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Preparation method of acid modified titanium-containing molecular sieve

A technology of molecular sieve and acid modification, applied in molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of complicated process, improved catalytic activity, and many processing steps, and achieve easy process and high catalytic activity Improve the effect of simple and easy operation

Inactive Publication Date: 2005-08-24
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above modification methods about TS-1 molecular sieve, when the acidic solution treats TS-1 molecular sieve, the treatment temperature is below 100°C; The TS-1 molecular sieve is not particularly emphasized; the catalytic activity of the treated TS-1 molecular sieve is slightly improved, or there are many processing steps, and the process is relatively complicated

Method used

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  • Preparation method of acid modified titanium-containing molecular sieve
  • Preparation method of acid modified titanium-containing molecular sieve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Synthesize TS-1 molecular sieve raw powder according to literature (CN1488438).

[0025] In the first step, the former powder of unroasted TS-1 molecular sieve: the weight ratio=1:50 of acidic compound solution, the concentration of acidic compound solution is 2.0mol / l, and acidic compound is nitric acid; In the second step, the first step The resulting reaction mixture was reacted at 120°C for 20 hours.

[0026] The XRD spectrum of the acid-modified TS-1 molecular sieve is as follows figure 1 As shown, the UV-Vis spectrum is shown as figure 2 shown.

Embodiment 2

[0028] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0029] In the first step, the concentration of the acidic compound solution was 0.2 mol / l; in the second step, the reaction mixture prepared in the first step was reacted at 150° C. for 30 hours.

[0030] The XRD spectrum of acid-modified TS-1 molecular sieve and figure 1 Similarly, a UV-Vis spectrum with figure 2 similar.

Embodiment 3

[0032] Implementation process is except following difference, and all the other are all the same with embodiment 1:

[0033] In the first step, the concentration of the acidic compound solution was 6.0 mol / l; in the second step, the reaction mixture prepared in the first step was reacted at room temperature for 1.0 hour.

[0034] The XRD spectrum of acid-modified TS-1 molecular sieve and figure 1 Similarly, a UV-Vis spectrum with figure 2 similar.

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Abstract

A process for preparing the acid modified Ti-contained molecular sieve includes such steps as mixing the uncalcined raw powder of TS-1 molecular sieve with the solution of acidic compound, acid modifying, filtering, washing, drying and calcining. Its advantages are high purity, and high catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of an acid-modified titanium-containing molecular sieve, to be precise, relates to a preparation method of an acid-modified TS-1 molecular sieve, and belongs to the technical field of inorganic chemical synthesis. Background technique [0002] Since Taramasso et al. (US 4,410,501) first reported in 1983, TS-1 molecular sieve has attracted widespread attention due to its excellent catalytic oxidation performance. At present, using TS-1 molecular sieve as catalyst and dilute H 2 o 2 It is a mild reaction system of oxidant, which shows high activity and selectivity in organic oxidation reactions such as olefin epoxidation, aromatic hydrocarbon hydroxylation, ketone ammonia oximation, alkane oxidation and alcohol oxidation, and the by-product is only water environment Friendly green chemical process, so TS-1 molecular sieve is known as a milestone in molecular sieve catalysis in the 198...

Claims

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Application Information

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IPC IPC(8): B01J29/89C01B39/06
Inventor 吴鹏刘月明张海娇何鸣元
Owner EAST CHINA NORMAL UNIVERSITY
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