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Purifying method of crude polyaryletherketone product

A technology of polyaryletherketone and purification method, which is applied in the field of purification of polymer materials, can solve the problems of large amounts of waste liquid, large environmental impact, and high equipment requirements, and achieves reduced post-processing costs, simple and easy operation, and guaranteed The effect of product quality

Active Publication Date: 2015-09-09
重庆澳瑞玛高性能聚合物有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the post-treatment purification process of polyaryletherketone prepared by the electrophilic reaction route is mostly complicated and cumbersome, and a large amount of solvent is used for each treatment, and it often requires repeated washing for a long time, and sometimes high temperature and high pressure purification methods are required. It has high requirements on equipment, and a large amount of waste liquid will be generated after washing, resulting in large investment, low efficiency, and great impact on the environment, thus limiting its further development and application

Method used

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  • Purifying method of crude polyaryletherketone product

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] Put 60kg of crude polyaryletherketone into the first stirred tank, and then add 600kg of a mixed solution of formic acid aqueous solution and acetylacetone, wherein the mass ratio of formic acid aqueous solution to acetylacetone is 4.2:1, the concentration of formic acid aqueous solution is 80%, and the temperature is raised to 100°C , sealed, stirred and refluxed for 10 hours, removed most of the solution by centrifugation, put the material in the second stirred tank, stirred and washed it with 1200 kg of 60% formic acid aqueous solution at room temperature for 2 hours, centrifuged, and put the material in the third stirred tank with 600 kg of water at room temperature Wash for 4 hours, centrifuge, and dry in a double-cone dryer at 140°C for 10 hours at normal pressure, and then dry at -0.1MPa for 3 hours. After testing, there is no organic solvent residue. The catalyst metal ion residue in polyaryletherketone is 19ppm, and the moisture content is 0.2 %.

Embodiment 2

[0029] Put 60kg of crude polyaryletherketone into the first stirred tank, and then add 1200kg of a mixed solution of formic acid aqueous solution and acetylacetone, wherein the mass ratio of formic acid aqueous solution to acetylacetone is 3.8:1, the concentration of formic acid aqueous solution is 95%, and the temperature is raised to 105°C , sealed, stirred and refluxed for 8 hours, removed most of the solution by centrifugation, put the material in the second stirred tank, stirred and washed it with 600 kg of 75% formic acid aqueous solution at room temperature for 4 hours, centrifuged, and the material was placed in the third stirred tank with 1200 kg of water at room temperature Wash for 4 hours, centrifuge, dry in a double-cone dryer at 130°C for 10 hours, and then dry at negative pressure -0.085MPa for 4 hours. After testing, there is no organic solvent residue. The catalyst metal ion residue in polyaryletherketone is 13ppm, and the moisture content is 0.3 %.

Embodiment 3

[0031] Put 60kg of crude polyaryletherketone into the first stirred tank, and then add 1100kg of a mixed solution of formic acid aqueous solution and acetylacetone, wherein the mass ratio of formic acid aqueous solution to acetylacetone is 4:1, the concentration of formic acid aqueous solution is 88%, and the temperature is raised to 104°C , sealed, stirred and refluxed for 9 hours, removed most of the solution by centrifugation, put the material in the second stirred tank, stirred and washed with 1000 kg of 68% formic acid aqueous solution at room temperature for 3 hours, centrifuged, and used 1000 kg of water at room temperature in the third stirred tank. Wash for 3 hours, centrifuge, dry in a double-cone dryer at 140°C for 8 hours, and then dry for 3 hours under negative pressure at -0.09MPa. After testing, there is no organic solvent residue. The catalyst metal ion residue in polyaryletherketone is 16ppm, and the moisture content is 0.4 %.

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Abstract

The invention relates to a purifying method of high-polymer materials, in particular to a purifying method of a crude polyaryletherketone product. The purifying method includes using mixed solution of formic acid solution and acetylacetone, and washing and centrifuging the crude polyaryletherketone product; washing and centrifuging by formic acid solution; finally washing and centrifuging by water and drying to obtain pure polyaryletherketone product. The purifying method has the advantages of simplicity and feasibility in operation, few technical steps and high thermal efficiency, and after-treatment cost is greatly reduced. Acetylacetone can be complexed with catalyst metal ions, and catalyst metal ions can be removed from the crude product. Via three times of washing, metal ion content in the crude polyaryletherketone product is lowered to 20 ppm, metal ions and residual organic solvent of the polyaryletherketone product can be effectively removed, and product quality is guaranteed. Meanwhile, the solvent can be recycled, so that the purifying method is low in cost and environment friendly.

Description

technical field [0001] The invention relates to a method for purifying polymer materials, in particular to a method for purifying crude polyaryletherketone. Background technique [0002] Polyaryletherketone has excellent heat resistance, rigidity, mechanical properties and wear resistance, similar to metal materials, lighter in weight and easier to process, making it widely used in national defense, aerospace, electronic information, automobile manufacturing, petrochemical , medical and health, household appliances, automobile manufacturing and other fields, has great application prospects. [0003] At present, the preparation of polyaryletherketone can be divided into nucleophilic substitution reaction method and electrophilic substitution reaction method. The former has expensive raw materials and complicated process; the latter has low raw material price and relatively simple process. In the electrophilic substitution reaction method, when polyaryletherketone is synthes...

Claims

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Application Information

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IPC IPC(8): C08G65/46C08G65/40
Inventor 孙丰春宋国城张泰铭毕义霞张善民王荣海张聪聪贾远超
Owner 重庆澳瑞玛高性能聚合物有限公司
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