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A kind of preparation method and application of composite titanosilicate borate catalyst

A borosilicate and catalyst technology, which is used in the preparation of organic and inorganic composite titanium borosilicate catalysts, the application fields of selective epoxidation of hydrocarbons and ammoxidation of ketones, and can solve the problem of affecting the catalytic performance of catalysts and other problems, to achieve the effect of good catalytic oxidation performance and catalytic stability, strong hydrophobicity, and broaden the research and application fields

Active Publication Date: 2016-06-29
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the titanosilicate framework contains many defect sites, these defect sites are accompanied by the acidity of the framework, which affects the catalytic performance of the catalyst to a certain extent.

Method used

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  • A kind of preparation method and application of composite titanosilicate borate catalyst
  • A kind of preparation method and application of composite titanosilicate borate catalyst
  • A kind of preparation method and application of composite titanosilicate borate catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0016] a. Preparation of inorganic titanosilicate borate

[0017] Fumed silica gel, tetrabutyl titanate, boric acid, and organic amine piperidine (PI) were mixed with water on SiO 2 :TiO 2 :B 2 o 3 :PI:H 2 O=1:35:0.35:1.4:19 molar ratio mixing, stirring at room temperature for 2 hours, and then carrying out crystallization reaction at 170°C and 1.5Mpa pressure for 120 hours, the reaction solution was filtered and dried at 550°C Roasting at lower temperature for 10 hours, after removing the organic matter, the molar composition is 0.03TiO 2 :0.04B 2 o 3 :SiO2 2 Inorganic titanosilicate borates.

[0018] b. Synthesis of composite titanosilicate borate

[0019] Mix 6 grams of the inorganic titanium silicon borate prepared above with 26.4 grams of piperidine with a concentration of 4.8 mol / L, and carry out a synthesis reaction at a temperature of 170 ° C for 20 hours to obtain titanium, silicon, boron and oxygen as the skeleton elements , and the skeleton contains a comp...

Embodiment 2

[0022] Mix 6 grams of inorganic titanosilicate borate prepared in Example 1 with 23.4 grams of piperidine with a concentration of 4.8 mol / L, and carry out a synthesis reaction at a temperature of 150° C. for 36 hours to obtain titanium, silicon, boron and oxygen as Skeleton elements, and the skeleton contains a composite titanosilicate borate with a mass ratio of 14.1% organic amine molecules.

Embodiment 3

[0024] Mix 6 grams of the inorganic titanium silicate borate prepared in Example 1 with 18.9 grams of piperidine with a concentration of 8 mol / L, and carry out a synthesis reaction at 190° C. for 36 hours to obtain titanium, silicon, boron and oxygen elements as the skeleton element, and the skeleton contains a composite titanosilicate borate with a mass ratio of 19.7% organic amine molecules.

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Abstract

The invention discloses a preparation method of a composite titanium silicon borate catalyst and an application of the catalyst. The preparation method of the composite titanium silicon borate is characterized by comprising the following steps: mixing inorganic titanium silicon borate with an organic amine solution according to a weight ratio being 1:(1-50), and carrying out synthetic reaction for 5-50 hours at the temperature of 120-200 DEG C to prepare the composite titanium silicon borate, wherein the composite titanium silicon borate takes titanium, silicon, boron and oxygen as skeleton elements, and the skeleton contains organic amine molecules with a mass ratio of 5-24%. The catalyst is applicable to epoxidation reaction between hydrocarbon compounds and acetonitrile and hydrogen peroxide and also applicable to ammoxidation reaction between ketone compounds and a solvent and ammonia. Compared with the prior art, the catalyst is strong in skeleton hydrophobicity, small in number of defect sites, excellent in catalytic oxidation performance and catalytic stability; especially, the catalytic activity of the catalyst in selective oxidation reaction of hydrocarbons and ammoxidation reaction of the ketones can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical synthesis and chemical application, in particular to a method for preparing an organic-inorganic composite titanium-silicate borate catalyst and its application in selective epoxidation of hydrocarbons and ammoxidation of ketones. Background technique [0002] Titanosilicate is a transition metal titanium atom with redox properties isomorphously substituted for silicon in the silicon-oxygen tetrahedron and introduced into the framework of titanosilicate borate. In 1983, ENI synthesized TS-1 titanium silicon molecular sieve for the first time under hydrothermal conditions, and extended the catalysis of molecular sieves to the field of selective oxidation reaction (US Patent 1983, 4410501). So far, titanosilicate molecular sieves with various structures have been successively developed, such as Ti-MWW (Journal of Physical Chemistry B, 2001, 105, 2897), Ti-MOR (J.Catal., 1997, 168, 400), T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C07D301/12C07D303/04C07C249/04C07C251/44
Inventor 吴鹏徐乐吴海虹
Owner EAST CHINA NORMAL UNIV