Titanium silicon molecular sieve and resin composite modified catalyst and preparation method thereof

A titanium-silicon molecular sieve and resin composite technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of product selectivity reduction and achieve improved reaction Selectivity, excellent catalytic effect, effect of improving acidity

Active Publication Date: 2012-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But iron silicon molecular sieve/H 2 o 2 When the system epoxidizes styrene, the product is mainly phenylacetaldehyde, and the selectivity of styrene oxide is low. This is be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In the polymerization kettle, add 7.5g of titanium-silicon molecular sieve powder, 90g of polymerized monomer styrene and 30g of divinylbenzene, pore-forming agent liquid wax (C 9-11 Normal alkanes) 60g, after stirring and mixing evenly, when the temperature of the water bath was raised to 60°C, 1.5g of initiator benzoyl peroxide was added, and the reaction temperature was polymerized at 90°C for 6 hours to obtain a block titanium silicon molecular sieve catalyst. Then carry out crushing and granulation, the catalyst obtained after sieving through Taylor standard sieve with 8~9 mesh, add 1,2-dichloroethane to swell, wherein the volume ratio of 1,2-dichloroethane to catalyst is 5:1, swelling at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add ethyl acetate for solvent extraction, wherein the volume ratio of ethyl acetate to catalyst is 3:1, the extraction reaction temperature is 55°C, and the extraction time is 4 hours. The method carried out thre...

Embodiment 2

[0046] In the polymerization kettle, add 15g of titanium-silicon molecular sieve powder, 90g of polymerized monomer styrene, 15g of divinyltoluene, 25g of divinylxylene, and pore-forming agent C 5 60g of aliphatic alcohol, stirred and mixed evenly, when the temperature of the water bath was raised to 80°C, 2.0g of initiator azobisisobutanol was added, and the reaction temperature was polymerized at 100°C for 6 hours to obtain a block titanium silicon molecular sieve catalyst. Then carry out crushing and granulation, the catalyst obtained after sieving through Taylor standard sieve with 8~9 mesh, add 1,2-dichloroethane to swell, wherein the volume ratio of 1,2-dichloroethane to catalyst is 5:1, swelling at room temperature for 5 hours. After pouring out 1,2-dichloroethane, add xylene for solvent extraction, wherein the volume ratio of xylene to catalyst is 3:1, the extraction reaction temperature is 55°C, and the extraction time is 4 hours, and the same method is carried out E...

Embodiment 3

[0048] Change the weight of the titanium-silicon molecular sieve powder in Example 1 to 30g, and the treatment time in the tubular roaster is 48 hours. The rest are the same as in Example 1 to obtain a titanium-silicon molecular sieve and resin composite modified catalyst C, whose physicochemical properties are shown in Table 1 .

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PUM

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Abstract

The invention discloses a titanium silicon molecular sieve and resin composite modified catalyst and a preparation method thereof. According to the invention, titanium silicon molecular sieve powder, a polymerization monomer styrene, a polymerization monomer polyene-based compound, and a pore-forming agent are sufficiently mixed; under the existence of an initiator, a polymerization reaction is carried out; an obtained block-shaped solid catalyst is processed into solid particles; the particles are swelled in halogenated hydrocarbon; and the material is extracted by using a solvent, such that a titanium silicon molecular sieve catalyst precursor is obtained. The catalyst precursor is subjected to ammonia and nitrogen mixed gas heat treatment, such that the catalyst provided by the invention is obtained. When the catalyst provided by the invention is adopted in catalytic reaction processes of a fixed bed styrene epoxidation method for preparing styrene oxide, and a fixed bed allyl chloride epoxidation method for preparing epichlorohydrin, excellent catalytic effects are provided. With the catalyst provided by the invention, a problem of separation difficulty of titanium silicon catalyst powder and a reaction liquid is solved, and reaction efficiency is improved.

Description

technical field [0001] The invention belongs to a composite modification catalyst of titanium silicon molecular sieve and resin and a preparation method thereof. The catalyst of the invention is suitable for the catalytic reaction process of preparing styrene oxide by epoxidation of styrene and preparation of epichlorohydrin by epoxidation of propylene chloride in a fixed bed process. Background technique [0002] Since Italy Enichem first synthesized titanium-silicon molecular sieve catalyst TS-1 in 1983, it has become a hotspot in the research of oxidation catalysts due to its excellent oxidation selectivity and mild reaction conditions. This discovery is regarded as a major milestone in the development of environmentally friendly catalysts. breakthrough. [0003] Titanium-silicon molecular sieve catalysts play a very important role in the selective oxidation of organic compounds, such as the epoxidation of propylene to produce propylene oxide, the epoxidation of propylen...

Claims

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Application Information

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IPC IPC(8): B01J31/38C07D303/04C07D303/08C07D301/12
Inventor 王海波黎元生勾连科宋丽芝薛冬
Owner CHINA PETROLEUM & CHEM CORP
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