Microreaction method and device for continuous preparation of low-dispersion acrylic resin

A technology of acrylic resin and micro-reaction device, applied in chemical instruments and methods, chemical/physical/physical chemical process, chemical/physical process, etc., can solve the limitation of acrylic resin product performance, uneven acrylic acid concentration distribution, and product molecular weight distribution. Coefficient wide and other problems, to achieve the effect of speeding up the chain initiation process, solving the problem of explosion and narrowing the particle size distribution

Pending Publication Date: 2019-05-17
GUIZHOU MICRO CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the mixing and heat transfer performance of traditional stirred tanks for polymer solutions is generally relatively low, it is easy to cause uneven distribution of acrylic acid concentration during the reaction process, resulting in local hot spots, and further lead to loss of control of the reaction system, auto-acceleration effect or even detonation , which ultimately leads to low equipment processing capacity, wide product molecular weight distribution coefficient, and poor batch stability, which greatly limits the performance of acrylic resin products

Method used

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  • Microreaction method and device for continuous preparation of low-dispersion acrylic resin
  • Microreaction method and device for continuous preparation of low-dispersion acrylic resin
  • Microreaction method and device for continuous preparation of low-dispersion acrylic resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of micro-reaction method for continuously preparing low-dispersion acrylic resin of the present invention comprises the following steps:

[0033] (1) The solvent is N-methylpyrrolidone with a molar concentration of 0.5mol / L acrylic acid monomer solution and a mass concentration of 0.5% benzoyl peroxide solution, which are respectively transported into a micro-mixer by a metering pump to achieve uniform mixing, wherein The molar ratio of acrylic acid monomer and initiator is 40:1, and acrylic acid monomer is acrylamide and acrylate that the molar ratio is 1:1;

[0034] (2) The mixed solution from the micro-mixer enters the delayed reaction channel, and the residence time is 3 minutes. The temperature in the micro-mixer and the delayed reaction channel is 60°C, and the reaction pressure is 0.1MPa; The reaction channel enters the quenching reaction channel, the quenching temperature is -20°C, and the mixed solution in the quenching reaction channel is ultrasonically...

Embodiment 2

[0036] A kind of micro-reaction method for continuously preparing low-dispersion acrylic resin of the present invention comprises the following steps:

[0037] (1) Transport the acrylic acid monomer solution with a molar concentration of 0.7 mol / L of dimethyl sulfoxide and the ammonium persulfate solution with a mass concentration of 1% into the micro-mixer through a metering pump to achieve uniform mixing, wherein: acrylic acid monomer The molar ratio of monomer and initiation is 60:1, and the acrylic acid monomer is a mixture of acrylamide and methacrylamide with a molar ratio of 5:1;

[0038] (2) The mixed solution from the micro-mixer enters the delayed reaction channel, the reaction residence time is 4min, the temperature in the micro-mixer and the delayed reaction channel is 70°C, and the reaction pressure is 0.2MPa; The reaction channel enters the quenching reaction channel, the quenching temperature is -15°C, and the mixed solution in the quenching reaction channel is ...

Embodiment 3

[0040] A kind of micro-reaction method for continuously preparing low-dispersion acrylic resin of the present invention comprises the following steps:

[0041] (1) The acrylic acid monomer solution with a molar concentration of dimethylacetamide of 1mol / L and the azobisisobutyronitrile solution with a mass concentration of 3% were transported into the micro-mixer through a metering pump to achieve uniform mixing, in which the acrylic acid monomer The molar ratio of monomer to initiator is 80:1, and the acrylic monomer is a mixture of acrylate and methacrylate with a molar ratio of 1:5.

[0042] (2) The mixed solution from the micro-mixer enters the delayed reaction channel again, the reaction residence time is 6 min, the temperature in the micro-mixer and the delayed reaction channel is 80°C, and the reaction pressure is 0.4 MPa; When the reaction channel enters the quenching reaction channel, the quenching temperature is -10°C, and the mixed solution in the quenching reaction...

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Abstract

The invention discloses a microreaction method and device for continuous preparation of low-dispersion acrylic resin. The microreaction method includes the steps: an acrylic monomer solution and an initiator solution are transported into a micromixer through a metering pump to be mixed evenly according to the condition that the molar ratio of an acrylic monomer to an initiator is (40 to 200):1; mixed liquor discharged from the micromixer enters a delayed reaction channel to react for 3-15 min, the temperature in the micromixer and the delayed reaction channel is 60-140 DEG C, and the reactionpressure is 0.1-1 MPa; and mixed liquor discharged from the delayed reaction channel enters a quenching reaction channel, the mixed liquor in the quenching reaction channel is subjected to ultrasonicprocessing, the dwell time is 1-3 min, and the low-dispersion acrylic resin is obtained. According to the microreaction method and device for continuous preparation of the low-dispersion acrylic resin, molecular weight distribution coefficients are narrow, impurities are less, the batch is stable, mechanical performance is excellent, the reaction time is short, and energy consumption is low.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a micro-reaction method for continuously preparing low-dispersion acrylic resin, and at the same time relates to the micro-reaction device for continuously preparing low-dispersion acrylic resin. Background technique [0002] Free radical polymerization is an important way to synthesize organic macromolecules. Compared with ionic polymerization and metal-catalyzed polymerization, it has a wider application range and wider functional group selectivity; the free radical polymerization process is usually accompanied by strong exotherm. Therefore, The transfer of heat in the reaction process and the precise control of the temperature of the reaction system are extremely important for the polymerization process. Traditional industrial large-scale reaction heat usually cannot be effectively transferred, resulting in uneven local temperature in the reaction system, and the mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/10B01J19/00
Inventor 王贵城禹志宏卫炎勋杨明杰
Owner GUIZHOU MICRO CHEM TECH CO LTD
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