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

Regeneration method of dehydrogenating catalyst of alkyl benzene

A technology for dehydrogenation catalysts and alkylbenzenes, applied in the field of on-device regeneration of cumene dehydrogenation or dialkylbenzene dehydrogenation catalysts, and in the field of alkylethylbenzene dehydrogenation, can solve problems that do not involve catalyst regeneration methods, etc. Achieve the effects of promoting crystal phase transformation, recovery performance, and good technical effects

Active Publication Date: 2008-11-19
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no catalyst regeneration method in the literature

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 Construction

[0016] An ethylbenzene dehydrogenation reaction unit with an annual output of 100,000 tons of styrene, because the circulating ethylbenzene contains a large amount of styrene, the conversion rate of ethylbenzene in the dehydrogenation reactor dropped from 64% to 46% shortly after the unit was started. The inlet temperature of the dehydrogenation reactor has reached 637°C, the inlet pressure of the reactor is 68kPaA, and the operating water ratio is 1.46wt. Excluding other factors, it is judged that the dehydrogenation catalyst is deactivated by carbon formation, and then the catalyst is regenerated in the device. First, set the dehydrogenation reactor to normal pressure operation, reduce the outlet temperature of the main steam of the steam superheater, reduce the inlet temperature of the first and second reactors to 560°C, and stop the feeding of ethylbenzene. Continue to reduce the outlet temperature of the main steam of the steam superheating furnace to reduce the inlet tem...

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 an in-reactor generative method of an alkyl benzene dehydrogenation catalyst, and mainly solves the problems that the in-reactor generative method of alkyl benzene dehydrogenation catalyst in the unsaturated aromatic hydrocarbon production method is not related in the former documents or the generative method introduced in the former document is poor in the generative effect, therefore the prolonging of the service life of the catalyst, the reaction transformation ratio and the reaction yield coefficient are influenced, and the long down time of the device caused by the catalyst replacement influences the output of the device. The method better solves the problems by adopting the technical proposal that firstly the catalyst is swept by superheated steam at 350 to 600 DEG C and then swept by the gas mixture of air and aqueous vapor, then the amount of the aqueous vapor is gradually reduced while the amount of the air is increased, and the generation is performed to the dehydrogenation catalyst in a reactor. The method can be applied to the industrial production for preparing the unsaturated aromatic hydrocarbon by performing dehydrogenation to alkyl aromatics.

Description

technical field [0001] The invention relates to an in-vessel regeneration method for an alkylbenzene dehydrogenation catalyst, in particular to an in-vessel regeneration method for an alkylethylbenzene dehydrogenation, cumene dehydrogenation or dialkylbenzene dehydrogenation catalyst. Background technique [0002] The production of alkenylbenzene is well known in terms of dehydrogenation processes and the various catalysts used in the process. The main research objective at present is to improve the efficiency of this process. Especially known is the dehydrogenation process of alkylbenzenes, wherein the dehydrogenation is carried out in a set comprising at least two dehydrogenation reactors in series and placed between the reactors, wherein the reaction effluent is heat exchanged with steam to Carried out in a heated heating device. According to this process, steam is first used to heat the reaction effluent, which is then mixed with the alkylbenzene at the inlet of the fi...

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 Applications(China)
IPC IPC(8): B01J38/16B01J38/06C07C15/46
CPCY02P20/584
Inventor 邵百祥张忠群
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