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Titanium-silicon molecular screen with MWW structure and its synthesis and application

A technology of titanium-silicon molecular sieve and molecular sieve, which is applied in the application field and can solve the problems of no titanium-silicon molecular sieve

Inactive Publication Date: 2008-03-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In summary, there is no report on the synthesis of titanium-silicon molecular sieves with MWW structure under boron-free conditions, and there is no report on titanium-silicon molecular sieves with MWW structure composed of silicon, titanium and oxygen as the skeleton.

Method used

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  • Titanium-silicon molecular screen with MWW structure and its synthesis and application

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Experimental program
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Embodiment 1

[0055] In the first step, the molar ratio of TiO in the titanium source 2 : SiO in silicon source 2 : M in mineralizer 2 O: organic templating agent: H 2O is 0.03:1:0.5:0.56:43 to prepare a reaction mixture, which is hydrothermally crystallized at 150°C for 5 days, filtered, washed, and dried to obtain an intermediate crystalline material, and the titanium source is tetrabutyl titanate Esters, silicon source is silica gel, mineralizer is potassium carbonate, organic template is the mixture of TMAdaOH and hexamethyleneimine, the mol ratio of TMAdaOH and hexamethyleneimine is 1: 1.15; In the second step, The intermediate crystalline material obtained in the first step is mixed with a concentration of 2mol / l nitric acid solution in a weight ratio of 1:50, treated at 100°C for 20 hours, filtered, washed, and dried to obtain an acid-treated product; the third In the first step, the acid-treated product obtained in the second step was roasted at 550° C. for 8 hours to obtain the ...

Embodiment 2～8

[0059] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0060] In the first step, the molar ratio composition of reaction mixture:

Embodiment 2

[0061] Example 2 0.10TiO 2 :SiO2 2 :0.5M 2 O:0.6Organic template agent:43H 2 O, hydrothermal crystallization at 170°C for 10 days;

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Abstract

The present invention is one kind of Ti-Si molecular sieve in MWW structure and its synthesis and application, and belongs to the field of inorganic chemical technology. The Ti-Si molecular sieve in MWW structure with Ti, Si and O as the skeleton elements and without B adverse to selective catalytic oxidation is prepared through synthesizing intermediate crystal material and roasting directly or after acid treatment. It is suitable for use as the catalytic oxidation catalyst, and has less surface faults, great specific surface area up to 450 sq m / g, high catalytic oxidation performance and other advantages.

Description

technical field [0001] The present invention relates to a kind of titanium-silicon molecular sieve with MWW structure and its synthesis and application, specifically, relates to a kind of titanium-silicon molecular sieve with MWW structure and its synthesis and the molecular sieve containing carbon-carbon double bond and at least one other The catalytic oxidation reaction of compounds with functional groups and the application in catalytic synthesis of oxime reactions belong to the technical field of inorganic chemical synthesis and chemical application. Background technique [0002] In general, "zeolite" is a general term designating crystalline porous aluminosilicates. The basic unit of the zeolite structure is SiO 4 and AlO 4 tetrahedron. However, since the 1980s, it has been confirmed that structures specific to or similar to the above-mentioned zeolite structures also exist in other oxides, such as aluminophosphates (US 4,310,440). [0003] In addition, the Internat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/08C01B39/46C07D301/03C07C249/08B01J29/89
Inventor 吴鹏刘月明刘娜姚明恺汪玲玲何鸣元
Owner EAST CHINA NORMAL UNIV
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