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Titanium silicon molecular sieve catalyst as well as preparation method and use thereof

A technology of titanium-silicon molecular sieve and catalyst, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low conversion rate and effective utilization rate of hydrogen peroxide, and achieve reduced production costs and operational difficulties. The effect of industrial production and simple molding process

Active Publication Date: 2009-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this catalyst is used for the epoxidation of 3-chloropropene, the conversion rate and effective utilization rate of hydrogen peroxide are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 12.0 grams of titanium-silicon molecular sieves, 5.6 grams of nano-alumina, 11.2 grams of 21.5% (mass) aluminum sol, 8 grams of starch, 2.0 grams of polyethylene oxide (PEO-400), 0.6 grams of octylphenol polyoxyethylene ether (OP -10), 0.5 g of water, mixed evenly, repeatedly kneaded, extruded into thin strips with a diameter of 1.2mm with an extruder, then cut into granules with a length of 1-3mm, dried at 110-125°C for 2 hours, and dried at 550°C Roasted for 6 hours to obtain a strip catalyst with a mechanical strength of 22.3N / cm 2 .

[0031] The obtained catalyst carries out chloropropene epoxidation reaction in batch kettle, reaction temperature is 50 ℃, pressure is 0.1MPa (absolute pressure), the molar ratio of 3-chloropropene and methanol is 1: 5, 3-chloropropene and hydrogen peroxide mole Under the condition that the ratio is 1.5:1 and the amount of catalyst is 5% of the total mass of the reaction liquid, the reaction time is 30 minutes, the conversion rate of ...

Embodiment 2

[0033] Mix 12.0 grams of titanium-silicon molecular sieves, 5.0 grams of nano-alumina, 13.9 grams of 21.5% (mass) aluminum sol, 8.6 grams of starch, and 1.0 grams of octylphenol polyoxyethylene ether (OP-15), knead repeatedly, and use Extrude into thin strips with a diameter of 1.2mm, then cut into particles with a length of 1-3mm, dry at 110-125°C for 2 hours, and roast at 550°C for 6 hours to obtain a strip catalyst with a mechanical strength of 22.8N / cm 2 .

[0034]The obtained catalyst carries out chloropropene epoxidation reaction in batch kettle, reaction temperature is 50 ℃, pressure is 0.1MPa (absolute pressure), the molar ratio of 3-chloropropene and methanol is 1: 5, 3-chloropropene and hydrogen peroxide mole Under the condition that the ratio is 1.5:1 and the amount of catalyst is 5% of the total mass of the reaction liquid, the reaction time is 30 minutes, the conversion rate of hydrogen peroxide is 96.04%, the effective utilization rate of hydrogen peroxide is 9...

Embodiment 3

[0037] 12.0 grams of titanium-silicon molecular sieves, 5.6 grams of nano-alumina, 11.2 grams of 21.5% (mass) aluminum sol, 8 grams of starch, 1.5 grams of polyethylene oxide (PEO-400), 1.0 grams of octylphenol polyoxyethylene ether (OP -30), 0.5 g of water, mixed evenly, repeatedly kneaded, extruded into thin strips with a diameter of 1.2 mm with an extruder, and then cut into granules with a length of 1 to 3 mm, dried at 110 to 125 ° C for 2 hours, and dried at 550 ° C Calcined for 6 hours to obtain a strip catalyst with a mechanical strength of 23.4N / cm 2 .

[0038] The obtained catalyst carries out chloropropene epoxidation reaction in batch kettle, reaction temperature is 50 ℃, pressure is 0.1MPa (absolute pressure), the molar ratio of 3-chloropropene and methanol is 1: 5, 3-chloropropene and hydrogen peroxide mole Under the condition that the ratio is 1.5:1 and the amount of catalyst is 5% of the total mass of the reaction feed liquid, the reaction time is 30 minutes, t...

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Abstract

The invention relates to a titanium silicate molecular sieve catalyst and the preparation method and the application thereof. The catalyst comprises 25-65 percent of titanium silicate molecular sieve and 20-65 percent of nanometer alumina. The mechanical strength is 20-30N / cm<2>. Prepared by an extruded moulding method, the catalyst has the characteristics of high mechanical strength, high catalytic activity and selectivity, and the like, and is especially applied to catalyzing 3-chloropropene oxidation reaction to prepare epichlorohydrin.

Description

technical field [0001] The invention relates to a titanium-silicon molecular sieve catalyst, a preparation method and application thereof. Background technique [0002] Titanium silicate molecular sieve is a general term for a class of zeolites in which titanium atoms partially replace silicon atoms in the lattice framework, such as titanium-containing zeolite TS-1 with MFI structure similar to ZSM-5 aluminosilicate zeolite and similar to ZSM-11 aluminosilicate zeolite Zeolite titanium-containing zeolite TS-2 with MEL structure and other titanium-containing zeolites similar in structure to mordenite, ZSM-12, ZSM-48, etc. Titanium-silicon molecular sieves have unique catalytic properties for various organic oxidation reactions, such as high selectivity, mild reaction conditions, no deep oxidation, and no pollutant emissions. Because TS-1 has a special three-dimensional pore structure, it has the best performance among the synthesized titanium-silicon molecular sieves. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89B01J21/04C07D301/12C07D303/08
Inventor 陈艳凤张永强刘易杜泽学
Owner CHINA PETROLEUM & CHEM CORP
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