Polymer purification process and purification system

A purification process and polymer technology, which is applied in the field of purification process and purification system of polymer particles, can solve the problems of little progress and inconspicuous effect, and achieve stable results, good impurity removal effect and clean washing effect

Active Publication Date: 2022-01-28
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industry continues to work hard to optimize the process and equipment, but basically it is optimized on the basis of the original process route, with little progress and no obvious effect

Method used

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  • Polymer purification process and purification system
  • Polymer purification process and purification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] The polymerization solution tank is equipped with 10L of polysulfone polymer solution with a mass concentration of 25% N, N-dimethylacetamide as the solvent, which is added dropwise at a constant speed through the connecting pipe to the eluate tank with 10L deionized water as the eluate , to obtain polysulfone polymer particles (by controlling the dropping speed and the stirring speed in the eluate tank, the particle size is controlled between 0.3 and 10 mm). Then the precipitated polysulfone particles are introduced into the extrusion rollers, the extrusion roller speed is set at 100rpm, and the extrusion distance of each group of extrusion rollers is 0.6mm, the polysulfone particles are extruded by three groups of extrusion rollers successively, and the extruded At the same time, a spraying device is used to spray the eluate to the extruded polysulfone granules, extrude to remove salt impurities in the granules, and obtain washed polysulfone granules.

[0112] The was...

Embodiment 2

[0114] The polymerization solution tank is equipped with 10L of polysulfone polymer solution with a mass concentration of 25% N, N-dimethylacetamide as the solvent, which is added dropwise at a constant speed through the connecting pipe to the eluate tank with 10L deionized water as the eluate , to obtain polysulfone polymer particles (by controlling the dropping speed and the stirring speed in the eluate tank, the particle size is controlled between 0.3 and 10 mm). Then the precipitated polysulfone particles are introduced into the extrusion rollers, the extrusion roller speed is set at 100rpm, and the extrusion distance of each group of extrusion rollers is 0.6mm, the polysulfone particles are extruded by six groups of extrusion rollers in turn, and the extruded At the same time, the extruded polysulfone particles are sprayed with a spray device to remove the salt impurities in the particles. After the polysulfone particles extruded once are mixed with the eluate, the extrus...

Embodiment 3

[0117] The polymerization solution tank is equipped with 10L of polyphenylene sulfide polymer solution with a mass concentration of 25% N,N-dimethylacetamide as the solvent, which is added dropwise to 6L of deionized water and methanol mixture ( Water: methanol = 1:1) in the eluate tank to obtain polyphenylene sulfide polymer particles (by controlling the dropping speed and stirring speed in the eluate tank, the particle size is controlled between 0.3 and 10mm) . Then the precipitated polyphenylene sulfide particles are introduced into the squeeze rollers, the speed of the squeeze rollers is set at 100rpm, the extrusion distance of each set of squeeze rollers is 0.6mm, and the polyphenylene sulfide particles are squeezed through 6 sets of squeeze rollers in turn , While extruding, use a spray device to spray the precipitated liquid on the extruded polysulfone particles, and extrude to remove the salt impurities in the particles. After the polyphenylene sulfide particles extru...

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Abstract

The invention belongs to the technical field of polymer impurity removal, and provides a polymer purification process and a purification system. The purification process comprises the following steps: firstly, adding a polymerization solution containing salt impurities into an eluate, to obtain polymer particles; extruding the polymer particles obtained in the step one under the condition of spraying the eluate, and removing the salt impurities in the polymer to obtain a cleaned polymer; dissolving the salt impurities in the eluate; and finally, removing the eluate from the cleaned polymer obtained in the step two to obtain the purified polymer. The liquid content of extruded polymer particles is low, cross contamination between the eluate and washing solutions is reduced, and the treatment cost, solvent loss and waste water and waste liquid discharge of various washing solutions are greatly reduced. The process can be applied to the production process of polysulfone, polyphenylsulfone, polyethersulfone and copolymers thereof, the production process of polyphenylene sulfide and copolymers thereof, and the production process of polyether-ether-ketone, polyarylene ether nitrile and copolymers thereof.

Description

technical field [0001] The invention belongs to the technical field of polymer impurity removal, and relates to a polymer purification process and purification system, in particular to a polymer particle purification process and purification system. Background technique [0002] Some high heat-resistant resins, such as polysulfone resins, polyphenylene sulfide resins, polyether ether ketone resins, polyarylether nitrile resins, etc., are usually prepared by polycondensation reactions, and these materials are the most critical types of high-performance resins resin. This type of polycondensation usually requires the use of a high-boiling point solvent as a reaction medium, and the polymerization reaction will produce an equimolar ratio of alkali metal halide salts as by-products. [0003] For example, polysulfone resins (PSU, PPSU, PES) usually use bisphenol monomers, alkali metal carbonates or other strong bases, and dichloro monomers containing sulfone groups (commonly dic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G85/00C08F6/12B01D29/35
CPCC08G85/002C08F6/003B01D29/35
Inventor 林兴旺张瑞军吴开付赵天宝
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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