Preparation method and application of N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine

A technology of trimethylcyclohexylamine and dimethyl, applied in the field of N, to achieve the effect of simple production process
CN102816072AActive Publication Date: 2012-12-12WANHUA CHEM GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2012-12-12

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Abstract

The invention provides a preparation method and application of N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine. The method comprises enabling 3, 3, 5-trimethyl cyclohexylamine, formaldehyde and hydrogen to undergo an amination hydrogenation reaction under a fixed temperature and pressure under the effect of a catalyst so as to prepare N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine. The obtained N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine can be used as a catalyst for polyurethane foaming after purification.
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Description

technical field

[0001] The invention relates to the utilization of by-product 3,3,5-trimethylcyclohexylamine in the production process of isophoronediamine (3-aminomethyl-3,5,5-trimethylcyclohexylamine). Specifically, it is a method for preparing N,N-dimethyl-3,3,5-trimethylcyclohexylamine from 3,3,5-trimethylcyclohexylamine, and involves N, Use of N-dimethyl-3,3,5-trimethylcyclohexylamine. Background technique

[0002] Isophorone diamine (3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to as IPDA, hereinafter no longer specified) is the preparation of isophorone diisocyanate (IPDI) (a kind of fat It can also be used as a curing agent for epoxy resins. Usually, 3-cyano-3,5,5-trimethylcyclohexanone (isophorone nitrile, referred to as IPN, hereinafter not specified), ammonia, and hydrogen are subjected to amination and hydrogenation under the action of a hydrogenation catalyst. And made.

[0003] During the manufacture of isophoronediamine, 3,3,5-trimethylcyclohexyl...

Claims

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