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Method for preparing epoxide

A technology of epoxides and organic peroxides, applied in chemical instruments and methods, chemical/physical processes, organic chemistry, etc.

Active Publication Date: 2010-12-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low catalyst activity, poor mass transfer effect and high production cost for the production of epoxides in the prior art, providing a New method for the production of epoxides

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] Dissolve 16.0 g of hexadecylamine in 80 mL of H 2O. In a mixed solution of 60 milliliters of ethanol and 5 milliliters (1 mol / liter) of hydrochloric acid, stir until the solution is one phase. 50.0 grams of ethyl orthosilicate dissolved in 30 milliliters of ethanol, 10.6 grams of diethyl dimethyl silicate and 4.0 grams of tetrabutyl titanate dissolved in 10 milliliters of ethanol were simultaneously added to the above mixed solution, and After stirring for 30 minutes, it crystallized for 24 hours. Then filter the obtained solid, put the filtered solid into an ion exchange column, and carry out vacuum extraction with ethanol solvent to remove the template agent therein. After extraction, it was washed three times with distilled water, and then vacuum-dried at 60° C. to obtain the catalyst precursor. Add 50 milliliters of cumene solutions containing 4.0 grams of hexamethyldisilazane in a 100 milliliter three-necked flask, add 10.0 grams of the catalyst precursor prepare...

Embodiment 2

[0022] Except that 10.6 grams of diethyl dimethyl silicate in [Example 1] was replaced by 8.5 grams of dimethyl dimethyl silicate, the rest of the conditions were the same as in [Example 1]. The finished Ti-HMS catalyst thus prepared has a specific surface area of ​​920 m 2 / g, the pore volume is 0.95 cm 3 / g, the average pore diameter is

Embodiment 3

[0024] Except that the amount of tetrabutyl titanate is 5.0 g, other conditions are the same as [Example 1]. The finished Ti-HMS catalyst thus prepared has a specific surface area of ​​900 m 2 / g, the pore volume is 0.90 cm 3 / g, the average pore diameter is

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Abstract

The invention relates to a method for preparing an epoxide. The method mainly resolves the problems in the prior art such as the low activity of catalysts for production of the epoxide, poor effect of mass transference, and high cost of production. The invention well resolves the problems through adopting the technical proposal which selects organic amine as a template, substitutes hydroxyl silicate ester as the silicon source for partial orthosilicate easter, grafts inorganic titanium to silicon dioxide framework with a hexagonal mesoporous structure to form a substance of active titanium with a four coordinating structure, and subsequently carries out alkylation treatment to produce the catalyst of the epoxide. The method provided by the invention can be applied to the industrialized production of the epoxide.

Description

technical field [0001] The present invention relates to a process for the production of epoxides. Background technique [0002] Epoxides are an important class of organic chemical intermediates. The current industrial production methods of epoxides mainly include chlorohydrin method and co-oxidation method. The chlorohydrin method produces a large amount of chlorine-containing wastewater in the production process, causing serious environmental pollution and equipment corrosion; the co-oxidation method overcomes the shortcomings of the chlorohydrin method such as pollution and corrosion, but has a long process, large investment, and many co-products. The market has influenced the production of propylene oxide to some extent. [0003] It is well known that titanium-containing porous silica materials have good catalytic activity for the selective oxidation of hydrocarbons, and can be used as catalysts for the selective oxidation of olefins to prepare epoxides. [0004] Patent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/19C07D303/04B01J29/89
Inventor 金国杰高焕新陈璐杨洪云丁琳李学锋
Owner CHINA PETROLEUM & CHEM CORP
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