Cyclohexene-based hexanediamine preparation process

A preparation process, cyclohexene technology, applied in the direction of reductive alkylation preparation, ozonolysis preparation, including molecular sieve catalysts, etc., can solve the problems of dependence on imports, high toxicity of adiponitrile, high price, etc., to achieve clean routes and improve Catalyst stability and selectivity improvement effect
CN111138295AActive Publication Date: 2020-05-12DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2020-05-12

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Abstract

The invention discloses a cyclohexene-based hexanediamine preparation process, which comprises: carrying out an oxidation reaction on a cyclohexene-containing mixed solution and an ozone-containing mixed gas under a reaction condition I to obtain adipic dialdehyde, wherein the reaction condition I comprises using a supported metal oxide as a catalyst I; and introducing the obtained adipic dialdehyde, ammonia gas and hydrogen into a reactor containing a catalyst II, and generating hexanediamine under reaction conditions, wherein the catalyst II is an alkaline molecular sieve supported metal catalyst. According to the invention, cyclohexene is used as a raw material, and hexanediamine is prepared through oxidation and amination, so that the use of highly toxic raw material adiponitrile is avoided; and ozone is used as an oxidizing agent, a heterogeneous catalyst can be used for high-selectivity preparation of adipic dialdehyde, an alkaline molecular sieve supported metal catalyst is further used, and the selectivity of the target product and the stability of the catalyst are effectively improved by using the confinement effect of the molecular sieve, so that the route is clean and environment-friendly.
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Description

technical field

[0001] The application relates to a preparation process of hexamethylenediamine based on cyclohexene, which belongs to the field of chemical industry. Background technique

[0002] The production technologies of hexamethylenediamine mainly include adiponitrile method, hexanediol method and caprolactam method. At present, almost all hexamethylenediamine is prepared by hydrogenation of adiponitrile, and the production methods of adiponitrile include catalytic amination of adipic acid, electrolytic dimerization of acrylonitrile and butadiene method.

[0003] Domestic adiponitrile is completely dependent on imports, and its price has remained high, seriously affecting the economic benefits and international market competitiveness of my country's nylon industry, and restricting the development of my country's nylon 66 and related industries. Therefore, the development of new technologies for the preparation of hexamethylenediamine has become an urgent problem in ...

Claims

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