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Hierarchical pore monolithic molecular sieve catalyst and preparation method and application thereof

A molecular sieve and catalyst technology, applied in the field of integral molecular sieve catalyst and its preparation, can solve problems such as poor firmness

Active Publication Date: 2021-12-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of poor fastness caused by the diffusion limitation of a single micropore of molecular sieve and the existing monolithic molecular sieve preparation method, the present invention provides A monolithic molecular sieve catalyst and its preparation method and application have broad industrial application prospects for the removal of sulfur compounds from fuels and the reaction of phenol hydroxylation

Method used

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  • Hierarchical pore monolithic molecular sieve catalyst and preparation method and application thereof
  • Hierarchical pore monolithic molecular sieve catalyst and preparation method and application thereof
  • Hierarchical pore monolithic molecular sieve catalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Add 3.31g of TPAOH aqueous solution (0.3molTPAOH, Wokai, 25%w / w aq.Soln) into 12.00g of water, then add 2.36g of TEOS (1mol, Aladdin, 98wt%), then dropwise add 2mL containing 0.06g of TBOT (0.015mol, Sinopharm, 98wt%) IPA (Shanghai test, 99.7wt%) solution to obtain 20mL premixed solution, heated and stirred at 85°C for 3h, then added 0.01gCTAB (2.7×10 -5 mol, Aladdin, 99wt%) stirred and transferred to a crystallization kettle lined with polytetrafluoroethylene, and then the pretreated cordierite carrier was immersed in the precursor solution for 6h, at a reaction temperature of 110°C and an autogenous pressure Under static crystallization for 36h. After the hydrothermal reaction is completed, the reaction solution is cooled, filtered and washed to obtain a crystalline product. The obtained crystals were dried at 110°C overnight, and then calcined in a muffle furnace at 550°C for 6 hours to obtain the product TS-MFI-1. The obtained product was determined by gravimetric...

Embodiment 2

[0075]Add 3.31g of TPAOH aqueous solution (0.3mol, Wokai, 25%w / w aq.Soln) into 12.00g of water to dissolve, then add 2.36g of TEOS (1mol, Aladdin, 98wt%), then add dropwise 2mL containing 0.06g of TBOT (0.015mol, Sinopharm, 98wt%) IPA (Shanghai test, 99.7wt%) solution to obtain 20mL premixed solution, heated and stirred at 85°C for 3h, then added 0.02g polyether F127 (1.5×10 -6 mol, Wokai, 98wt%) stirred and then transferred to a crystallization kettle with polytetrafluoroethylene lining, and then immersed the pretreated cordierite carrier in the precursor solution for 6h, at 140 ° C reaction temperature and autogenous pressure Under static crystallization for 36h. After the hydrothermal reaction is completed, the reaction solution is cooled, filtered and washed to obtain a crystalline product. The obtained crystals were dried at 110° C. overnight, and then calcined in a muffle furnace at 550° C. for 6 hours to obtain the product TS-MFI-2. The obtained product was determined...

Embodiment 3

[0077] Add 3.31g of TPAOH aqueous solution (0.3mol, Wokai, 25%w / w aq.Soln) into 12.00g of water to dissolve, then add 2.36g of TEOS (1mol, Aladdin, 98wt%), then add dropwise 2mL containing 0.06g TBOT (0.015mol, Sinopharm, 98wt%) IPA (Shanghai test, 99.7wt%) solution to obtain 20mL premixed solution, heated and stirred at 85°C for 3h, then added 0.01gCTAB (2.7×10 -5 mol, Aladdin, 99wt%) stirred and transferred to a crystallization kettle lined with polytetrafluoroethylene, and then the pretreated cordierite carrier was immersed in the precursor solution for 6h, at 140 ° C reaction temperature and autogenous pressure Under static crystallization for 36h. After the hydrothermal reaction is completed, the reaction solution is cooled, filtered and washed to obtain a crystalline product. The obtained crystals were dried at 110° C. overnight, and then calcined in a muffle furnace at 550° C. for 6 hours to obtain the product TS-MFI-3. The obtained product was determined by gravimetr...

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Abstract

The invention relates to a hierarchical pore monolithic molecular sieve catalyst for catalytic reaction and a preparation method and application thereof. The catalyst has an MFI molecular sieve configuration, the chemical composition molar ratio is mSiO2: TiO2, wherein m is greater than or equal to 20. The molecular sieve is synthesized by adopting a precursor solution prepared from a template agent, alkali, water, a silicon source and a titanium source through an in-situ growth method. The hierarchical porous monolithic titanium silicalite molecular sieve prepared according to the invention has good catalytic activity and diffusion performance, can be used in thiophene selective desulfurization and phenol hydroxylation reactions, and has good industrial application prospects.

Description

technical field [0001] The present invention relates to a monolithic molecular sieve catalyst used in catalytic reactions and its preparation method and application, which belongs to the preparation technology of supported catalysts, and specifically relates to the heterogeneous catalysis of this grade of porous titanium-silicon molecular sieve, especially for thiophene desulfurization and phenol Hydroxylation applications. Background technique [0002] Titanium silicate molecular sieve is a widely used and very important oxidation catalyst, which was first reported and synthesized by Taramasso et al. in 1983. Its structure is the same as that of ZSM-5 molecular sieve, which has a typical MFI molecular sieve configuration, high oxidation activity, excellent selectivity and stability. [0003] However, Ti-Si molecular sieves cannot effectively catalyze the conversion of large-sized molecules whose diameters are too large to access the active Ti sites located inside the micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89B01J35/10C07C37/60C07C39/08C10G27/12
CPCB01J29/89C07C37/60C10G27/12B01J2229/60C10G2300/202B01J35/64C07C39/08Y02P20/52
Inventor 刘华彦干悦柯权力卢晗锋张泽凯朱秋莲崔国凯
Owner ZHEJIANG UNIV OF TECH
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