Method for effectively reducing metal content in polyetheretherketone

A technology of polyetheretherketone and purification method, applied in the field of purification of polyetheretherketone, can solve the problems such as the inability to significantly reduce the metal content of polyetheretherketone, the inability to remove other metal elements, and the increase of the cost of polyetheretherketone resin. , to achieve the effect of easy operation, low price and low processing cost

Active Publication Date: 2009-07-22
JILIN ZHONGYAN HIGH PERFORMANCE PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method using organic solvents and surfactants can only remove heteroions such as sodium, potassium, chlorine, fluorine, and sulfate in polyether ether ketone, but cannot remove other metal elements, and it is harmful to human health to use Washing with acetone, repeated washing also caused the loss of polyetheretherketone resin, and further increased the cost of polyetheretherketone resin
Some also use the method of filtration and absorption, but none of the above methods can significantly reduce the content of metals in polyetheretherketone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1.4ml of concentrated hydrochloric acid with a mass percentage concentration of 37% of analytical purity, add distilled water to 500ml, and prepare a hydrochloric acid solution with a mass percentage concentration of 0.1%, and pour the hydrochloric acid solution into a 1000ml three-necked flask. Weigh 20 grams of polyether ether ketone particles with a diameter of 0.1 mm to 5 mm that have undergone conventional post-treatment, add them to the above three-necked flask filled with hydrochloric acid solution, and purify at normal temperature and pressure for 2 hours under stirring ; Centrifuge the mixture of polyether ether ketone particles and hydrochloric acid to dehydrochloride, then wash with 500ml distilled water and centrifuge several times until the washing liquid is neutral. Then, the above-treated polyetheretherketone was dried at 100° C. for 4 hours under normal pressure to obtain a polyetheretherketone product with significantly reduced metal content.

Embodiment 2

[0023] Take analytically pure concentrated hydrochloric acid with a concentration of 37% in mass percent, add distilled water to 500ml, and prepare a hydrochloric acid solution with a concentration of 20% in mass percent, and pour the hydrochloric acid solution into a 1000ml three-necked flask. Weigh 20 grams of polyether ether ketone particles with a diameter of 0.1 mm to 5 mm that have undergone conventional post-treatment, add them to the above three-necked flask filled with hydrochloric acid solution, and purify at normal temperature and pressure for 2 hours under stirring ; Centrifuge the mixture of polyether ether ketone particles and hydrochloric acid to dehydrochloride, then wash with 500ml distilled water and centrifuge several times until the washing liquid is neutral. Then, the above-treated polyetheretherketone was dried at 100° C. for 4 hours under normal pressure to obtain a polyetheretherketone product with significantly reduced metal content.

Embodiment 3

[0025] Get the concentrated hydrochloric acid 500ml that the mass percentage concentration of analytical grade is 37%, it is poured in the 1000ml three-neck flask. Weigh 20 grams of polyether ether ketone particles with a diameter of 0.1 mm to 5 mm that have undergone conventional post-treatment, add them to the above three-necked flask filled with hydrochloric acid solution, and purify at normal temperature and pressure for 2 hours under stirring ; Centrifuge the mixture of polyether ether ketone particles and hydrochloric acid to dehydrochloride, then wash with 500ml distilled water and centrifuge several times until the washing liquid is neutral. Then the polyetheretherketone treated above was dried at 100° C. for 4 hours to obtain a polyetheretherketone product with significantly reduced metal content.

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PUM

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Abstract

The invention relates to a method for effectively reducing the metal content in a polyetheretherketone at normal temperature and pressure. The method mainly comprises purification, centrifugation, washing, and drying. The invention uses hydrochloric acid as purification agent and adds the polyetheretherketone particles into hydrochloric acid solution with certain concentration; after the purification treatment is finished and the centrifugation hydrochloric acid removal is carried out, and then the distilled water is washed to neutral and dried; and polyetheretherketone particles of high quality can be obtained. The method not only can effectively reduce the metal content in the polyetheretherketone and does not change the physical and chemical properties of the polyetheretherketone, but also has the advantages of simple process, easily-fetched raw material, no need of temperature and pressure increase, and low cost.

Description

1. Technical field: [0001] The invention belongs to the technical field of polyether ether ketone (PEEK) purification, and in particular relates to a method for purifying polyetheretherketone at normal temperature and pressure, thereby significantly reducing the metal content in polyether ether ketone. 2. Background technology: [0002] Polyetheretherketone (PEEK) is a new type of aromatic thermoplastic engineering plastics with excellent physical and mechanical properties. In many special fields, it can replace traditional materials such as metals and ceramics, and has made outstanding contributions to reducing weight and improving performance, and has become one of the most popular high-performance engineering plastics today. [0003] Today, polyether ether ketone has been widely used in aerospace, automobile manufacturing, electrical and electronic, industrial, medical and other fields, and plays an irreplaceable role in these fields. Because the directly produced polyet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/02
Inventor (请求不公开姓名)
Owner JILIN ZHONGYAN HIGH PERFORMANCE PLASTIC
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