Method for preparing hexamethylenediamine

A technology of hexamethylenediamine and adipaldehyde, which is applied in reductive alkylation preparation, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problems of dependence on imports, high toxicity of adiponitrile, high price, etc., and achieves a clean route, The effect of improving selectivity and catalyst stability
CN111116377AActive Publication Date: 2020-05-08DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2020-05-08

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Abstract

The invention discloses a method for preparing hexamethylenediamine, which comprises the step of reacting a raw material containing adipic dialdehyde in the presence of ammonia gas, hydrogen and a catalyst to generate the hexamethylenediamine, and the catalyst is an HZSM-5 molecular sieve encapsulated transition metal catalyst. According to the method, the hexamethylenediamine is prepared throughcatalytic reductive amination of the adipic dialdehyde by encapsulating a transition metal in pore channels of a molecular sieve, so that the use of a highly toxic raw material adiponitrile is avoided, and the route is clean and environment-friendly.
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Description

technical field

[0001] The application relates to a method for preparing hexamethylenediamine from adipaldehyde, which belongs to the field of chemistry and chemical engineering. 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] The production of hexamethylenediamine is mainly monopolized by some large multinational companies. INVISTA, BASF and Ascend together account for 74% of the global production capacity, and are in a highly oligopoly industry. China Shenma, which ranks fourth, accounts for 9% of the global production capacity . The only manufacturers in my country that can produce hexamethylenediamine are PetroCh...

Claims

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