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Continuous tubular plug flow reactor and preparation method for preparing continuous bulk SAN (Styrene-Acrylonitrile) resin

A plug-flow reactor and reactor technology, which is applied in the field of polymer material synthesis and preparation, can solve problems such as product performance fluctuations, production processes, and operating conditions and equipment parameters, and achieve excellent processing performance, narrow molecular weight distribution, and impact high intensity effect

Active Publication Date: 2013-03-20
NORTH HUAJIN CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems that the production process, operating conditions and equipment parameters change greatly and the product performance fluctuates greatly when the production capacity of the current multi-stage series plug-flow tube reactor is expanded, and provides a stability and product that does not change the reaction system. An effective way to increase polymer yields without compromising performance parameters

Method used

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  • Continuous tubular plug flow reactor and preparation method for preparing continuous bulk SAN (Styrene-Acrylonitrile) resin
  • Continuous tubular plug flow reactor and preparation method for preparing continuous bulk SAN (Styrene-Acrylonitrile) resin
  • Continuous tubular plug flow reactor and preparation method for preparing continuous bulk SAN (Styrene-Acrylonitrile) resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The prepared raw material solution, initiator and chain transfer agent are transported to the inlet of the first plug flow reactor of each group of two-stage continuous tubular plug flow reactors according to a certain ratio, and at the same time, each group of two-stage continuous tubular plug flow reactors The recycle material split at the outlet of the second plug flow reactor of the flow reactor also enters the first plug flow reactor together. The temperatures of the upper, middle and lower zones of the first plug flow reactor were 124.5°C, 127.8°C, and 130.5°C, respectively. The temperatures in the upper, middle and lower zones of the second plug flow reactor are 135.9°C, 141.2°C, and 148.8°C, respectively. The weight ratio of styrene and acrylonitrile in the raw material liquid is 76:24, and its flow rate is controlled to be 100g / h. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain tr...

Embodiment 2

[0028]The prepared raw material solution, initiator and chain transfer agent are transported to the inlet of the first plug flow reactor of each group of two-stage continuous tubular plug flow reactors according to a certain ratio, and at the same time, each group of two-stage continuous tubular plug flow reactors The recycle material split at the outlet of the second plug flow reactor of the flow reactor also enters the first plug flow reactor together. The temperatures of the upper, middle and lower zones of the first plug flow reactor were 125.2°C, 128.1°C, and 131.6°C, respectively. The temperatures in the upper, middle and lower zones of the second plug flow reactor were 135.9°C, 141.8°C, and 147.8°C, respectively. The weight ratio of styrene and acrylonitrile in the raw material liquid is 76:24, and its flow rate is controlled to be 100g / h. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain tr...

Embodiment 3

[0035] The prepared raw material solution, initiator and chain transfer agent are transported to the inlet of the first plug flow reactor of each group of two-stage continuous tubular plug flow reactors according to a certain ratio, and at the same time, each group of two-stage continuous tubular plug flow reactors The recycle material split at the outlet of the second plug flow reactor of the flow reactor also enters the first plug flow reactor together. The temperatures of the upper, middle and lower zones of the first plug flow reactor were 125.5°C, 127.9°C, and 131.6°C, respectively. The temperatures in the upper, middle and lower zones of the second plug flow reactor are 135.7°C, 140.9°C, and 149.1°C, respectively. The weight ratio of styrene and acrylonitrile in the raw material liquid is 76:24, and its flow rate is controlled to be 100g / h. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain tr...

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Abstract

The invention relates to a continuous tubular plug flow reactor and a preparation method for preparing continuous bulk SAN (Styrene-Acrylonitrile) resin. The two-stage continuous tubular plug flow reactor for producing the SAN resin has the process advantages that material staying time is consistent, the product has uniform molecular weight, good color appearance and excellent performance, and the production process is free of a wall hanging phenomenon. The two-stage continuous tubular plug flow reactor system which is connected in parallel in a multiple manner is adopted, so that the yield of the product can be increased by increasing the quantity of the parallel-connected two-stage continuous tubular plug reactors. The two-stage continuous tubular plug flow reactors which can be connected in parallel in a multiple manner have completely consistent process conditions, the materials are in similar parallel flow, the staying time is consistent, the production process is simple, the process is compact, the molecular weight distribution of the SAN resin is narrow, and the process is green and environment-friendly. The two-stage continuous tubular plug flow reactors are connected in series, so that the material at the outlet of the second reactor is controlled to circulate and reflow to the inlet of the first reactor for keeping good stability of the polymerization system.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis and preparation, relates to the field of SAN synthetic resins copolymerized with styrene and acrylonitrile, in particular to a two-stage continuous tubular plug-flow reactor system capable of multiple parallel connections and the preparation of high-performance Advanced SAN resin production process. Background technique [0002] SAN resin is a high molecular polymer copolymerized by styrene and acrylonitrile. Due to the presence of acrylonitrile, the comprehensive performance of SAN resin has been greatly improved compared with polystyrene resin (PS). SAN resin has good transparency, chemical resistance and processing fluidity, and is one of the main raw materials for preparing high-performance ABS resin. [0003] The chemical structure of styrene and acrylonitrile copolymer is relatively complex, the ratio of styrene and acrylonitrile in the copolymer segment, the molecular weight of th...

Claims

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Application Information

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IPC IPC(8): C08F212/10C08F2/01C08F2/38C08K5/134
Inventor 袁博李杨申凯华王益波李耀波张冬梅周川蔡杰郑建国刘万胜刘维钧郑树松吴玉祥刘福德范铁军张素杰史晶红
Owner NORTH HUAJIN CHEM IND CO LTD
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