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Catalyst for epoxidation of olefin and preparation method thereof

A catalyst and epoxidation technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high phenol content, achieve low cost, simplify the preparation process, and the synthesis process is simple and easy to control.

Active Publication Date: 2017-04-26
HONGBAOLI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of high content of by-product phenol in the process of catalyzing the oxidation of propylene with cumene hydroperoxide by the catalyst in the prior art, and provides a novel catalyst for the preparation of propylene oxide through the oxidation of propylene with cumene hydroperoxide

Method used

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  • Catalyst for epoxidation of olefin and preparation method thereof
  • Catalyst for epoxidation of olefin and preparation method thereof
  • Catalyst for epoxidation of olefin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Preparation of template modifier: Put 934g castor oil and 6g KOH into a 5L reaction kettle, start stirring, and vacuumize to reduce the pressure in the kettle to below -0.085MPa, raise it to 80°C, keep warm and degas for 0.5h, and turn off the vacuum ; Feed EO, control the temperature in the kettle to 115±5°C, pressure ≤0.5MPa, feed in a total of 812.4g of EO / PO, of which EO is 380.4g, and PO is 432g. The remaining EO 253.6g was kept warm until the pressure did not drop any more, vacuumed to -0.090MPa and degassed for 0.5h, the temperature was lowered and the material was discharged to obtain ricinoleol ether in the form of pale yellow paste. The measured hydroxyl value was 83.8 mgKOH / g, and the number average molecular weight was 2100 g / mol.

[0039] Add 14g of hexadecylamine, 7g of ricinoleol ether, 200g of absolute ethanol and 350g of deionized water into a 1L reactor, raise the temperature to 45°C and stir for 2.5h, add 64g of tetraethyl orthosilicate, keep stirring ...

Embodiment 2

[0045] Cetylamine consumption is 16.2g, and ricinoleyl ether consumption is 4.8g, and all the other are identical with embodiment 1. The resulting catalyst was labeled 2#.

Embodiment 3

[0047] The templating agent is tetradecylamine, and the consumption of tetradecylamine is 14g, and the consumption of ricinoleyl ether is 7g, and the rest are the same as in Example 1. The resulting catalyst was labeled 3#.

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Abstract

The present invention relates to a catalyst for epoxidation of an olefin. The catalyst is a modified titanium silica molecular sieve, the pore size is 10-30 nm, the content of TiO is 0.5-10 wt%, the pore volume is 1.0-1.5 mL / g, the aperture distribution rate is >=93.5%, and the specific surface area is 150-500 m<2> / g. A preparation method comprises the following steps: a template agent, a template modifier, water and a solvent are added into a reactor, heating under stirring is conducted, then a silicon source is added, and thermal insulation, suction filtration and drying are conducted to obtain a molecular sieve raw powder; the molecular sieve raw powder, an extrusion aid, an adhesive agent and a glue mixing agent are mixed evenly, an obtained mixture is subjected to extrusion molding, and then drying and roasting are conducted to obtain a molded molecular sieve; a titanium source is added into the molded molecular sieve to prepare the titanium silica molecular sieve, and finally a surface modifier is added for modificationto obtain the catalyst. The catalyst provided by the present invention is suitable for catalyzing the oxidation of propylene with cumyl hydroperoxide. The conversion rate of cumyl hydroperoxide is high, the selectivity of propylene oxide is high and the content of a byproduct, namely phenol is relatively little.

Description

technical field [0001] The invention relates to a preparation method of an olefin epoxidation catalyst. The catalyst is a supported titanium-silicon molecular sieve and belongs to the field of catalyst synthesis. [0002] technical background [0003] Propylene oxide is an important basic organic chemical raw material. Traditional propylene oxide production processes such as chlorohydrin method or co-oxidation method have the disadvantages of heavy pollution, large corrosion, many co-products, and high cost. Therefore, many companies at home and abroad are devoting themselves to the development of green production technology of propylene oxide with simple process flow, clean and economical. Oxidation of propylene with cumene hydroperoxide has become one of the development directions of propylene oxide production technology due to less pollution and no co-product formation. The core of this technology is the propylene epoxidation catalyst. The structure and composition of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89B01J35/10
CPCB01J29/89B01J35/635B01J35/638B01J35/647B01J35/615
Inventor 邢益辉黄东平余渡江李霞魏斌
Owner HONGBAOLI GRP CO LTD
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