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

Regeneration method for removing catalyst carbon deposit

A technology for catalyst and coke deposition, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of complex cleaning agent composition, complicated operation, phenol toxicity, etc., and achieve easy implementation and operation. The effect of low temperature and short operation process

Inactive Publication Date: 2011-05-18
BEIJING UNIV OF CHEM TECH
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Document CN1768955A discloses a regeneration method that uses ethanolamine, ether, butanol, and phenol as cleaning agents and cleans and calcines. Phenol has the disadvantage of toxicity

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
  • Regeneration method for removing catalyst carbon deposit
  • Regeneration method for removing catalyst carbon deposit
  • Regeneration method for removing catalyst carbon deposit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The Na-K-Mg / HZSM-5 catalyst deactivated by carbon deposits was taken out from the reaction tube, and dried in an oven for 1.5 hours at a temperature of 105 degrees Celsius. The dried catalyst was taken out and weighed to obtain 0.65 g.

[0026] Soak the dried catalyst with methanol at 20° C. for 5 hours, and the volume of methanol used is 1.5 times the volume of the catalyst. Filter out the catalyst, put it in a muffle furnace and dry it at a constant temperature of 100°C for 3 hours, then raise the temperature of the muffle furnace to 200°C for calcination at a constant temperature for 4 hours, and finally raise the temperature of the muffle furnace to 400°C for 4 hours. Take out and weigh 0.59g. The catalyst weight decreased by 9.2% after regeneration, indicating that the carbon deposits were removed.

[0027] The catalyst is loaded into the HL-1A multifunctional micro-high pressure reaction system manufactured by Hangzhou Huali Pump Industry Co., Ltd. to catalyze th...

Embodiment 2

[0032] The carbon-deactivated Ni-Co-Mn / SAPO-34 catalyst was taken out from the reaction tube and dried in an oven for 1.5 hours at a temperature of 105 degrees Celsius. The dried catalyst was taken out and weighed to obtain 0.64 g.

[0033] Soak the dried catalyst with methanol at 30° C. for 4 hours, and the volume of methanol used is twice the volume of the catalyst. Filter out the catalyst, put it in a muffle furnace and dry it at a constant temperature of 110°C for 2.5 hours, then raise the temperature of the muffle furnace to 250°C for 3 hours, and finally raise the temperature of the muffle furnace to 450°C for 3 hours. Take out and weigh 0.57g. The catalyst weight decreased by 10.9% after regeneration, indicating that the carbon deposits were removed.

[0034] The catalyst is loaded into the HL-1A multifunctional micro-high pressure reaction system manufactured by Hangzhou Huali Pump Industry Co., Ltd. to catalyze the reaction of methanol to light olefins. The reaction ...

Embodiment 3

[0039] The Na-K / HZSM-5 catalyst that the coking deactivation is taken out from the reaction tube is dried in an oven for 1.5 hours, and the drying temperature is 105 degrees Celsius. The dried catalyst is taken out and weighed to obtain 0.64g.

[0040] Soak the dried catalyst with methanol at 40° C. for 3 hours, and the volume of methanol used is 2.5 times the volume of the catalyst. Filter out the catalyst, put it into a muffle furnace and dry it at a constant temperature of 120°C for 2 hours, then raise the temperature of the muffle furnace to 300°C for 2 hours, and finally raise the temperature of the muffle furnace to 500°C for 2 hours. Take out and weigh 0.58g. The catalyst weight decreased by 9.3% after regeneration, indicating that the carbon deposits were removed.

[0041] The catalyst is loaded into the HL-1A multifunctional micro-high pressure reaction system manufactured by Hangzhou Huali Pump Industry Co., Ltd. to catalyze the reaction of methanol to light olefins...

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 present invention provides a regeneration method for removing catalyst carbon deposit, the method soaks the inactivated catalyst adopting the methanol under condition of 20-60 DEG C, after being soaked, the catalyst can be performed for subsection temperature raised calcining, the carbon deposits on the catalyst surface and in the hole channel can be removed effectively, the permanent inactivation caused by excessive heating sintering of the catalyst during carbon combusting can be avoided effectively, the method is especially adapted to the regeneration of the catalyst during preparing low carbon olefin by the methanol, the regenerated catalyst can recover reaction activity completely, the catalyst can be used circularly for long term, thereby greatly reducing the using cost of the catalyst.

Description

technical field [0001] The invention relates to a catalyst regeneration method, which is suitable for regeneration of the catalyst used in the process of producing light olefins from methanol. Background technique [0002] Catalysts are the core of the process of producing light olefins from methanol. At present, there are mainly two types of catalysts for producing low-carbon olefins from methanol, which are loaded with different contents of alkali metals, alkaline earth metals, transition metals, etc. on HZSM-5 or SAPO-34 molecular sieves Made with active ingredients. The reaction of methanol to light olefins is a typical acid-catalyzed reaction. The catalyst must have an acid center to have a good catalytic effect, and the acid center will inevitably lead to carbon deposition, because the deposition of carbon deposits on the surface and pores of the catalyst will gradually This leads to a decrease in the reactivity and selectivity of the catalyst. [0003] At present, m...

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): B01J38/52B01J38/02C07C11/02C07C1/20B01J23/92B01J23/94
CPCY02P20/584
Inventor 张敬畅张海滨佟春梅曹维良
Owner BEIJING UNIV OF CHEM TECH
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