Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for activating ethylbenzene dehydrogenation

A dehydrogenation catalyst and ethylbenzene dehydrogenation technology, which is applied in the activation field of ethylbenzene dehydrogenation catalyst, can solve the problems of long induction period, low catalyst initial activity, incomplete catalyst activation, etc., and achieve initial activity improvement and activation temperature reduction , to meet the effect of long-term operation

Inactive Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the catalyst activation in the prior art is incomplete, the induction period is long, and the initial activity of the catalyst is low, and a new activation method for ethylbenzene dehydrogenation 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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for activating ethylbenzene dehydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] In the adiabatic negative pressure two-stage reactor, the reaction temperature is controlled at 580°C, the water / ethylbenzene weight ratio is 1.5:1, and the ethylbenzene space velocity is 0.25 hours -1 , Under the condition of negative pressure of 90kPaA, the activation time is 96 hours. Ethylbenzene and water vapor are mixed uniformly and passed into the reactor. The reaction product was condensed and sampled for chromatographic analysis to obtain ethylbenzene conversion, styrene selectivity and styrene yield. The results are shown in Table 1.

Embodiment 2

[0012] Adjust the reaction temperature to 560°C and change the ethylbenzene space velocity to 0.10 hours -1 , Negative pressure is made as 70kPaA, and activation time is 150 hours, and all the other are with embodiment 1.

Embodiment 3

[0014] The reaction temperature is 600°C, the weight ratio of water / ethylbenzene is changed to 2.0:1, and the space velocity of ethylbenzene is changed to 0.50 hours -1 , the activation time is 120 hours, and all the other are with embodiment 1.

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 activation method for ethylbenzene dehydrogenation catalyst, which mainly aims at solving the problems of insufficient activation of the catalyst, long induction period, low initial activity, high initial temperature of the reaction and short service life in the prior art. The invention better solves the problems by the technical scheme that dehydrogenation catalyst is activated for more than 48 hours at the reaction temperature of higher than 600 DEG C, with more than 1.5:1 of weight ratio between water and phenylethane and under the pressure of 70-150kPaA. The method has the advantages of promoting the full formation of an active center, short induction period of the catalyst and high initial activity, which can be used for preparing styrene with ethylbenzene dehydrogenation in industrial production.

Description

technical field [0001] The invention relates to an activation method of an ethylbenzene dehydrogenation catalyst. Background technique [0002] At present, the world's styrene production capacity is about 27 million tons per year, of which about 85% of the total styrene monomer is produced through ethylbenzene catalytic dehydrogenation, and the remaining 15% is produced through styrene-propylene oxide co-production legal production. The catalyst used in the catalytic dehydrogenation of ethylbenzene is Fe 2 o 3 -K 2 O composite catalyst, Fe 2 o 3 As the main active component, it uses Fe at the beginning of the reaction 3+ form exists in the catalyst. A large number of studies have shown that the dehydrogenation reaction of ethylbenzene is through Fe 3+ / Fe 2+ The conversion between them is realized, and this conversion is mainly completed in the catalyst activation stage. Therefore, the activation of the catalyst is very important. [0003] People have also done a ...

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): B01J23/78B01J23/90C07C5/327C07C15/46
CPCY02P20/584
Inventor 缪长喜顾松园宋磊邬时海廖仕杰
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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