Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Chromaticity alarm and interlock method of cyclohexanone ammoximation process under the condition of fresh catalyst

A new catalyst, the technology of cyclohexanone ammonia oxime, applied in oxime preparation, organic chemistry, etc., can solve the problems of poor safety, achieve the effect of preventing explosion accidents, avoiding unplanned parking, and good technical effects

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +2
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the problem of poor safety in the prior art, and a new chromaticity alarm and interlocking method for the cyclohexanone ammoximation process under the condition of a new fresh catalyst is provided

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A chromaticity alarm and interlocking method for cyclohexanone ammoximation process under the condition of fresh catalyst, using titanium silicon molecular sieve catalyst, during the deactivation process of the fresh catalyst, the chromaticity alarm value of the clear liquid of the ammoximation reactor is 150° , the interlock value is 250°. When the chromaticity reaches the alarm value of 150°, the operator should replenish the fresh catalyst to the reaction system within 60 minutes. When the temperature reaches the interlock value of 250°, the control system should immediately start the interlock control measures, cut off the feed of hydrogen peroxide and cyclohexanone urgently, fill the emergency reactor with nitrogen, and maintain the circulation of tert-butanol.

Embodiment 2

[0020] A chromaticity alarm and interlocking method for cyclohexanone ammoximation process under the condition of fresh catalyst, using titanium silicon molecular sieve catalyst, during the deactivation process of the fresh catalyst, the chromaticity alarm value of the clear liquid of the ammoximation reactor is 200° , the interlock value is 280°; when the chromaticity reaches the alarm value of 200°, the operator should replenish the reaction system with fresh catalyst within 30 minutes. The replenishment amount is 30% of the amount of catalyst in the reaction system, which can effectively reduce the reaction The chromaticity of the clear liquid; when the chromaticity reaches the interlock value of 280°, the control system should immediately start the interlock control measures, cut off the feed of hydrogen peroxide and cyclohexanone urgently, fill the emergency reactor with nitrogen, and maintain the circulation of tert-butanol .

Embodiment 3

[0022] A chromaticity alarm and interlocking method for cyclohexanone ammoximation process under the condition of fresh catalyst, using titanium silicon molecular sieve catalyst, during the deactivation process of the fresh catalyst, the chromaticity alarm value of the clear liquid of the ammoximation reactor is 100° , the interlock value is 200°; when the chromaticity reaches the alarm value of 100°, the operator should replenish the reaction system with fresh catalyst within 1 hour. The replenishment amount is 10% of the amount of catalyst in the reaction system, which can effectively reduce the reaction rate. The chromaticity of the clear liquid; when the chromaticity reaches the interlock value of 200°, the control system should immediately start the interlock control measures, cut off the feed of hydrogen peroxide and cyclohexanone urgently, fill the emergency reactor with nitrogen, and maintain the circulation of tert-butanol .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a chromaticity warning and interlocking method for a cyclohexanone ammoximation process under the condition of a fresh catalyst. The problem of low safety in the prior art is mainly solved. By adoption of the chromaticity warning and interlocking method for the cyclohexanone ammoximation process under the condition of the fresh catalyst, in a process device for producing cyclohexanone by oxidizing cyclohexanone in hydrogen peroxide, under the condition of using the fresh catalyst and in the deactivation process of the catalyst, the warning value of ammoximation reaction clear liquid chromaticity is set to be 100 to 200 degrees and the interlocking value is set to be 200 to 400 degrees; the operation of supplementing the fresh catalyst is adopted when the ammoximation reaction clear liquid chromaticity reaches to the warning value, and a system is controlled to start interlocking action, hydrogen peroxide, cyclohexanone and ammonia feeding are cut off and a reactor is subjected to nitrogen filled protection when the ammoximation reaction clear liquid chromaticity reaches to the interlocking value, so that the technical scheme solves the above problem well and can be applied to the cyclohexanone ammoximation process.

Description

technical field [0001] The invention relates to a chromaticity alarm and interlocking method for a cyclohexanone ammoximation process under fresh catalyst conditions. Background technique [0002] Caprolactam is a monomer of synthetic fibers and engineering plastics, and has always been an important chemical raw material in short supply in the market in my country. At present, most of the production of caprolactam adopts the process route of converting cyclohexanone into cyclohexanone oxime and rearranging into caprolactam. The process of preparing cyclohexanone oxime by direct ammoxidation of cyclohexanone used in the conversion from cyclohexanone to cyclohexanone oxime is a green, environment-friendly and low-energy-consumption process. The new process of cyclohexanone ammonia oxime synthesis cyclohexanone oxime is to use cyclohexanone, ammonia and hydrogen peroxide under low pressure conditions, tert-butanol as solvent, and use titanium silicon molecular sieve catalyst t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C249/04C07C251/44
CPCC07C249/04C07C251/44
Inventor 徐伟赵磊黄飞李永祥张帆费轶石宁
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com