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

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Problems solved by technology

But in this method, there are many types of impurities in the reaction produ...

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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