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

Regeneration method of aluminum nitride loaded metal oxide catalyst

A technology for supporting metals and catalysts is applied in the field of regeneration of metal oxide catalysts, which can solve the problems of reducing catalytic performance and destroying catalyst structure, and achieves the effects of low regeneration temperature, improved reaction performance, and avoidance of catalyst structure damage.

Active Publication Date: 2022-04-08
WANHUA CHEM GRP CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst preparation temperature is below 500°C, and the high temperature above 600°C will greatly damage the catalyst structure and greatly reduce the catalytic performance.

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

[0029] The catalyst adopts the method of CN 112642455 A Example 1 to prepare aluminum nitride-supported zinc oxide catalyst, fill 10g of 40-60 mesh extruded catalyst into a fixed-bed reactor and heat up to the reaction temperature, and the phthalate The phenol-methanol reaction raw material liquid is brought to the reactor, and the reaction conditions are: the molar ratio of catechol to methanol is 0.4:1, and the feeding space velocity of catechol is 0.25h -1 , the reaction temperature is 230°C, and the catalyst is regenerated after running for 4000 hours.

[0030] The catalyst regeneration conditions are:

[0031] (1) The catalyst is regenerated in a mixed gas atmosphere of hydrogen and argon, where the mass fraction of hydrogen in the mixed gas is 20%, the regeneration pressure is 2MPa, the regeneration temperature is 220°C, and the mass space velocity of hydrogen is 0.5h -1 , the regeneration time is 2h.

[0032] (2) The catalyst is washed under pure benzene solvent, and ...

Embodiment 2

[0039] The catalyst adopts the method of CN 112642455 A Example 2 to prepare aluminum nitride-supported ferric oxide catalyst. 10 g of 40-60 mesh extruded catalyst is packed into a fixed-bed reactor and heated to the reaction temperature. The catechol-methanol reaction raw material solution is brought to the reactor, the reaction conditions are: the molar ratio of catechol to methanol is 0.3:1, and the feed space velocity of catechol is 0.2h -1 , the reaction temperature is 250°C, and the catalyst is regenerated after running for 3500h.

[0040] The catalyst regeneration conditions are:

[0041] (1) The catalyst is regenerated in a mixed gas atmosphere of hydrogen and argon, where the mass fraction of hydrogen in the mixed gas is 40%, the regeneration pressure is 3MPa, the regeneration temperature is 260°C, and the mass space velocity of hydrogen is 1.0h -1 , The regeneration time is 3h.

[0042] (2) The catalyst is washed under pure benzene solvent, and the mass space veloc...

Embodiment 3

[0049]The catalyst adopts the method of CN 112642455 A Example 3 to prepare aluminum nitride-supported lanthanum oxide catalyst. Pack 10g of 40-60 mesh extruded catalyst into a fixed-bed reactor and heat up to the reaction temperature. The catechol-methanol reaction raw material solution is brought to the reactor by the feed pump. The reaction conditions are: catechol and The molar ratio of methanol is 0.2:1, and the feed space velocity of catechol is 0.3h -1 , the reaction temperature is 220°C, and the catalyst is regenerated after running for 4000 hours.

[0050] The catalyst regeneration conditions are:

[0051] (1) The catalyst is regenerated in a mixed gas atmosphere of hydrogen and argon, where the mass fraction of hydrogen in the mixed gas is 60%, the regeneration pressure is 4MPa, the regeneration temperature is 300°C, and the mass space velocity of hydrogen is 2.0h -1 , The regeneration time is 3.5h.

[0052] (2) The catalyst is washed under pure benzene solvent, a...

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 provides a regeneration method of an aluminum nitride loaded metal oxide catalyst, which comprises the following steps: treating the catalyst by hydrogen regeneration, pure benzene cleaning and CO2 supercritical extraction in sequence, and then adding silicon dioxide sol for regeneration. The regeneration method can be carried out at low temperature, so that the influence of traditional high-temperature regeneration on the structure of the catalyst is avoided, meanwhile, carbon deposition of complex components on the catalyst can be effectively reduced and removed, and the activity of the catalyst is improved.

Description

technical field [0001] The invention relates to the field of catalyst regeneration, in particular to a regeneration method of an aluminum nitride-loaded metal oxide catalyst that catalyzes catechol and methanol to generate guaiacol. Background technique [0002] Guaiacol (English name o-methoxy-phenol), also known as o-methoxyphenol, exists in the retort oil of wood in nature. It is mainly used as a raw material for spices in industry, and it is also used in agriculture and medicine. . There are many production processes for guaiacol, among which the etherification reaction of catechol and methanol is currently the most environmentally friendly and highly competitive production process. [0003] Due to the instability of catechol, it is easy to generate carbon deposits under the action of the catalyst, covering the catalyst, and as the reaction time prolongs, the amount of carbon deposits will gradually increase, covering the active sites. [0004] Patent CN112642455A disc...

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): B01J27/28B01J38/00B01J38/10B01J38/56C07C41/09C07C43/23
CPCY02P20/54Y02P20/584
Inventor 范立耸马德森温道宏王锐刘振峰丁大康李俊平郑京涛王漭边新建刘释水冯民昌曹鹤曹文健
Owner WANHUA CHEM GRP CO LTD
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