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
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  • 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

Method used

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  • 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...

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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

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Application Information

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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
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