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

Catalyst for preparing dimethylbenzene by converting methanol and preparation method of catalyst

A xylene catalyst and methanol conversion technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of unindustrialization, research stay in the experimental stage, etc., and achieve high selectivity and excellent synergy Effect

Active Publication Date: 2013-07-24
TAIYUAN UNIV OF TECH +1
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Subsequently, Mobil Corporation found in the 1980s that the modified ZSM-5 molecular sieve catalyst had higher selectivity for aromatic hydrocarbons, but this research remained in the experimental stage and was not industrialized.

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
  • Catalyst for preparing dimethylbenzene by converting methanol and preparation method of catalyst
  • Catalyst for preparing dimethylbenzene by converting methanol and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 1.5g template agent tetrapropylammonium bromide and completely dissolve it in 10ml 9.67mol / L sodium hydroxide solution, add 20ml 5.98mol / L liquid silica sol dropwise, add 1g aluminum sulfate octadecahydrate, and wait until the solution is basically clear , add 2 g of boric acid, 1 g of seed crystal EU-1 molecular sieve, stir for 60 minutes, put into the kettle, stand at 200 ° C for 2 days for crystallization, wash twice, filter, dry, and roast at 500 ° C to obtain a sodium type composite molecular sieve.

[0027] The sodium-type composite molecular sieve was ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, then ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, Filter, dry in an oven at 100°C, and place in a muffle furnace at 500°C for 4 hours to obtain a hydrogen-type composite molecular sieve.

[0028] A continuous flow fixed bed reactor (inner diameter 10...

Embodiment 2

[0031] Accurately weigh 1.1g of aluminum sulfate octadecahydrate and 0.85g of boric acid, place in 8ml of 9.67mol / L sodium hydroxide solution, add 3g of template agent tetrapropylammonium bromide, add dropwise 20ml of 5.98mol / L liquid silica sol, After the solution is evenly stirred, add 1g of EU-1 molecular sieve as a seed crystal, stir for 60 minutes, put into the kettle, stand at 200°C for crystallization for 2 days, wash with water twice, filter, dry, and roast at 500°C to obtain a sodium-type composite molecular sieve .

[0032] The sodium-type composite molecular sieve was ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, then ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, Filter, dry in an oven at 100°C, and place in a muffle furnace at 500°C for 4 hours to obtain a hydrogen-type composite molecular sieve.

[0033] A continuous flow fixed bed reactor (inner di...

Embodiment 3

[0036] Slowly drop 30ml of 4.36mol / L liquid water glass into 8ml 9.67mol / L sodium hydroxide solution, add 5g template agent tetrapropylammonium bromide, 1g aluminum sulfate octadecahydrate, stir until the solution is basically clear, then add Seed crystal EU-1 molecular sieve 1g, and then stir for 60min, finally add 1g of diboron trioxide, stir evenly, put into the kettle, stand at 170°C for crystallization for 3 days, wash with water twice, filter, dry, and roast at 500°C A sodium type composite molecular sieve is obtained.

[0037] The sodium-type composite molecular sieve was ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, then ion-exchanged with 0.1mol / L ammonium nitrate solution at 90°C for 2 hours, washed with deionized water, Filter, dry in an oven at 100°C, and place in a muffle furnace at 500°C for 4 hours to obtain a hydrogen-type composite molecular sieve.

[0038] A continuous flow fixed bed reactor (inner di...

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 discloses a catalyst for preparing dimethylbenzene by converting methanol. The catalyst disclosed by the invention consists of a ZSM-5 / EU-1 composite molecular sieve and boron, wherein the ZSM-5 / EU-1 composite molecular sieve is 95-99.5wt% of the weight of the catalyst; the weight ratio of a ZSM-5 molecular sieve to an EU-1 molecular sieve is 1:(0.1-10); and the loading amount of the boron is 0.05-5wt% by measuring according to the element. Due to the mutual synergistic effect of different types of molecular sieves and non-metallic elements, the catalyst disclosed by the invention has a higher activity; and meanwhile, the selectivity of a target product dimethylbenzene for the dimethylbenzene is greatly improved, so that the catalyst disclosed by the invention can be applied to a process of preparing dimethylbenzene by converting methanol and has the advantage of being high in methanol conversion rate and dimethylbenzene selectivity.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for directly converting methanol into xylene, and a preparation method of the catalyst. Background technique [0002] my country's BTX aromatics industry has developed rapidly, and its output and apparent consumption have reached the first place in the world. Methanol aromatization is a new way to produce BTX aromatics with coal as raw material, and it is an important supplement to the production of aromatics with petroleum as raw material in the future, which can meet the growing market demand in my country. Methanol aromatization is one of the core technologies that will be developed and applied in the new coal chemical industry during the "Twelfth Five-Year Plan" period in my country. The development of methanol aromatization technology is in line with the characteristics of my country's energy structure with more coal and less oil, and is conducive to promoting the development of my ...

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
IPC IPC(8): B01J29/80C07C15/08C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 杨冬花王新波武正簧石宝宝李晓峰窦涛
Owner TAIYUAN UNIV OF 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