Method for synthesizing diisobutylamine, catalyst and catalyst preparation method

A technology of diisobutylamine and catalyst is applied in the field of chemical industry to achieve the effects of high activity, reduction of preparation cost and process requirements, and reduction of roasting temperature requirements
CN113231064AActive Publication Date: 2021-08-10ZHEJIANG JIANYE CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG JIANYE CHEM
Publication Date
2021-08-10

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Abstract

The invention discloses a synthesis method of diisobutylamine, which has the advantages of high selectivity of diisobutylamine, low cost, high yield, safety and environmental friendliness. The invention also discloses a catalyst and a preparation method of the catalyst. The method comprises the following steps: vaporizing isobutanol and ammonia, carrying out an ammonification reaction in the presence of hydrogen through a fixed bed reactor filled with a Co catalyst, and carrying out distillation separation after the reaction to obtain synthetic diisobutylamine. According to the method, the reaction pressure is 0.5-3 MPa, the reaction temperature is 100-250 DEG C, the molar ratio of alcohol to ammonia to hydrogen is (1-5): 1: (2-4), and the alcohol feeding space velocity is 0.1-0.8 h <-1 >. The method for synthesizing diisobutylamine is high in conversion rate, high in selectivity, low in cost, good in safety and environment-friendly.
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Description

technical field

[0001] The invention relates to the technical field of chemical industry, in particular to a method for synthesizing an organic compound diisobutylamine, a catalyst and a method for preparing the catalyst. Background technique

[0002] Diisobutylamine is an important chemical intermediate for the synthesis of some pesticides and rubber accelerators, such as the pesticide butachlorate and the rubber accelerator diisobutylthiuram disulfide.

[0003] The traditional methods for preparing diisobutylamine are as follows: ①Using the reaction route of chloroisobutane and ammonia liquid phase, and then reducing the organic amine with a strong base. ② It is obtained by condensation hydrolysis of bromoisobutane and p-benzenesulfonamide, and neutralization with strong alkali. ③ Ammonification and hydrogenation of isobutyraldehyde, using noble metals as catalysts, and adjusting the ratio of ammonia to aldehyde can prepare different proportions of isobutylamine, diisobut...

Claims

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