ene molar ratio is 4.42, for C 2 ＝ +C 3 ＝ Total feed weight space velocity 0.11h -1 , the reaction is carried out at a reaction temperature of 150°C and a reaction pressure of 2.0MPa. After the reaction state is stable (it takes about 15 hours), online sampling and analysis is carried out through the six-way valve.

[0032] The operation results show that after the system stabilizes, the highest temperature of the reactor bed is: 155°C for the first reactor, 152°C for the second reactor, and 148°C for the third reactor. Calculated ...

example 2

[0034] In each of the three reactors, 30g of silica loaded cesium phosphotungstate (Cs 2.5 h 0.5 PW 12 o 40 / SiO 2 ) catalyst, glacial acetic acid is continuously passed into the first reactor at a speed of 30g / h, and the dry gas is divided into three streams and enters the first, second and other three reactors at a speed of 10g / h, 5g / h, and 5g / h respectively , the total feed rate of dry gas is 20g / h, for C 2 ＝ +C 3 ＝ The total acid-to-ene molar ratio is 3.31, for C 2 ＝ +C 3 ＝ The total feed weight space velocity is 0.15h -1 , the reaction is carried out at a reaction temperature of 150°C and a reaction pressure of 2.0MPa. After the reaction state is stable (it takes about 15 hours), online sampling and analysis is carried out through the six-way valve.

[0035] The operation results show that after the system is stabilized, the highest temperature of the reactor bed is: 157°C for the first reaction, 153°C for the second reaction, and 148°C for the third reaction...

example 3

[0037] In each of the three reactors, 30g of silica loaded cesium phosphotungstate (Cs 2.5 h 0.5 PW 12 o 40 / SiO 2 ) catalyst, glacial acetic acid is continuously passed into the first reactor at a speed of 30g / h, and the dry gas is divided into three streams and enters the first, second and other three reactors at a speed of 15g / h, 10g / h, and 5g / h respectively , the total feed rate of dry gas is 30g / h, for C 2 ＝ +C 3 ＝ The total acid-to-ene molar ratio is 2.21, for C 2 ＝ +C 3 ＝ The total feed weight space velocity is 0.22h -1 , the reaction is carried out at a reaction temperature of 170°C and a reaction pressure of 2.5MPa. After the reaction state is stable (it takes about 15 hours), online sampling and analysis is carried out through the six-way valve.

[0038] The operation results show that after the system stabilizes, the highest temperature of the reactor bed is: 173°C for the first reaction, 168°C for the second reaction, and 164°C for the third reaction. ...

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PUM

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Abstract

The invention provides a preparation method of ethyl acetate and / or isopropyl acetate. Catalytic dry gas from an oil refinery is used as a dilute ethylene and / or dilute propylene raw material and is introduced into a reaction system with a strong solid acidic catalyst to perform an addition esterification reaction so as to produce ethyl acetate and isopropyl acetate. The dry gas required by the method directly comes from a dry gas desulfurization treatment device of the refinery, the addition reaction pressure is low, continuous production of the ethyl acetate and isopropyl acetate can be realized by using dilute ethylene and / or dilute propylene, i.e., low-concentration ethylene and / or propylene, serving as raw material(s), the device investment is saved, the energy consumption is low, and the preparation method belongs to an advanced technology for new utilization of the catalytic dry gas.

Description

technical field [0001] The present invention relates to a kind of preparation method of ethyl acetate and / or isopropyl acetate, more precisely, it relates to a kind of preparation method of ethyl acetate with dilute ethylene and / or propylene and acetic acid as raw materials in the presence of solid acid catalyst and / or the isopropyl acetate method. technical background [0002] Ethyl acetate, also known as ethyl acetate, is one of the most widely used fatty acid esters. It has excellent solubility, is a fast-drying, excellent industrial solvent, and is also an important chemical raw material. It is widely used Used in the production of acetate fiber, ethyl fiber, chlorinated rubber, vinyl resin, acetate resin, synthetic rubber, etc.; also used in the production of liquid nitrocellulose ink for copiers; used as a cleaning agent in the textile industry; in the food industry It is used as a fragrance extractant for special modified alcohol; it is the most important fragrance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/04
Inventor 潘罗其袁红星颜刚余卫勋童莉刘芳曾光乐
Owner CHINA PETROCHEMICAL CORP
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