Method for synthesizing TS-1 molecular sieve

A TS-1, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor oxidation activity and high non-framework titanium content, achieve low synthesis cost, overcome activity decline, Low dosage effect
CN101434400BActive Publication Date: 2011-06-15CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2011-06-15

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Abstract

A method for synthesizing a TS-1 molecular sieve comprises the steps that: (1) the aqueous solutions of solid silica gel particles, titanium source and organo-alkali compound are mixed and treated with hydro-thermal treatment at 80-180 DEG C for 3-96 hours, wherein, the molar ratio of SiO2: TiO2: organo-alkali compound: water is 1: 0.001-0.5: 0.01-0.5: 5-100; (2) the aqueous solutions of the solid silica gel particles, the titanium source and the organo-alkali compound is mixed until the titanium source are completely hydrolyzed; wherein, the molar ratio of SiO2: TiO2: organo-alkali compound: water is 1: 0.001-0.5: 0.001-0.80: 5-150; (3) the products obtained from step (1) and step (2) are mixed; and crystallization reaction is carried out by a conventional method to recover the product; wherein, the product of step (1) accounts for 10-80 percent. The method of the invention can synthesize the TS-1 molecular sieve with certain granularity, and the synthesized molecular sieve has low content of non-skeleton titanium and has high activity, stability and selectivity when being used in oxidation reaction.
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Description

technical field

[0001] The invention relates to a method for synthesizing titanium-silicon molecular sieve (TS-1) with MFI structure. Background technique

[0002] Titanium silicate molecular sieve is a new type of heteroatom molecular sieve developed in the early 1980s. TS-1 with MFI structure, TS-2 with MEL structure, and TS-48 with larger pore structure have been synthesized so far. Among them, TS-1 molecular sieve is a molecular sieve with ZSM-5 structure containing transition metal element titanium in the framework, which has excellent performance in catalytic selective oxidation reaction, excellent stability and shape selection. TS-1 molecular sieve is used in the oxidation reaction of organic matter. It can use non-polluting low-concentration hydrogen peroxide as the oxidant, thereby simplifying the oxidation process and reducing environmental pollution. It has the incomparable advantages of energy saving, economy and environmental friendlines...

Claims

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