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A kind of cotton thread is the preparation method of synthesizing small particle size multi-level structure sapo-34 as template

A SAPO-34, small particle size technology, applied in the field of synthesizing small particle size multi-level structure SAPO-34 molecular sieve, can solve the problems of single structure of SAPO-34, reducing molecular sieve particle size, large particle size, etc., to achieve good application Value, high repeatability, high surface active effect

Active Publication Date: 2020-02-14
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of high cost, single structure and large particle size of the prepared SAPO-34 in the traditional process, the SAPO-34 molecular sieve synthesized by the present invention does not need to add expensive templating agent, and the small particle size multi-level structure SAPO-34 is prepared by using cotton thread as a template Molecular sieve can significantly reduce the particle size of molecular sieve, so that the multi-level structure SAPO-34 molecular sieve has good catalytic performance

Method used

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  • A kind of cotton thread is the preparation method of synthesizing small particle size multi-level structure sapo-34 as template
  • A kind of cotton thread is the preparation method of synthesizing small particle size multi-level structure sapo-34 as template
  • A kind of cotton thread is the preparation method of synthesizing small particle size multi-level structure sapo-34 as template

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Rapeseed pollen and deionized water were formulated into a pollen suspension with a concentration of 10 wt%, and stirred until it was evenly dispersed. The mixed suspension was poured into a polytetrafluoroethylene reaction kettle, placed in an oven at 200° C. for 6 hours, and then filtered with filter paper to remove solid impurities to obtain a pollen extract. Add aluminum isopropoxide, phosphoric acid, silica sol, and triethylamine in order while stirring the obtained pollen extract, and the molar ratio is 1Al 2 o 3 : 1P 2 o 5 : 0.8SiO2 2 : 2TEA: Synthetic liquid of 300 pollen extract. The prepared synthetic solution was stirred and aged for 24 hours, then poured into a polytetrafluoroethylene reaction kettle, and 3 g of washed and dried cotton coils were added to it, statically crystallized at 200 ° C for 72 hours, and the obtained product was washed and dried to obtain The sample is SAPO-34 molecular sieve with hierarchical structure attached to cotton thread,...

Embodiment 2

[0031] Rapeseed pollen and deionized water were formulated into a pollen suspension with a concentration of 5 wt%, and stirred until it was evenly dispersed. The mixed suspension was poured into a polytetrafluoroethylene reaction kettle, placed in an oven at 200° C. for 6 hours, and then filtered with filter paper to remove solid impurities to obtain a pollen extract. Add aluminum isopropoxide, phosphoric acid, silica sol, and triethylamine in order while stirring the obtained pollen extract, and the molar ratio is 1Al 2 o 3 : 1P 2 o 5 : 0.8SiO2 2 : 2TEA: Synthetic liquid of 300 pollen extract. The prepared synthetic solution was stirred and aged for 24 hours, then poured into a polytetrafluoroethylene reaction kettle, and 3 g of washed and dried cotton coils were added to it, statically crystallized at 200 ° C for 72 hours, and the obtained product was washed and dried to obtain The sample is SAPO-34 molecular sieve with hierarchical structure attached to the cotton thre...

Embodiment 3

[0033] Rapeseed pollen and deionized water were formulated into a pollen suspension with a concentration of 40 wt%, and stirred until it was evenly dispersed. The mixed suspension was poured into a Teflon reaction kettle, placed in an oven at 200°C for 6 hours, and then filtered with filter paper to remove solid impurities to obtain a liquid. Add aluminum isopropoxide, phosphoric acid, silica sol, and triethylamine in order while stirring the obtained pollen extract, and the molar ratio is 1Al 2 o 3 : 1P 2 o 5 : 0.8SiO2 2 : 15TEA : 300 pollen extract. The prepared synthetic solution was stirred and aged for 24 hours, then poured into a polytetrafluoroethylene reaction kettle, and 3 g of washed and dried cotton coils were added to it, statically crystallized at 200 ° C for 24 hours, and the obtained product was washed and dried to obtain The sample is SAPO-34 molecular sieve with hierarchical structure attached to the cotton thread, the particle size is 0.5-3μm, and then t...

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Abstract

The invention belongs to the field of multi-stage structure SAPO-34, and in particular relates to a method for preparing small-diameter multi-stage SAPO-34 molecular sieves by doping with cotton threads. In the present invention, pollen extract is used instead of deionized water to prepare SAPO-34 synthesis liquid, and cotton thread is added to prepare SAPO-34 molecular sieve with small particle size and multi-stage structure through hydrothermal synthesis. The particle size of the SAPO-34 molecular sieve synthesized by the invention is 0.5-3 μm, the particle size is small, and no expensive template agent needs to be added, which solves the problem of high cost in the traditional process. The SAPO-34 molecular sieve with small particle size and multi-level structure prepared by the invention has good catalytic performance and remarkable economic value and social benefit.

Description

technical field [0001] The invention belongs to the field of SAPO-34 molecular sieves, and in particular relates to a method for synthesizing SAPO-34 molecular sieves with small particle size and multi-stage structure by using cotton thread as a template. Background technique [0002] Light olefins (ethylene, propylene) are important raw materials in petrochemicals, and can be used to synthesize chemical materials such as detergents, fibers, and plastics. The traditional production route of light olefins is mainly produced through petroleum cracking. However, my country's petroleum resources are in short supply. Therefore, producing methanol from coal or natural gas, and then dehydrating methanol to ethylene and propylene is an important way to alleviate the shortage of my country's petroleum resources and promote low-carbon production. An effective way for the industrial production of olefins. The core of the methanol-to-olefins (MTO) reaction is the catalyst. Researchers h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/54
CPCC01B39/54C01P2004/03C01P2004/61C01P2004/62
Inventor 杨舒贡洁宋烁烁邹宇洲陈文轩童霏
Owner JIANGSU UNIV OF TECH
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