Procedure of producing cyclohexanone-oxime by preparation of hydrogen peroxide by combined anthraquinone process

Abstract

A combined process for preparing cyclohexanone oxime from H2O2 prepared by anthraquinone method includes the step for preparing H2O2 by anthraquinone method including hydrogenation of anthraquinone solution, oxidizing and extracting, and the step for preparing cyclohexanone oxime through ammoxidization of cyclohexanone, separating unreacted NH3, cyclic use of it, and extracting cyclohexanone oxime. Its advantages are low cost and no generation of pollutant.

Description

technical field [0001] The present invention relates to a kind of combined anthraquinone method to prepare H 2 o 2 The technological process of producing cyclohexanone oxime. It belongs to the production technology of cyclohexanone oxime. Background technique [0002] Caprolactam is the raw material for the production of nylon-6, which is synthesized from cyclohexanone oxime through acid-catalyzed Beckmann rearrangement. At present, cyclohexanone oxime is mainly produced through the reaction of cyclohexanone, hydroxylamine sulfate and ammonia. At the same time, low-value ammonium sulfate is produced as a by-product, which is difficult to handle and causes certain pollution to the environment. European patent (EP 311 983) has reported that cyclohexanone reacts with ammonia and H under the catalysis of titanium silicon molecular sieve TS-1. 2 o 2 A new process for direct oxime synthesis of cyclohexanone oxime. Cyclohexanone oxime has high selec...

AI Technical Summary

Problems solved by technology

At present, most manufacturers lack H 2 o 2 production of downstream products, while H 2 o 2 Storage and transportation are difficult

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