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Method for refining polyether ketone ketone crude product by adopting sodium gluconate

A technology of sodium gluconate and polyether ketone ketone, which is applied in the field of refining polyether ketone ketone crude products by using sodium gluconate, can solve the problems of increasing the amount of organic solvent, environmental pollution, cumbersome process, etc., and achieves obvious economic and environmental advantages, The effect of reducing production cost and improving production efficiency

Active Publication Date: 2018-08-28
SHANDONG KAISHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional methods generally use solvents such as hydrochloric acid, chlorinated alkanes, and alcohols to remove residual metal ion impurities through repeated washing. The process is cumbersome, the treatment efficiency is low, the toxicity is high, the safety risk is high, and the environment is seriously polluted, which is not conducive to product quality stability and scale. production, and the high production cost seriously affects the large-scale application and promotion of polyether ketone ketone
CN200410081436 uses organic solvents and surfactants for purification, which increases the amount of organic solvents and increases production costs; US20050004340 uses high-temperature and high-pressure purification methods, which improves the use requirements of equipment; CN200910009128 uses acid purification methods, a large number of Acid solution brings difficulties to the biochemical treatment of post-production wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 20g polyether ketone ketone crude product (Al 3+ Content 4200ppm), the particle size range is 1 ~ 2mm, add in 1000ml reaction vessel, add the aqueous solution 400g of the dimethyl sulfoxide that mass concentration is 5% afterwards, raise temperature and stir and reflux for 2 hours; then add 10% of Sodium gluconate aqueous solution 400g, reflux and stir for 6 hours, cool down to 23°C and filter to obtain the primary product of polyether ketone ketone; the primary product was washed with 600g of water under reflux for 3 times, then filtered and dried to obtain pure white polyether ketone ketone , detected by ICP, its Al 3+ The content is 35ppm, which meets the high-temperature use and processing requirements of polyether ketone ketone.

Embodiment 2

[0031] Get 20g polyether ketone ketone crude product (Al 3+ Content 4200ppm), the particle size range is 0.5 ~ 1.5mm, put it into a 1000ml reaction vessel, and then add 300g of an aqueous solution of dimethyl sulfoxide with a mass concentration of 2%, raise the temperature and stir and reflux for 3 hours; then add 5% 300g of sodium gluconate aqueous solution, reflux and stir for 5 hours, cool down to 25°C and filter to obtain the primary product of polyether ketone ketone; the primary product was washed 4 times with 500g of water under reflux, then filtered and dried to obtain pure white polyether ketone ketone Products, detected by ICP, its Al 3+ The content is 45ppm, which meets the high-temperature use and processing requirements of polyether ketone ketone.

Embodiment 3

[0033] Get 20g polyether ketone ketone crude product (Al 3+ Content 4200ppm), particle size range is 0.1 ~ 1mm, put into 1000ml reaction vessel, then add 200g of aqueous solution of dimethyl sulfoxide with a mass concentration of 1%, raise the temperature and stir and reflux for 4 hours; then add 8% of Sodium gluconate aqueous solution 200g, reflux and stir for 4 hours, cool down to 20°C and filter to obtain the primary product of polyether ketone ketone; the primary product was reflux washed with 400g water for 5 times, then filtered and dried to obtain pure white polyether ketone ketone , detected by ICP, its Al 3+ The content is 41ppm, which meets the high-temperature use and processing requirements of polyether ketone ketone.

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Abstract

The invention relates to a refining method of macromolecule materials and in particular relates to a method for refining poly(ether-ketone-ketone) crude products by using sodium gluconate. The refining method comprises the following steps: firstly carrying out reflux agitation on a certain quantity of poly(ether-ketone-ketone) crude products in a dimethyl sulfoxide aqueous solution, then adding a sodium gluconat aqueous solution for carrying out reflux agitation, cooling and then filtering; carrying out reflux washing via water, filtering and drying to obtain poly(ether-ketone-ketone) pure products. Through the utilization of the swelling property of the dimethyl sulfoxide aqueous solution on poly(ether-ketone-ketone), a poly(ether-ketone-ketone) molecular chain tightly wrapped with catalyst impurities can be opened, so that the impurity ions can be exposed and diffused into a medium; meanwhile, through the utilization of the efficient metal-chelating capability of sodium gluconate, metal ions can be continuously captured, so that Al<3+> in the poly(ether-ketone-ketone) crude products can be efficiently removed.

Description

technical field [0001] The invention relates to a method for refining polymer materials, in particular to a method for refining crude polyether ketone ketone by using sodium gluconate. Background technique [0002] Polyether ketone ketone (PEKK) is a high-performance semi-crystalline thermoplastic polymer, which belongs to the family of polyarylether ketone special polymer materials. Radiation and flame retardancy have broad application prospects in the fields of national defense, aerospace, electronic information, automobile manufacturing, petrochemical, medical and health, and household appliances. [0003] The electrophilic substitution reaction route to synthesize PEKK usually uses the Friedel-Crafts reaction catalyst AlCl 3 Synthesis, the reaction process requires a large amount of catalysts, due to the entanglement of macromolecular chains, some catalysts are firmly wrapped in the polymer, and catalysts inevitably remain in the polymer, and the higher Al 3+ The resid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/46C08G65/40
CPCC08G65/4012C08G65/46C08G2650/40
Inventor 李光辉贾远超张泰铭孙庆民薛居强黄桂青李云龙马团芝
Owner SHANDONG KAISHENG NEW MATERIALS