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Continuous method SAN resin production method based on plug flow reactor

A plug-flow reactor and production method technology, applied in chemical instruments and methods, chemical/physical/physicochemical fixed reactors, feeding devices, etc., can solve the problem of low polymerization conversion rate, mass transfer and heat transfer Problems such as difficult control and low production efficiency can be achieved to achieve the effect of ensuring fullness and comprehensiveness, improving reaction production speed, and ensuring comprehensiveness of reaction

Pending Publication Date: 2022-03-22
宁波利万新材料有限公司
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Problems solved by technology

However, when the conversion rate is high or SAN products with high acrylonitrile content are produced, the viscosity in the kettle is high, the mixing effect becomes poor, and it is difficult to control mass and heat transfer. Therefore, it is necessary to add a large amount of solvent to reduce the viscosity and control the polymerization conversion rate at the same time. Can not be too high, resulting in low production efficiency of the device

Method used

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  • Continuous method SAN resin production method based on plug flow reactor
  • Continuous method SAN resin production method based on plug flow reactor
  • Continuous method SAN resin production method based on plug flow reactor

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Embodiment 1

[0056] see Figure 1-10 , a kind of continuous process SAN resin production method based on plug flow reactor, comprises the following steps:

[0057] S1, heat up, continuously add heat medium to the inside of the reactor body 1 through the heat medium inlet 103 fixedly installed on the outer end wall of the reactor body 1, and pass through the heat medium outlet 104 pairs fixedly installed on the outer end wall of the reactor body 1 The heat medium injected inside the reactor body 1 is withdrawn, and heat medium circulation heating is formed inside the reactor body 1 to improve the ambient temperature of a plurality of reaction tubes 2 inside the reactor body 1;

[0058] S2, feeding, through multiple main feeding pipes 101 provided on the reactor body 1, styrene and acrylonitrile are added into the polymerization reactor according to the ratio of 3:1, and the molecular weight modifier is added into the polymerization reactor according to the ratio of 1000ppm;

[0059] S3, ma...

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Abstract

The invention discloses a continuous-method SAN (styrene-acrylonitrile) resin production method based on a plug flow reactor, and belongs to the field of SAN resin production.The continuous-method SAN resin production method based on the plug flow reactor comprises the steps that styrene, acrylonitrile and a conditioning agent are evenly and dispersedly introduced into a plurality of slender reaction tubes; the styrene, the acrylonitrile and the regulator are subjected to radial mixing reaction without axial mixing when flowing in the reaction tube, so that mass and heat transfer under high viscosity is facilitated, the device is suitable for producing high-molecular-weight SAN resin with higher viscosity, the high conversion rate of common-grade SAN polymerization can also be realized, and the production efficiency of the device is improved.

Description

technical field [0001] The invention relates to the field of SAN resin production, in particular to a continuous SAN resin production method based on a plug flow reactor. Background technique [0002] SAN resin, also known as AS resin, is a copolymer of styrene and acrylonitrile. It is colorless, transparent, and easy to process. It is widely used in production and life. [0003] At present, most SAN resins are produced by fully mixed-flow reactors. The process control of this reactor is relatively easy. The concentration and temperature of the materials at each point in the reactor are the same, and the uniformity of the product is better. However, when the conversion rate is high or SAN products with high acrylonitrile content are produced, the viscosity in the kettle is high, the mixing effect becomes poor, and it is difficult to control mass and heat transfer. Therefore, it is necessary to add a large amount of solvent to reduce the viscosity and control the polymerizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/44C08F2/38C08F2/01B01J4/00B01J4/02B01J19/00B01J19/24
CPCC08F212/08C08F220/44C08F2/38C08F2/01B01J19/2425B01J19/0013B01J4/02B01J4/001
Inventor 潘全旺邬灿辉郑岩陈维杰孙号飞周坤王建成阚进进
Owner 宁波利万新材料有限公司
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