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Synthesis method for ethylidene diacetate

A technology of ethylene diacetate and a synthesis method, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as complexity, achieve easy separation, cheap and easy-to-obtain raw materials, and process simple effect

Inactive Publication Date: 2015-12-16
山东联创产业发展集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Each of the above methods has advantages and disadvantages, but they are all too complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix acetic acid and vinyl acetate in a molar ratio of 3:1 at 80°C for 1h -1 , through the strong acid resin on the fixed bed, the pressure is 0.1MPa, and the liquid sampling analysis (correction value) comes out.

[0022] The content of ethylene diacetate is 16.47%, the content of vinyl acetate is 22.63%, the conversion rate of vinyl acetate is about 30%, and the selectivity is 100%.

Embodiment 2

[0024] Mix and feed acetic acid and vinyl acetate in a molar ratio of 2:1, at 25°C, 2h -1 , through the strong acid resin on the fixed bed, the pressure is 0.8MPa, and the liquid is sampled and analyzed.

[0025] The content of ethylene diacetate is 12.20%, the content of vinyl acetate is 25.20%, the conversion rate of vinyl acetate is about 22.20%, and the selectivity is 100%.

Embodiment 3

[0027] Mix and feed acetic acid and vinyl acetate in a molar ratio of 6:1, at 100°C for 3h -1 , through the strong acid resin on the fixed bed, the pressure is 2MPa, and the liquid is sampled and analyzed.

[0028] The content of ethylene diacetate is 17.60%, the content of vinyl acetate is 0.22%, the conversion rate of vinyl acetate is about 32.1%, and the selectivity is 100%.

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PUM

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Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthesis method for ethylidene diacetate. Solid acid is adopted as a catalyst to be contained on a fixing bed, acetic acid and vinyl acetate react through the fixing bed, and then the ethylidene diacetate is obtained. The synthesis method is scientific, reasonable and simple in technology, the ethylidene diacetate is easy to separate, and the raw materials are low in cost and easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a synthesis method of ethylene diacetate. Background technique [0002] Ethylene diacetate is a basic chemical raw material with a fruit-like aroma, a boiling point close to ethylene glycol diacetate, stable properties and low toxicity. Since the manufacturing cost is lower than ethylene glycol diacetate, it is possible to replace part of ethylene glycol diacetate as a solvent in coatings, paints, inks, etc., thus having a potential market background. [0003] The synthesis of ethylene diacetate began in 1950, most of which were directly synthesized by acetylene and acetic acid, see SE127190, US2462163, and the yield of ethylene diacetate was over 85%. [0004] Later, a method for synthesizing ethylene diacetate using glyoxal acetic anhydride as raw material was developed, see US5227517, US20110251422. [0005] Most reports use methyl acetate as raw materi...

Claims

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Application Information

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IPC IPC(8): C07C69/16C07C67/04
CPCC07C67/04C07C69/16
Inventor 李洪国孙强邵秀英
Owner 山东联创产业发展集团股份有限公司
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