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Modified titanium silicate molecular sieve material and preparation method thereof

A titanium-silicon molecular sieve and modification technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of weak acidity, absence of titanium-silicon molecular sieves, low catalytic oxidation performance, etc. Effects of increased performance, increased added value, strong reactivity and product selectivity

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although titanium-silicon molecular sieves have strong oxidation properties, titanium-silicon molecular sieves are almost non-existent or have weak acidity, so for some specific acid-base catalytic reactions, their catalytic oxidation performance is low.

Method used

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  • Modified titanium silicate molecular sieve material and preparation method thereof
  • Modified titanium silicate molecular sieve material and preparation method thereof
  • Modified titanium silicate molecular sieve material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get the titanium-silicon molecular sieve of 10 gram hollow grains, 8.2 gram crystallization aluminum nitrate nonahydrate Al(NO 3 ) 3 9H 2 O and 4.2 g of magnesium chloride hexahydrate MgCl 2 ·6H 2 O was added into a mortar, ground and mixed, then transferred to a crucible, transferred to a muffle furnace, and roasted at 550°C for 4 hours, and the product was recovered to obtain the modified titanium-silicon molecular sieve material of the present invention (abbreviated as xMgO-yAl 2 o 3 -HTS), x=0.081, y=0.11.

[0027] The adsorption-desorption isotherm curve of the low-temperature nitrogen adsorption of this material has a hysteresis loop ( figure 2 Middle MA-HTS curve), transmission electron micrographs show that it is a hollow structure ( image 3 ).

Embodiment 2

[0029] Get the titanium-silicon molecular sieve of 10 gram hollow grains, 7.4 gram crystallization aluminum nitrate nonahydrate Al(NO 3 ) 3 9H 2 O and 8.0 g of magnesium chloride hexahydrate MgCl 2 ·6H 2 O is added to a mortar, ground and mixed, then transferred to a crucible, transferred to a muffle furnace, roasted at 550°C for 4 hours, and the product is recovered to obtain the xMgO-yAl of the present invention 2 o 3 - HTS material, x=0.134, y=0.097.

[0030] The adsorption-desorption isotherm curve of the low-temperature nitrogen adsorption of the material has figure 2 The characteristics of the hysteresis loop of the MA-HTS curve in the middle, transmission electron micrographs show that there is image 3 Characteristics.

Embodiment 3

[0032]Get the titanium-silicon molecular sieve of 10 gram hollow grains, 5.6 gram crystalline nonahydrate aluminum nitrate Al(NO 3 ) 3 9H 2 O and 3.8 g of magnesium chloride hexahydrate MgCl 2 ·6H 2 O is added to a mortar, ground and mixed, then transferred to a crucible, transferred to a muffle furnace, roasted at 550°C for 4 hours, and the product is recovered to obtain the xMgO-yAl of the present invention 2 o 3 - HTS material, x=0.076, y=0.074.

[0033] The adsorption-desorption isotherm curve of the low-temperature nitrogen adsorption of the material has figure 2 The characteristics of the hysteresis loop of the MA-HTS curve in the middle, transmission electron micrographs show that there is image 3 Characteristics.

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PUM

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Abstract

A modified titanium silicate molecular sieve material is obtained by means of modification of a titanium silicate con molecular sieve from magnesium and aluminum. The mass ratio of the magnesium, by MgO, to the titanium silicate molecular sieve is x, and x ranges from 0.001 to 0.99, the mass ratio of the aluminum, by Al203, to the titanium silicate molecular sieve is y, and y ranges from 0.001 to0.99. An acid-base effect of the material and an oxidation effect of the titanium silicate molecular sieve are realized cooperatively, better catalytic selectivity is realized, for example, the selectivity on benzenediol in reaction production of phenol hydroxylation is higher than that relative to catechol, and accordingly added values of the product can be greatly increased.

Description

technical field [0001] The invention relates to a modified acid-base bifunctional titanium-silicon molecular sieve material and a preparation method thereof, and further relates to an acid-base bifunctional titanium-silicon molecular sieve material modified by a solid-state ion migration method or a metal impregnation loading method and a preparation method thereof . Background technique [0002] Titanium-silicon molecular sieve is a new type of heteroatom molecular sieve developed in the early 1980s. At present, TS-1 with MFI structure, TS-2 with MEL structure, MCM-22 with MWW structure and TS-48 with larger pore structure have been synthesized. Among them, the titanium-silicon molecular sieve TS-1 developed and synthesized by the Italian company Enichem is a new type of titanium-silicon molecular sieve with excellent catalytic selective oxidation performance formed by introducing the transition metal element titanium into the molecular sieve framework with a ZSM-5 structu...

Claims

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Application Information

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IPC IPC(8): C01B39/08B01J29/89C07C39/08C07C37/60
CPCY02P20/52
Inventor 林民夏长久朱斌舒兴田汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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