A kind of method for preparing hexamethylenediamine

A technology of hexamethylene diamine and adipaldehyde is applied in chemical instruments and methods, reductive alkylation preparation, physical/chemical process catalysts, etc. Improved selectivity, catalyst stability, and route cleaning effects
CN111116377BActive Publication Date: 2021-03-30DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-03-30

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Abstract

The present application discloses a method for preparing hexamethylenediamine, which comprises reacting raw materials containing adipaldehyde in the presence of ammonia, hydrogen and a catalyst to generate hexamethylenediamine, wherein the catalyst is HZSM-5 molecular sieve encapsulated transition metal catalyst. The method encapsulates the transition metal in the molecular sieve channel, catalyzes the reductive amination of adipaldehyde to prepare hexamethylenediamine, avoids the use of highly toxic raw material adiponitrile, and has a clean and environmentally friendly route.
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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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