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Method for preparing solid acid catalyst for preparing caprolactam

A technology of solid acid catalyst and caprolactam, applied to the preparation of lactam, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low activity and selectivity, short catalytic life, etc., and achieve high selectivity, high activity, and improved The effects of stability and selectivity

Active Publication Date: 2009-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the activity and selectivity of the solid acid catalyst in the prior art are relatively low, and the catalytic life is short, etc., and a method for preparing a solid acid catalyst for the preparation of caprolactam is provided

Method used

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  • Method for preparing solid acid catalyst for preparing caprolactam
  • Method for preparing solid acid catalyst for preparing caprolactam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Get 10 grams of catalyst A (silicon-aluminum molar ratio SiO 2 / Al 2 o 3 550 ZSM-5 molecular sieve) mixed with 10 grams of 0.4% by weight ammonium fluoride solution, treated in a sealed reactor at 150°C for 0.5 hours, filtered, washed, dried, and roasted at 420°C for 20 hours to obtain Catalyst B.

Embodiment 2

[0021] Take 1 gram of silicon-aluminum molar ratio SiO 2 / Al 2 o 3 800 ZSM-5 molecular sieve and 40 grams of 0.005% by weight ammonium fluoride solution were evenly mixed, treated in a sealed reactor at 150°C for 1 hour, filtered, washed, dried, and calcined at 600°C for 1 hour to obtain the catalyst c.

Embodiment 3

[0023] Take 1 gram of catalyst A and 20 grams of 0.005% by weight of fluosilicic acid solution, mix evenly, treat in a sealed reactor at 60°C for 50 hours, filter, wash, dry, and roast at 500°C for 6 hours to obtain catalyst D.

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Abstract

The invention relates to a method for preparing a solid acid catalyst for preparing caprolactam, mainly to overcome the defects of severe catalyst deactivation or low selectivity of caprolactam in the prior art. The invention preferably solves the problem by adopting the technical scheme of treating the MFI zeolite with fluorine-containing compounds at a temperature of 30-200 DEG C, and can be used in the industrial production of caprolactam prepared from cyclohexanone oxime.

Description

technical field [0001] The invention relates to a method for preparing a solid acid catalyst for preparing caprolactam, in particular to a method for preparing a solid acid catalyst for preparing caprolactam by gas-phase Beckmann rearrangement of cyclohexanone oxime. Background technique [0002] Caprolactam is one of the important raw materials for synthetic fibers and synthetic materials. It is mainly used in the manufacture of polyamide 6 fibers (nylon 6), resins and films. Synthetic lysine has a wide range of uses in many fields such as textiles, plastics, and fine chemicals. The Beckmann rearrangement reaction of cyclohexanone oxime is the most important process in the production process of caprolactam, which plays a key role in the influence of product quality. The current industrial production uses concentrated sulfuric acid or oleum as a catalyst to convert cyclohexanone oxime into caprolactam sulfate through liquid-phase Beckmann rearrangement reaction, and then ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C07D201/04
CPCY02P20/52
Inventor 陶伟川毛东森陈庆龄
Owner CHINA PETROLEUM & CHEM CORP