Method for preparing cyclohexanone oxime by ammoximation of cyclohexanone

A technology of cyclohexanone ammonia oxime and cyclohexanone oxime, which is applied in the field of preparation of cyclohexanone oxime by cyclohexanone ammonia oxime, can solve the problems of difficult control of reaction temperature, high equipment investment cost, large amount of waste water, etc., and achieve effective It is beneficial to large-scale industrial production, solves the separation problem, and increases the effect of filtering area
CN102584624AInactive Publication Date: 2012-07-18湖南兴鹏化工科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南兴鹏化工科技有限公司
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing cyclohexanone oxime by ammoximation of cyclohexanone. According to the method, 5.0-100 mu m of titanium silicalite molecular sieve is used as a catalyst, the reaction temperature is controlled by using an external circulation heating mode, and a reaction product and the titanium silicalite molecular sieve are separated in an external circulating filter. Compared with the prior art, the method has the advantages that the device investment is low, the separation problem between the catalyst and the reaction product can be better solved, the utilization rates of a molecular sieve and a reaction device can be improved, the reaction effect is better under the condition that the concentration of the catalyst is the same, the control is more stable, the overhauling of the device is easier, and the effective utilization rate of hydrogen peroxide can reach 90% or so.
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Description

technical field

[0001] The invention relates to a method for ammoximation of cyclohexanone, and more particularly relates to a method for preparing cyclohexanone oxime by ammoximation of cyclohexanone using titanium silicon molecular sieve as a catalyst. Background technique

[0002] Caprolactam is a monomer for the production of nylon 6, and is also an important chemical raw material, and the preparation step of cyclohexanone oxime by ammoximation of cyclohexanone is a key step in the production of caprolactam.

[0003] At present, there are three process routes for industrial production of caprolactam: one is the production route of cyclohexanone-hydroxylamine, including traditional Raschig process, DSM / HPO process, BASF-NO reduction process, Inventa-NO reduction process, Allied cumene / phenol process and Capropol process; the second is the cyclohexane photonitrosation process of Toray Corporation of Japan; the third is the toluene process of SNIA Company of Italy. [0004...

Claims

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