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Preparation method of methacrylonitrile catalyst

A technology of methacrylonitrile catalyst and dispersant, which is applied in the field of preparation of methacrylonitrile catalyst, can solve the problems of easily broken carrier, affecting the long-term use effect of the catalyst, and easy clogging, and achieves overcoming easy breakage, increasing yield, The effect of high catalytic activity

Inactive Publication Date: 2016-10-12
张玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The methacrylonitrile catalyst in the prior art mainly uses oxides such as silicon dioxide and titanium dioxide as the catalyst carrier, which has the disadvantages that the carrier is easily broken and easily blocked, which affects the long-term use effect of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) In the reactor, add 100 parts by weight of macroporous polystyrene cation exchange resin, 5 parts of manganese tricarbonylcyclopentadiene, 3 parts of potassium pentamethylcyclopentadiene, 700 parts of water, 3 parts Hydroxypropyl methylcellulose, 1 part of benzoyl peroxide, reacted at 83°C for 8 hours, filtered, and dried to obtain intermediate product 1;

[0017] 2) In parts by weight, disperse 100 parts of intermediate product 1 in 15,000 parts of dichloroethane, add 2.1 parts of trimethylantimony, 2.3 parts of trimethylbismuth, 2.8 parts of diethylzinc, and 1.7 parts of n-butyllithium , 700 parts of tetramethylethylenediamine, reacted at 62°C for 4h, filtered and washed with methanol after the reaction, and intermediate product 2 was obtained.

[0018] 3) In parts by weight, add 3 parts of 1-5 dimethyl diselenide and 20 parts of toluene to 100 parts of intermediate product 2, react at 10°C for 2 hours, filter, and dry to obtain the catalyst product. Numbered M-1....

Embodiment 2

[0020] 1) In the reactor, add 100 parts by weight of macroporous polystyrene cation exchange resin, 1 part of manganese tricarbonylcyclopentadiene, 1 part of potassium pentamethylcyclopentadiene, 500 parts of water, 1 part Hydroxypropyl methylcellulose, 0.5 parts of benzoyl peroxide, reacted at 80°C for 12h, filtered, and dried to obtain intermediate product 1;

[0021] 2) By weight, disperse 100 parts of intermediate product 1 in 1000 parts of dichloroethane, add 1 part of trimethylantimony, 1 part of trimethylbismuth, 1 part of diethylzinc, 1 part of n-butyllithium , 500 parts of tetramethylethylenediamine, reacted at 50°C for 8h, filtered and washed with methanol after the reaction, and intermediate product 2 was obtained.

[0022] 3) In parts by weight, add 1 part of dimethyl diselenide and 10 parts of toluene to 100 parts of intermediate product 2, react at 0°C for 5 hours, filter, and dry to obtain the catalyst product. Numbered M-2.

Embodiment 3

[0024] 1) In the reactor, add 100 parts by weight of macroporous polystyrene cation exchange resin, 10 parts of manganese tricarbonylcyclopentadiene, 10 parts of potassium pentamethylcyclopentadiene, 1000 parts of water, 4 parts Hydroxypropyl methylcellulose, 2 parts of benzoyl peroxide, reacted at 95°C for 5 hours, filtered, and dried to obtain intermediate product 1;

[0025] 2) In parts by weight, disperse 100 parts of intermediate product 1 in 2000 parts of dichloroethane, add 5 parts of trimethyl antimony, 5 parts of trimethyl bismuth, 5 parts of diethyl zinc, and 5 parts of n-butyllithium , 1000 parts of tetramethylethylenediamine, reacted at 80°C for 2h, filtered and washed with methanol after the reaction, and intermediate product 2 was obtained.

[0026] 3) In parts by weight, add 10 parts of 5-dimethyldiselenide and 30 parts of toluene to 100 parts of intermediate product 2, react at 30°C for 1 hour, filter, and dry to obtain the catalyst product. Numbered M-3.

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Abstract

The invention relates to a preparation method of a methacrylonitrile catalyst. Macroporous polystyrene cation exchange resin is used as a carrier, and metal and non-metal elements such as manganese, potassium, antimony, bismuth, zinc, lithium and selenium are introduced to a framework of the carrier, so as to prepare the methacrylonitrile catalyst.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a methacrylonitrile catalyst. Background technique [0002] Methacrylonitrile is an important chemical raw material, and it can also be polymerized into polymer materials. In the 1960s, Rohm GmbH of Germany researched and developed polymethacrylimide (PMI) foam, and methacrylonitrile was one of the main raw materials. In the 1980s, due to the acetone cyanohydrin production process of the excellent thermoplastic transparent material plexiglass, which was limited by various raw materials, the consumption of raw materials was large, the cost was high, and the output increased slowly. Therefore, some people abroad have reacted methacrylonitrile with sulfuric acid to form methacrylamide sulfate, which is then hydrolyzed into acid and then esterified into methyl methacrylate (MMA). This has opened a new way for the production of plexiglass from a large amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/08B01J35/02C07C253/00C07C255/08B01J35/00
CPCC07C253/00B01J31/08B01J2231/70B01J35/00B01J35/30C07C255/08Y02P20/52
Inventor 王琪宇
Owner 张玲
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