A kind of cyclohexene selective oxidation prepares 1,6-hexanedialdehyde method

Abstract

The invention discloses a method for preparing 1,6-adipaldehyde by selective oxidation of cyclohexene. The catalyst is a cobalt complex of isosteviol derivatives. The method comprises the following steps: adding solvent, cyclohexene, Catalyst, co-catalyst, feed oxygen, keep the pressure of the reactor at 0.2~0.6MPa, the reaction temperature at 120~170°C, and the reaction time at 60~300 minutes to obtain 1,6-adipaldehyde. Compared with the existing method, the present invention, the free radical produced by the decomposition of tert-butanol peroxide reacts with oxygen to generate oxygen free radical, and the cobalt complex of the catalyst isosteviol derivative interacts with the double bond in cyclohexene It has higher reactivity, and the activated double bond reacts with oxygen free radicals to generate 1,6-adipaldehyde; the invention is environmentally friendly, and has good selectivity and high yield of 1,6-adipaldehyde.

Description

technical field

[0001] The invention belongs to the field of chemical material intermediates, and in particular relates to a method for preparing 1,6-hexanedial by selective oxidation of cyclohexene. Background technique

[0002] 1,6-Adipaldehyde is an important fine chemical product. 1,6-Adipaldehyde has a good leather tanning effect and is widely used in the leather industry; 1,6-Adipaldehyde is also a quick-acting broad-spectrum chemical sterilizer, and does not corrode metal appliances, glass and plastic products, and is used in Disinfection and sterilization of medical equipment, food utensils, etc. 1,6-Hexandial can be obtained from cyclohexene by ozone oxidation followed by reductive hydrolysis, or directly obtained by ozone oxidation in acetic acid in the presence of tetracyanoethylene. However, a large amount of toxic substances are used in large-scale industrial production, which seriously pollutes the environment. Therefore, it is necessary to develop a new gree...

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