Resin catalyst as well as preparation method and application thereof

A technology of catalyst and resin, which is applied in the field of resin catalyst and its preparation, can solve problems such as poor conversion rate, achieve the effect of reducing bead collision, improving uniformity and improving efficiency

Pending Publication Date: 2022-03-01
王义成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, existing solid acid catalysts such as macroporous cationic resin catalysts still cannot effectively solve the disadvantages of isoformation of maleic acid esters to fumaric acid diesters and poor conversion rates due to reasons such as pore structure and particle size.

Method used

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  • Resin catalyst as well as preparation method and application thereof
  • Resin catalyst as well as preparation method and application thereof
  • Resin catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Catalyst A:

[0034] polymerization

[0035] Styrene, divinylbenzene, porogen, and initiator are weighed into the mixing tank, stirred for 0.5h, and the material and liquid are mixed evenly to become the oil phase. Add water, main dispersant, auxiliary dispersant and water-phase polymerization inhibitor into the polymerization kettle, stir and heat up to 40°C to make it completely dissolve, then add mixed monomer, adjust the stirring speed to 130 rpm according to the dispersion of the monomer, And slowly raise the temperature to 80°C for polymerization. After reacting for 8 hours, cool and discharge the polymer, wash the polymer three times with hot water and cold water respectively, and separate the white balls.

[0036] extract

[0037] Put the white ball into the extraction kettle, add excess toluene to the distillation kettle and heat it to evaporate the solvent in the kettle, and flow into the extraction kettle after condensation, the solvent will partially diss...

Embodiment 2

[0046] Catalyst B:

[0047] polymerization

[0048] Styrene, divinylbenzene, porogen, and initiator are weighed into the mixing tank, and stirred for 4.0 hours, so that the material and liquid are mixed evenly and become the oil phase. Add water, main dispersant, auxiliary dispersant and water-phase polymerization inhibitor into the polymerization kettle, stir and heat up to 50°C to make it completely dissolve, then add mixed monomer, adjust the stirring speed to 150 rpm according to the dispersion of the monomer, And slowly raise the temperature to 80°C for polymerization. After reacting for 18 hours, cool and discharge the polymer, wash the polymer three times with hot water and cold water respectively, and separate the white balls.

[0049] extract

[0050]Put the white ball into the extraction kettle, add excess toluene to the distillation kettle and heat it to evaporate the solvent in the kettle, and flow into the extraction kettle after condensation, the solvent will ...

Embodiment 3

[0058] Catalyst C:

[0059] polymerization

[0060] Styrene, divinylbenzene, porogen, and initiator are weighed into the mixing tank, and stirred for 2.0 hours to make the material and liquid mix evenly and become the oil phase. Add water, main dispersant, auxiliary dispersant and water-phase polymerization inhibitor into the polymerization kettle, stir and heat up to 45°C to dissolve completely, then add mixed monomer, adjust the stirring speed to 140 rpm according to the dispersion of the monomer, And slowly raise the temperature to 80°C for polymerization. After reacting for 12 hours, cool and discharge the polymer, wash the polymer three times with hot water and cold water respectively, and separate the white balls.

[0061] extract

[0062] Put the white ball into the extraction kettle, add excess toluene to the distillation kettle and heat it to evaporate the solvent in the kettle, and flow into the extraction kettle after condensation, the solvent will partially diss...

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Abstract

The invention discloses a resin catalyst which is prepared by the following steps: carrying out suspension copolymerization on styrene and divinyl benzene monomers in the presence of a pore-foaming agent and a dispersing agent, extracting, drying and screening to obtain copolymer white balls, sulfonating and washing to obtain cation exchange resin. Wherein ethylene glycol mono-tert-butyl ether is adopted as a pore-foaming agent, benzoyl peroxide is adopted as an initiator, polyvinyl alcohol is adopted as a main dispersing agent, calcium sulfate is adopted as an auxiliary dispersing agent, copper chloride is selected as a water-phase polymerization inhibitor, sulfur trioxide is adopted for sulfonation, and sulfur trioxide is dissolved in dichloroethane or dichloropropene and other solutions for use so as to improve the degree of sulfonation reaction.

Description

technical field [0001] The invention relates to the technical field of chemical industry, and more specifically relates to a resin catalyst and its preparation method and application. Background technique [0002] Maleic acid ester is also known as maleic acid ester. Such as dimethyl maleate, diethyl maleate, etc. It can be used as a comonomer of vinyl acetate, styrene, vinyl chloride, acrylate, etc., and as a copolymer for paints, coatings, and fiber treatment agents. Maleate is an important plasticizer; it is also used as an intermediate in organic synthesis, such as addition reaction with dienes such as butadiene and cyclopentadiene. [0003] The conventional production process is to use maleic anhydride as a raw material, and carry out esterification reaction with methanol and ethanol under the catalysis of sulfuric acid. Although this production process has high catalytic activity and low price, it has side reactions and many products are easy to isomerize. Fumaric a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/10C08F8/36C08F212/08C08J9/28C08L25/08C07C67/08C07C69/60
CPCB01J31/10C08F8/36C08J9/28C07C67/08C08J2325/08C08J2201/0502B01J2231/49C08F212/08C07C69/60
Inventor 王义成
Owner 王义成
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