Method for producing adiponitrile

Abstract

The invention provides a method for producing adiponitrile. The method comprises the following steps: 1) carrying out a hydrogenation reaction on adipic acid to generate an intermediate product A, wherein the intermediate product A is one or more than two selected from the group consisting of 6-formyl-1-hexanoic acid, hexanediol, adipic dialdehyde and 6-hydroxy-1-hexanal; and 2) carrying out an ammoxidation reaction on the intermediate product A to generate adiponitrile. A raw material used in the method is adipic acid with excess capacity at present, so the conversion and value increase of the excess product are achieved, the urgent problem of insufficient adiponitrile capacity in China can be relieved, and great economic significance is achieved; and according to the method, highly toxicacrylonitrile in an acrylonitrile method can be avoided, the whole process is simple, operation is convenient, the degree of automation is high, and industrial popularization is facilitated.

Description

technical field

[0001] The invention belongs to the technical field of chemical product synthesis, and in particular relates to a method for producing adiponitrile. Background technique

[0002] Adiponitrile (ADN) is also known as 1,4-dicyanobutane, and its molecular formula is NC(CH 2 ) 4 CN, the addition of adiponitrile and hydrogen can produce hexamethylenediamine, and the reaction of hexamethylenediamine and adipic acid under strict material ratio produces nylon 66 salt. Using adiponitrile as an important intermediate for the synthesis of nylon 66 is the most important and most valuable industrial use developed by adiponitrile; research has found that hexamethylenediamine can synthesize 1,6-hexamethylene diisocyanate (HDI), which is It is another important use for the development of the downstream product chain of adiponitrile; with the rapid development of science and technology, the use of adiponitrile in light industry, electronics and other organic synthesis fields...

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