Method for preparing titanium silicon molecular sieve catalyst

A titanium-silicon molecular sieve and catalyst technology, which is used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of not well-solved catalyst and product separation difficulty, unfavorable industrial production, and cumbersome process flow and other problems to achieve the effect of reducing the occurrence of side reactions, mitigating thermal effects and improving reaction efficiency

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN1256274A has proposed the technology that titanium-silicon molecular sieve catalyzes propylene, hydrogen peroxide epoxidation to continuously produce propylene oxide, in this process, catalyzer exists with slurry state, although obtained better raw material conversion rate and product yield, but because catalyzer It is in a slurry state and needs to be separated from the product after the rea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] In the polymerization kettle, add 7.5g of titanium silicon molecular sieve powder, 90g of polymerized monomer styrene and 30g of divinylbenzene, 60g of pore-forming agent liquid wax, stir and mix well, and when the water bath is heated to 60℃, add the initiator peroxidation 1.5 g of benzoyl and a polymerization temperature of 90° C. for 6 hours to obtain a massive titanium silicate molecular sieve catalyst. Then it is crushed and granulated. After sieving, a catalyst with a suitable particle size is selected, 250 ml of 1,2-dichloroethane is added for swelling, and the swelling is performed at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add 200ml ethyl acetate for solvent extraction. The extraction reaction temperature is 55°C and the extraction time is 4 hours. The same method is used for three extractions to obtain titanium silicate catalyst A. Its physical and chemical properties are shown in Table 1.

Example Embodiment

[0032] Example 2

[0033] In the polymerization kettle, add 15g of titanium silica molecular sieve powder, 90g of polymerized monomer styrene, 15g of divinyl toluene, 25g of divinyl xylene, and pore former C 5 After stirring and mixing 60 g of fatty alcohol uniformly, when the temperature of the water bath is raised to 80°C, 2.0 g of initiator azobisisobutanol is added, and the polymerization reaction temperature is at 100°C for 6 hours to obtain a massive titanium silicon molecular sieve catalyst. Then it is crushed and granulated. After sieving, a catalyst with a suitable particle size is selected, 250 ml of 1,2-dichloroethane is added for swelling, and the swelling is carried out at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add 200ml of xylene to perform solvent extraction. The extraction reaction temperature is 55°C and the extraction time is 4 hours. The same method is used for three extractions to obtain titanium silicalite catalyst B. The physical...

Example Embodiment

[0034] Example 3

[0035] The weight of the titanium silicon molecular sieve powder in Example 1 was changed to 30 g, the extraction solvent was changed to chloroform, and the rest were the same as in Example 1, to obtain titanium silicon molecular sieve catalyst C. The physical and chemical properties are shown in Table 1.

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PUM

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Abstract

The invention discloses a method for preparing a titanium silicon molecular sieve catalyst. The method comprises the following steps of: mixing titanium silicon molecular sieve powder, polymer monomer styrene, a polymer monomer multi-alkenyl compound and a pore-forming agent completely; in the presence of an initiator, performing a polymerization reaction; smashing the obtained blocky solid catalyst; adding the smashed catalyst into halohydrocarbon to swell; and performing extraction by using a solvent to obtain the formed titanium silicon molecular sieve catalyst. The titanium silicon molecular sieve catalyst prepared by the method solves the problem that the titanium silicon catalyst powder and reaction solution are difficult to separate and improves the reaction efficiency. The titanium silicon molecular sieve catalyst is applied to a catalytic reaction of alkene epoxidation of a fixed bed process and has excellent catalytic effect.

Description

technical field [0001] The invention belongs to a preparation method of a titanium-silicon molecular sieve catalyst, which is suitable for catalytic reaction processes such as epoxidation of olefins. Background technique [0002] Since the Italian Enichem company first synthesized the lattice oxygen-selective titania-silicon molecular sieve catalyst TS-1 in 1983, it has become a hot spot in the research of oxidation catalysts due to its excellent oxidation selectivity and mild reaction conditions, and this discovery is regarded as environmentally friendly. A major breakthrough in catalyst development. [0003] Titanium-silicon molecular sieve catalysts play a very important role in the selective oxidation of organic compounds, such as the epoxidation of propylene with hydrogen peroxide under the action of titanium-silicon molecular sieve catalysts to prepare propylene oxide. In industrial applications, titanium-silicon molecular sieve catalysts exhibit excellent shape-selec...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/06B01J37/00C07D301/12C07D303/04
Inventor 方向晨王海波勾连科黎元生宋丽芝艾抚宾
Owner CHINA PETROLEUM & CHEM CORP
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