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Method for producing epoxypropane through reaction between cumyl hydroperoxide and propylene

A technology of cumene hydroperoxide and propylene oxide, which is applied in the production of bulk chemicals, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor reaction stability, low selectivity of product propylene oxide, and catalyst Low activity and other problems, to achieve the effect of reducing quantity, improving catalytic performance and increasing hydrophobicity

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that there are low catalyst activity in the prior art, low product propylene oxide selectivity, and poor reaction stability. A new method for producing propylene oxide by reacting cumene hydroperoxide and propylene is provided. method

Method used

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  • Method for producing epoxypropane through reaction between cumyl hydroperoxide and propylene
  • Method for producing epoxypropane through reaction between cumyl hydroperoxide and propylene
  • Method for producing epoxypropane through reaction between cumyl hydroperoxide and propylene

Examples

Experimental program
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Effect test

Embodiment 1

[0015] 7.23 g of n-hexadecylamine was put into a solution consisting of 63 g of deionized water and 32.2 g of ethanol, stirred and dissolved at 50° C. to form solution A. 1 mole of methyltrimethoxysilane and 0.68 g of butyl titanate were dropped into a mixed solution consisting of 6 g of isopropanol and 19 moles of ethyl orthosilicate, and stirred for 30 minutes to form solution B. Pour solution B into solution A, stir for 18 hours, filter, wash and dry, and bake at 350° C. for 8 hours to obtain precursor I. Precursor I was then placed in a quartz tubular reactor at a temperature of 100° C. under a nitrogen atmosphere, passed through N-trimethylsilyl imidazole to react for 1.5 hours, and then purged for 2 hours under a nitrogen atmosphere to obtain HMS structure titanium silicon molecular sieve. Wherein, the molar ratio of each component in the raw material is: methyltrimethoxysilane: ethyl orthosilicate: butyl titanate: hexadecylamine: water = 1: 19: 0.002: 0.03: 3.5, hexame...

Embodiment 2

[0017]Same as [Example 1], except that the molar ratio of each component in the raw material is: methyltrimethoxysilane: ethyl orthosilicate: butyl titanate: hexadecylamine: water=1: 19: 0.004: 0.04: 3.5 , under nitrogen atmosphere, the reaction temperature of precursor I and hexamethyldisilazane is 200°C, the reaction time is 3 hours, and the weight ratio of hexamethyldisilazane to precursor I is 0.05. The obtained product 29 Si CP / MAS NMR spectrogram is similar to [Example 1].

Embodiment 3

[0019] Same as [Example 1], except that the molar ratio of each component in the raw material is: methyltrimethoxysilane: ethyl orthosilicate: butyl titanate: octadecylamine: water=1: 5: 0.003: 0.04: 4.5 , under a nitrogen atmosphere, the reaction temperature of precursor I and hexamethyldisilazane is 250°C, the reaction time is 5 hours, and the weight ratio of N,0-bistrimethylsilylacetamide to precursor I is 0.005. The obtained product 29 Si CP / MAS NMR spectrogram is similar to [Example 1].

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Abstract

The invention relates to a method for producing epoxypropane through reaction between cumyl hydroperoxide and propylene, mainly aiming at solving the problems of low catalyst activity, low epoxypropane selectivity and poor reaction stability existing in the prior art. Reaction raw materials are in contact with catalyst to produce the epoxypropane by using the cumyl hydroperoxide and the propylene as the raw materials under the conditions that the molar ratio of the cumyl hydroperoxide to the propylene is 1:1 to 1:10, the reaction temperature is 50-100DEG C, the reaction pressure is 1-5MPa and the mass space velocity of the cumyl hydroperoxide is 1-30h<-1>. The catalyst is prepared by adopting a method which comprises the following steps of: a) evenly mixing organic silicon sources, inorganic silicon sources, titanium sources and organic templates with water, and filtering, water-washing, drying and roasting the product to obtain precursors I, wherein the inorganic silicon sources are selected from at least one of silica sol, silicate ester and solid silicon oxide, and the organic silicon sources are methyltrimethoxysilane; and b) by taking inert gas as carriers, feeding silanization agent into the precursors I for reaction to obtain the catalyst, wherein the silanization agent is selected from at least one of organic silane, organic silicylamine, organic silicylamide and organic silazane. By adopting the technical scheme, the problems are better solved and the method can be used for the industrial production of the epoxypropane.

Description

technical field [0001] The invention relates to a method for producing propylene oxide by reacting cumene hydroperoxide and propylene. Background technique [0002] The surface of mesoporous materials such as HMS and MCM-41 is in an amorphous state, rich in a large number of hydroxyl groups, and the surface is highly hydrophilic, which seriously affects the performance of the catalyst. Therefore, it is hoped that the hydroxyl group can be eliminated by means of modification, and the surface hydrophobicity can be increased to improve its epoxidation performance. Work in this area has attracted more and more attention from chemists. [0003] Bhaumik (Organically Modified Titanium-Rich Ti-MCM-41, Efficient Catalysts for Epoxidation Reactions) [J.Catal., 2000, 189(1): 31-39] adopts in-situ condensation method, respectively, on the surface of Ti-MCM-41 Grafted methyl, vinyl, allyl, chloropropyl, pentyl and phenyl groups. Kapoor et al. (Titanium containing inorganic-organic hyb...

Claims

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Application Information

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IPC IPC(8): C07D303/04C07D301/19B01J29/89
CPCY02P20/52
Inventor 陈璐高焕新金国杰康陈军丁琳杨洪云
Owner CHINA PETROLEUM & CHEM CORP
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