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Synthesis of titania-silica molecular sieve

A synthesis method and molecular sieve technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems that F- ions are not suitable for environmental protection requirements, and achieve easy control of the synthesis process, reduce synthesis costs, good repeatability

Inactive Publication Date: 2004-03-17
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the increasingly stringent conditions of environmental protection, the introduction of F- ions is not suitable for environmental protection requirements

Method used

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  • Synthesis of titania-silica molecular sieve
  • Synthesis of titania-silica molecular sieve
  • Synthesis of titania-silica molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step is solid silica gel and Ti(SO 4 ) 2 Preparation of the mixture

[0033] Molar ratio of SiO in solid silica gel 2 :Ti(SO 4 ) 2 TiO in 2 1:0.04, prepare the mixture, and bake at 400°C for 24 hours;

[0034] Preparation of the second reaction mixture

[0035] SiO in the mixture prepared in the previous step by molar ratio 2 +TiO 2 :TPAOH:H 2 O is 1:0.2:10, preparing the reaction mixture;

[0036] The third step of hydrothermal crystallization

[0037]Hydrothermal crystallization at 170°C for 4 days to obtain TS-1 molecular sieve.

[0038] The XRD spectrum and IR spectrum of TS-1 molecular sieve are shown in figure 1 and 2 .

Embodiment 2

[0040] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0041] The first step is solid silica gel and Ti(SO 4 ) 2 Preparation of the mixture

[0042] Calcined at 150°C for 48 hours.

[0043] XRD spectrum of TS-1 molecular sieve and figure 1 Similarly, the IR spectrum with figure 2 similar.

Embodiment 3

[0045] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0046] The first step is solid silica gel and Ti(SO 4 ) 2 Preparation of the mixture

[0047] Calcined at 600°C for 18 hours.

[0048] XRD spectrum of TS-1 molecular sieve and figure 1 Similarly, the IR spectrum with figure 2 similar.

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Abstract

The present invention is the synthesis process of Ti-Si molecular sieve, TS-1 molecular sieve, and belongs to the field of inorganic chemical synthesis. The materials, including solid silica gel, Ti(SO4)2, organic alkali template and water, are prepared into TS-1 molecular sieve via a three-step reaction process, including the preparation of solid silica gel and Ti(SO4)2 mixture, the preparationof reaction mixture and hydrothermal crystallization, and routine filtering, washing, drying and roasting. Inside the solid silica gel and Ti(SO4)2 mixture, Ti(SO4)2 is single-layer dispersed in thesurface of solid silica gel. The process has the advantages of cheap materials, no need of hydrolysis, less consumption of organic template agent, easy-to-control process, high repeatability, high yield and low cost.

Description

technical field [0001] The invention relates to a synthesis method of a titanium-silicon molecular sieve, that is, a TS-1 molecular sieve, and belongs to the technical field of inorganic chemical synthesis. Background technique [0002] TS-1 molecular sieve is a heteroatom molecular sieve developed in the early 1980s. Since the TS-1 molecular sieve introduces the transition metal titanium atoms with variable valence characteristics into the molecular sieve framework, it forms the oxidation-reduction (Redox) catalysis and endows the shape-selective function, so it has excellent directional catalytic oxidation performance and can be used as a new generation of choice. Novel catalysts for green chemistry of oxidation. At present, they have shown good industrial application prospects in the fields of oxidation of saturated alkanes, epoxidation of alkenes, oxidation of alcohols, ammoxidation of cyclohexanone, and hydroxylation of aromatic hydrocarbons. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89C01B39/08
Inventor 刘月明张海娇杨建国何鸣元
Owner EAST CHINA NORMAL UNIV
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