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Modifying process for titanium-silicon molecular sieve

A titanium-silicon molecular sieve and modification technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of easy process control, simple operation and improved catalytic activity

Inactive Publication Date: 2009-04-29
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on the use of complexing agents to modify titanium-silicon molecular sieves to effectively improve the catalytic activity of titanium-silicon molecular sieves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the literature (Chemistry Letters, 2000:774), the titanium silicon molecular sieve Ti-MWW was synthesized.

[0024] In the first step, titanium-silicon molecular sieve Ti-MWW: complexing agent: the weight ratio=1:0.3:25 of water forms a reaction mixture, and the complexing agent is ethylenediaminetetraacetic acid (EDTA); in the second step, the The reaction mixture prepared in one step was reacted at 100° C. for 20 hours to obtain a modified Ti-MWW molecular sieve product.

Embodiment 2

[0026] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0027] In the first step, the titanium-silicon molecular sieve Ti-MWW: complexing agent: the weight ratio of water=1:0.5:50; in the second step, the reaction mixture prepared in the first step was reacted at 80°C for 10 hours to obtain the improved The activated Ti-MWW molecular sieve product.

Embodiment 3

[0029] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0030] In the first step, the titanium-silicon molecular sieve Ti-MWW: complexing agent: the weight ratio of water=1:0.05:8; in the second step, the reaction mixture prepared in the first step was reacted at 100°C for 10 hours to obtain the improved The activated Ti-MWW molecular sieve product.

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PUM

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Abstract

The invention discloses a modification method of Ti-Si molecular sieve, belonging to the field of inorganic chemical synthesis technique. The method uniformly mixes the Ti-Si molecular sieve and complexing agent compound solution and carries out the modification disposal at the temperature ranging from room temperature to 100 DEG C; subsequently, the modified Ti-Si molecular sieve is obtained by the normal operations of filtration, washing, drying and baking. The obtained modified Ti-Si molecular sieve has higher catalytic oxidation activity.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical synthesis, in particular to a method for modifying titanium-silicon molecular sieves. Background technique [0002] Titanium-silicon molecular sieve is the introduction of transition metal titanium atoms into the molecular sieve framework with a certain topology to form a porous crystalline material with catalytic oxidation activity. Using titanium silicate molecular sieve as catalyst and dilute H 2 o 2 It is a mild reaction system formed by an oxidant. It exhibits high activity and selectivity in organic oxidation reactions such as olefin epoxidation, aromatic hydrocarbon hydroxylation, ketone ammonia oximation, alkane oxidation, and alcohol oxidation. The by-product is only water. The environmentally friendly green chemical process has attracted widespread attention. At present, the titanium-silicon molecular sieves that have been industrialized and have wide application prospects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89
Inventor 刘月明杨俊霞姚明恺汪玲玲邢蓉吴鹏何鸣元
Owner EAST CHINA NORMAL UNIV
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