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High-temperature-resistant maleic anhydride (MAH) resin catalyst and preparation method thereof

A technology of maleic anhydride and high temperature resistance is applied in the field of high temperature resistant maleic anhydride resin catalyst and its preparation, which can solve the problem of limiting the use range of ion exchange resin catalyst, easy isomerization of products into dimethyl fumarate, and the existence of free radicals in finished products. S and other problems, to achieve the effect of good catalytic effect, high temperature resistance and high selectivity

Active Publication Date: 2012-01-18
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of producing DMM is to use maleic anhydride as raw material, and carry out esterification reaction with methanol under the catalysis of sulfuric acid. Although this production process has high catalytic activity and low price, there are many side reactions and the product is easy to isomerize. Fushun Petrochemical Research Institute (FRIPP) has successfully developed maleic anhydride and methanol under the action of a solid acid catalyst through a lot of experimental work based on the above-mentioned shortcomings. The process of synthesizing DMM
[0003] In the esterification reaction of maleic anhydride (MAH) catalyzed by ion exchange resin, in order to obtain a satisfactory reaction rate, the reaction is often carried out at a higher temperature, but the resin easily loses the sulfonic acid group at a higher temperature and loses live, and lead to a large amount of free S in the finished product, which makes the finished product discolored
This limits the scope of use of ion exchange resin catalysts

Method used

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  • High-temperature-resistant maleic anhydride (MAH) resin catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1). Polymerization reaction

[0053] In the reaction kettle, add 100 parts of styrene, 5 parts of divinylbenzene, 1 part of hexafluorobutyl acrylate, and 20 parts of liquid wax in parts by weight, react at 80°C for 6 hours, then heat up to 85°C for reaction 2h, then raise the temperature to 95°C and react for 6h to end the reaction; control the degree of cross-linking at 15, the porosity to 30%, and react to form polymerized white balls. After drying, extract the liquid wax and dry it for later use;

[0054] 2). Chlorination reaction:

[0055] Add chlorine gas to the polymerized white balls obtained in step 1) to carry out chlorination reaction, the reaction temperature is 15 ° C, the reaction is protected from light, the middle sampling is detected, and the reaction is stopped when the chlorine content reaches 20%;

[0056] 3).Sulfonation reaction

[0057] The product obtained in step 2) is sulfonated with an excessive concentration of 90% sulfuric acid, and the temp...

Embodiment 2

[0059] Polymerization reaction crosslinking degree is controlled at 30%, other is the same as embodiment 1. The resulting product number is KRB-2.

Embodiment 3

[0061] Polymerization reaction crosslinking degree is controlled at 22.5%, other is the same as embodiment 1. The resulting product number was KRB-3.

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Abstract

The invention provides a high-temperature-resistant maleic anhydride (MAH) resin catalyst. The resin catalyst is a high-temperature-resistant strong acid cation catalyzed resin obtained by chlorinating fluorine-containing white balls obtained by copolymerizing an acrylic acid fluorine-containing monomer which has the crosslinking degree 15-30 percent and serves as a third monomer, and performing shallow sulfonation. The high-temperature-resistant MAH resin catalyst has a good catalytic effect in an MAH esterification reaction, high high-temperature resistance and long service life, and can be used at high temperature 100-140 DEG C. The invention further provides a preparation method of the catalyst.

Description

technical field [0001] The invention relates to a maleic anhydride resin catalyst and a preparation method thereof, in particular to a high-temperature resistant maleic anhydride resin catalyst and a preparation method thereof. Background technique [0002] Dimethyl maleate is commonly known as dimethyl maleate (DMM). Copolymers of DMM and other substances can be made into a variety of coatings, adhesives, optical materials, and anti-shrinkage materials with special properties and uses. Finishing agent, etc. Therefore, the demand for DMM at home and abroad is also increasing. The traditional method of producing DMM is to use maleic anhydride as raw material, and carry out esterification reaction with methanol under the catalysis of sulfuric acid. Although this production process has high catalytic activity and low price, there are many side reactions and the product is easy to isomerize. Fushun Petrochemical Research Institute (FRIPP) has successfully developed maleic anhy...

Claims

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Application Information

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IPC IPC(8): B01J31/10C07C69/60C07C67/08C08F212/08C08F212/36C08F220/22C08F2/44C08F8/36C08J9/28
Inventor 刘文飞王金明张勇毛进池
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH
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