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Method for preparing tert-butyl acetate from acetic acid and iso-butane

A technology of tert-butyl acetate and isobutane, which is applied in the field of preparing tert-butyl acetate, can solve the problems of low selectivity of tert-butyl acetate, many types of impurities, and high impurity content, and achieve cheap raw materials, easy availability of raw materials, and economical significant effect

Active Publication Date: 2016-03-02
HUNAN ZHONGCHUANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this method, there are many types of impurities in the reaction product, the impurity content is high, and the selectivity of tert-butyl acetate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The molar ratio of isobutane to acetic acid is 1:1, the oxidant is pure oxygen, the amount added is 40mol% of isobutane, and the catalyst is NHPI, HNO 3 , I 2 , the mixture of cobalt acetate, wherein, the amount of NHPI is 5mol% of isobutane, HNO 3 The amount of iodine is 5mol% of isobutane, the amount of iodine is 5mol% of isobutane, the amount of cobalt acetate is 0.01mol% of isobutane, the reaction temperature is 75 ° C, and the reaction pressure is 2.0MPa. After 8 hours of reaction, Sampling was carried out for analysis, the yield of tert-butyl acetate was 12.3%, and the selectivity was 90.2%.

Embodiment 2

[0039] The molar ratio of isobutane to acetic acid is 1:10, the oxidant is hydrogen peroxide, the addition amount is 200mol% of isobutane, and the catalyst is NHPI, HNO 3 , I 2 , the mixture of cobalt chloride, wherein, the amount of NHPI is 5mol% of isobutane, HNO 3 The amount of iodine is 10mol% of isobutane, the amount of iodine is 10mol% of isobutane, the amount of cobalt chloride is 0.1mol% of isobutane, the reaction temperature is 70 ° C, and the reaction pressure is 0.6MPa. After 2 hours of reaction , sampling was analyzed, the yield of tert-butyl acetate was 12.8%, and the selectivity was 90.5%.

Embodiment 3

[0041] The molar ratio of isobutane to acetic acid is 1:2, the oxidant is sodium peroxide, the addition amount is 80mol% of isobutane, and the catalyst is NHPI, NaNO 2 , I 2 , a mixture of cobalt bromide, wherein the amount of NHPI is 10mol% of isobutane, NaNO 2 The amount of iodine is 20mol% of isobutane, the amount of iodine is 20mol% of isobutane, the amount of cobalt bromide is 1.0mol% of isobutane, the reaction temperature is 60 ° C, and the reaction pressure is 1.8MPa. After 4 hours of reaction , sampling was analyzed, the yield of tert-butyl acetate was 17.9%, and the selectivity was 92.6%.

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PUM

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Abstract

The invention provides a method for preparing tert-butyl acetate from acetic acid and iso-butane. The method includes the steps that acetic acid and iso-butane are reacted in the presence of a catalyst and an oxidizing agent, and tert-butyl acetate is produced. The method for preparing tert-butyl acetate from acetic acid and iso-butane overcomes the defects of the prior art, raw materials are cheap and easy to get, energy consumption is low, the selectivity of tert-butyl acetate is high, and economic benefits are more remarkable.

Description

technical field [0001] The invention relates to a method for preparing tert-butyl acetate with acetic acid and isobutane. Background technique [0002] Tert-butyl acetate, also known as tert-butyl acetate, the English name is tert-butylacetate, referred to as TBAC, the molecular formula is CH 3 COOC (CH 3 ) 3 , and n-butyl acetate, sec-butyl acetate and isobutyl acetate are isomers. Tert-butyl acetate is a colorless liquid with a special aroma of esters, with a relative density of 0.90 (1 for water), a flash point of 40°C, and a boiling point of 97.8°C. It is insoluble in water, but soluble in most organic solvents such as ethanol, acetic acid and ether. The properties of tert-butyl acetate and other isomers are similar in most cases, so it can be used in many fields instead of n-butyl acetate. [0003] Tert-butyl acetate is a non-VOC (volatile organic compound), non-HAP (hazardous air pollutant) and low toxicity solvent, which has been widely used in Europe and America...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/035B01J31/04B01J31/30B01J31/28
Inventor 刘良会胡先念王坤
Owner HUNAN ZHONGCHUANG CHEM
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