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Olefin hydrocarbon epoxidation method

An epoxidation and olefin technology, applied in chemical instruments and methods, organic chemistry, molecular sieve catalysts, etc., can solve the problems of poor mass transfer effect, low catalyst activity, high production cost, and achieve reduced manufacturing cost, high catalyst activity, The effect of high production efficiency

Active Publication Date: 2011-05-18
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 in the prior art for producing epoxides, and a new method for olefin epoxidation is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 16.0 g of hexadecylamine (HDA) in 70 mL of H 2 O and 80 milliliters of ethanol in the mixed solution, stir until the solution is one phase, the solution is marked as A. Dissolve 65.0 g of tetraethyl orthosilicate in 30 milliliters of ethanol to prepare an ethanol solution of tetraethyl orthosilicate, which is denoted as B. 2.2 grams of titanium tetrachloride was added to the solution containing 2 milliliters of 30 (weight)% H 2 o 2In 10 milliliters of hydrochloric acid solution (1.0 mol / liter), be mixed with titanium tetrachloride solution, this solution is recorded as C. Add solution B and solution C to solution A at the same time, stir rapidly for 30 minutes and then crystallize for 24 hours. The resulting solid was then filtered and washed with water. The washed solid was dried at 110°C for 12 hours, and then calcined at 600°C for 4 hours to obtain the catalyst precursor. Add 50 milliliters of cumene solutions containing 4.0 grams of hexamethyldisilazan...

Embodiment 2

[0021] Except that the amount of titanium tetrachloride is 2.7 grams, all the other conditions are the same as [Example 1]. The specific surface area of ​​the finished product Ti-HMS thus obtained is 850 m 2 / g, the pore volume is 0.79 cm 3 / g, the average pore diameter is 35.0 .

Embodiment 3

[0023] Except that the amount of titanium tetrachloride is 1.5 grams, all the other conditions are the same as [Example 1]. The specific surface area of ​​the finished Ti-HMS catalyst thus obtained is 900 m 2 / g, the pore volume is 0.85 cm 3 / g, the average pore diameter is 39.5 .

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PUM

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Abstract

The invention relates to a method for epoxidation of alkene, and mainly solves the problems of low catalyst activity, poor mass transfer effect and high production cost in the prior art for producing epoxides. The method comprises the following steps: using organic amine as a template agent, grafting inorganic titanium to a silicon dioxide skeleton with a hexagonal mesoporous structure to form anactive titanium species with a four-complexation structure, and then obtaining an epoxidation catalyst through silanization treatment of the species. The method adopts the technical proposal to solvethe problems better, and can be used for industrial production of the epoxides.

Description

technical field [0001] This invention relates to a process for the epoxidation of olefins. 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 US4410...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/19B01J29/89
Inventor 金国杰高焕新杨洪云陈璐丁琳李学峰
Owner CHINA PETROLEUM & CHEM CORP
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