Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for refining polyetherketoneketone crude product by using 2-hydroxyphosphonoacetic acid

A technology of polyether ketone ketone and refining method, which is applied in the field of refining polymer materials, can solve problems such as high safety risks, environmental pollution, and cumbersome processes, and achieve the effects of improving product quality, reducing production costs, and improving production efficiency

Inactive Publication Date: 2016-10-26
SHANDONG KAISHENG NEW MATERIALS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional process generally uses solvents such as hydrochloric acid, chlorinated alkanes, and alcohols to remove residual metal ion impurities after 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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 400g of 2-hydroxyphosphonoacetic acid aqueous solution, 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 white polyether Pure ketone, tested by ICP, its Al 3+ The content is 32ppm, 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 2-hydroxyphosphonoacetic acid aqueous solution, stirred under reflux for 5 hours, cooled to 25°C and filtered to obtain the primary product of polyether ketone ketone; the primary product was washed with 500g of water for 4 times, then filtered and dried to obtain white polyether ketone ketone. Pure ether ketone ketone, 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 200g of 2-hydroxyphosphonoacetic acid aqueous solution, 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 washed with 400g of water for 5 times, then filtered and dried to obtain white polyether Pure ketone, tested by ICP, its Al 3+ The content is 40ppm, which meets the high-temperature use and processing requirements of polyether ketone ketone.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a refinement method of a high-polymer material, particularly a method for refining a polyetherketoneketone crude product by using 2-hydroxyphosphonoacetic acid. The method comprises the following steps: stirring a certain amount of the polyetherketoneketone crude product in a dimethyl-sulfoxide-containing water solution under reflux; adding a 2-hydroxyphosphonoacetic acid water solution, stirring under reflux, cooling and filtering; and washing with water under reflux, filtering, and drying to obtain the polyetherketoneketone pure product. By utilizing the swelling characteristic of the dimethyl sulfoxide water solution for the polyetherketoneketone, the polyetherketoneketone molecular chain closely coated on the catalyst impurities can be pulled off, so that the impurity ions are exposed and diffused into the medium. The efficient metal chelation capacity of the 2-hydroxyphosphonoacetic acid is utilized to continuously trap metal ions, thereby effectively removing Al<3+> from the polyetherketoneketone crude product.

Description

technical field [0001] The invention relates to a method for refining polymer materials, in particular to a method for refining crude polyetherketoneketone by using 2-hydroxyphosphonoacetic acid. 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/46C08G65/40
CPCC08G65/4012C08G65/46C08G2650/40
Inventor 李光辉贾远超张泰铭孙庆民王荣海薛居强黄桂青李云龙
Owner SHANDONG KAISHENG NEW MATERIALS