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Catalyst for preparing methyl methacrylate, and preparation method and esterification preparation process thereof

A methyl methacrylate and catalyst technology, applied in the preparation of carboxylate, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of long process route and high equipment requirements, reduce collision, improve viscosity, Less prone to hot spots

Pending Publication Date: 2021-04-27
丹东明珠特种树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the continuous development of my country's petrochemical industry, especially the construction of large-scale ethylene plants, the source of isobutene has become more and more abundant. However, the preparation method of isobutene oxidative esterification to produce methyl methacrylate has long process routes and high equipment requirements. technical issues

Method used

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  • Catalyst for preparing methyl methacrylate, and preparation method and esterification preparation process thereof
  • Catalyst for preparing methyl methacrylate, and preparation method and esterification preparation process thereof
  • Catalyst for preparing methyl methacrylate, and preparation method and esterification preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Catalyst A

[0019] polymerization

[0020] Weigh styrene, divinylbenzene, porogen, and initiator into the mixing tank, stir for 0.5h, and mix uniformly to form an oil phase. The porogen is hexane, and its dosage is 20% of the total mass of the oil phase. %; Add water, dispersant, and dispersant to the polymerization kettle, stir and heat up to 40~50°C to make it completely dissolved, then add the oil phase, adjust the stirring speed to 120 rpm according to the dispersion of the monomer, and slowly heat up to polymerize React for 8 hours, then cool and discharge, wash the polymer three times with hot water and cold water respectively, and separate the polymerized white balls;

[0021]

[0022] extract

[0023] Put the polymerized white balls into the extraction kettle, add excess solvent into the distillation kettle, the solvent in the distillation kettle evaporates, and flows into the extraction kettle through condensation, the solvent dissolves the ...

Embodiment 2

[0027] Embodiment 2 Catalyst B:

[0028] polymerization

[0029] Styrene, divinylbenzene, porogen, and initiator were weighed into the mixing tank, stirred for 2.0 hours, and mixed uniformly to obtain an oil phase, wherein the porogen was heptane, and the amount used was 30% of the total mass of the oil phase. Add water, dispersant, and auxiliary dispersant to the polymerization kettle, stir and heat up to 50°C, completely dissolve the water phase, add the oil phase, adjust the stirring speed to 140 rpm according to the dispersion of the monomer, slowly heat up the polymerization reaction for 18 hours, After cooling and discharging, the polymer is washed three times with hot water and cold water respectively, and the white balls are separated.

[0030]

[0031] extract

[0032] With embodiment 1.

[0033] Sulfonated

[0034] Immerse the white balls in the saturated solvent of dissolved sulfur trioxide, the mass ratio of the sulfonated base white balls to sulfur trioxide...

Embodiment 3

[0036] Embodiment 3 Catalyst C:

[0037] polymerization

[0038] Styrene, divinylbenzene, porogen, and initiator were weighed into the mixing tank, stirred for 1.0 h, and mixed uniformly to obtain an oil phase, wherein the porogen was hexane, and the dosage was 25% of the total mass of the oil phase; Add water and water, dispersant, and dispersant to the polymerization kettle, stir and heat up to 45°C, completely dissolve the water phase, add the oil phase, adjust the stirring speed to 130 rpm according to the dispersion of the monomer, and slowly heat up the polymerization reaction for 10 hours, after cooling, discharging, the polymer was washed three times with hot water and cold water respectively, and the polymerized white balls were separated;

[0039]

[0040] extract

[0041] With embodiment 1, but draw repeatedly 10 times;

[0042] Sulfonated

[0043]Immerse the sulfonated matrix white balls in the solvent for dissolving sulfur trioxide, wherein the mass ratio o...

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Abstract

The invention discloses a catalyst for preparing methyl methacrylate, a preparation method of the catalyst and a esterification preparation process. The catalyst for preparing methyl methacrylate is a styrene cationic resin catalyst, the use amount of divinyl benzene accounts for 6-12% of the mass of styrene, a pore-foaming agent is one of hexane or heptane, a dispersing agent is polyvinyl alcohol, anauxiliary dispersing agent is polyacrylamide, and a sulfonating agent in sulfonation is a dichloroethane or dichloropropene solution of sulfur trioxide. According to the methyl methacrylate esterification preparation process applying the catalyst, the molar ratio of methanol to methacrylic acid is (1.6-2.0): 1, and methyl methacrylate is prepared under the conditions that the reaction pressure is 1.0-1.5 MPa, the air speed is 0.3-0.5 h < -1 > and the reaction temperature is 70-90 DEG C. According to the technical scheme, preparation of methyl methacrylate is simplified, and the method has the reaction effects of avoiding hot spots and being high in conversion rate.

Description

technical field [0001] The invention relates to a catalyst for the esterification reaction of organic compounds and a preparation method thereof, in particular to a catalyst for preparing methyl methacrylate by catalytically synthesizing methanol and methacrylic acid and a preparation method thereof. Background technique [0002] Methyl methacrylate is a monomer material for obtaining polymethyl methacrylate, which can be copolymerized with other vinyl monomers to obtain products with different properties, such as the manufacture of organic glass, coatings, lubricating oil additives, plastics, adhesives, resins , wood impregnating agent, motor coil impregnating agent, ion exchange resin, paper polishing agent, textile printing and dyeing auxiliaries, leather treatment agent, printing and dyeing auxiliaries and insulating potting materials, etc. [0003] At present, the production of methyl methacrylate mainly includes the acetone cyanohydrin method, isobutylene method and et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/10C07C67/08C07C69/54C08F212/08C08F212/12C08F8/36
CPCC07C67/08B01J31/10C08F212/08C08F8/36B01J2231/49C07C69/54C08F212/12
Inventor 王义成何罡冷东斌吴万春吕晓东张伟彭慧敏王英杰管秀明
Owner 丹东明珠特种树脂有限公司
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