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Product purification treatment process for polyphenylene sulfide production

A technology of polyphenylene sulfide and treatment process, which is applied in the field of polyphenylene sulfide resin product purification, can solve the problem of increasing the chance of contact between product particles and the environment, and does not describe the process flow and process control method of polyphenylene sulfide resin purification, etc. question

Inactive Publication Date: 2014-04-02
SICHUAN DEYANG ENG PLASTIC DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using such a multi-station processing method increases the chance of product particles in contact with the environment, which increases the chance of contamination and affects the performance of the product
[0004] A puzzling polyphenylene sulfide resin purification process is introduced in Chinese patent application number CN03117749.2, in which neither the process flow nor the process control method of polyphenylene sulfide resin purification is described

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] After the polyphenylene sulfide mixture synthesized by the polymerization reaction was filtered while it was hot, 1 kg of the polyphenylene sulfide resin mixture was weighed into the reaction kettle, and 4 kg of N-methylpyrrolidone solvent was added for washing to make the polyphenylene sulfide resin solid in NMP The content is 20%wt of NMP solvent. Then under the protection of nitrogen, the temperature of the reactor was heated to 130°C, kept for 30 minutes, and finally filtered while hot at this temperature; repeated treatment like this three times. The filter cake that obtains is added in the reactor again, and 7.5kg is added the mixed solution that contains α-chloronaphthene as 60%wt, water is 35%wt, N-methylaminobutyric acid sodium is 5%wt, then makes the solution system The content of phenylene sulfide resin is 12%wt, and then under the protection of nitrogen, the temperature of the reactor is heated to 120°C, kept for 40min, and finally filtered while hot at this...

Embodiment 2

[0014] After the polyphenylene sulfide mixture synthesized by the polymerization reaction was filtered while it was hot, 1 kg of the polyphenylene sulfide resin mixture was weighed into the reaction kettle, and 2.3 kg of N-methylpyrrolidone solvent was added for washing, so that the polyphenylene sulfide resin in NMP The solids content was 30%wt of the NMP solvent. Then under the protection of nitrogen, the temperature of the reactor was heated to 120°C, kept for 40 minutes, and finally filtered while hot at this temperature; repeated treatment like this three times. The filter cake that obtains is added in the reactor again, and 7.5kg is added the mixed solution that contains α-chloronaphthene as 60%wt, water is 35%wt, N-methylaminobutyric acid sodium is 5%wt, then makes the solution system The content of phenylene sulfide resin is 12%wt. Then, under the protection of nitrogen, the temperature of the reactor is heated to 130°C, kept for 30 minutes, and finally filtered while ...

Embodiment 3

[0016] After the polyphenylene sulfide mixture synthesized by the polymerization reaction was filtered while it was hot, 1 kg of the polyphenylene sulfide resin mixture was weighed into the reaction kettle, and 3 kg of N-methylpyrrolidone solvent was added for washing to make the polyphenylene sulfide resin solid in NMP The content is 25%wt of NMP solvent. Then, under the protection of nitrogen, the temperature of the reactor was heated to 125°C, kept for 35 minutes, and finally filtered while hot at this temperature; repeated treatment like this three times. The filter cake that obtains is added in the reactor again, and 7.5kg is added the mixed solution that contains α-chloronaphthene as 60%wt, water is 35%wt, N-methylaminobutyric acid sodium is 5%wt, then makes the solution system The content of phenylene sulfide resin is 12%wt. Then, under the protection of nitrogen, heat the temperature of the reactor to 125°C, keep it warm for 35min, and finally filter while hot at this ...

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PUM

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Abstract

The invention discloses a product purification treatment process for polyphenylene sulfide production. A polyphenylene sulfide resin is produced from raw materials sodium sulfide and paradichlorobenzene. The process is characterized by comprising the following steps of: filtering and separating a polyphenylene sulfide resin product mixture in a reaction system after condensation polymerization is finished, purifying a separated filter cake by using N-methyl-2-pyrrolidone (NMP) and a mixed solution containing 60 weight percent of alpha-chloronaphthalene, 35 weight percent of water and 5 weight percent of N-methylamino sodium butyrate for three times, performing refluxing and washing for 30 to 60 minutes by using a sodium acetate-containing aqueous solution, performing secondary washing and filtering, performing washing for 6 to 8 times by using de-ionized water, and drying the product for 6 to 8 hours in air at 130 to 150 DEG C to obtain a high-purity polyphenylene sulfide resin. By the process, product pollution caused by multi-station operation can be avoided, and unnecessary energy loss is reduced.

Description

technical field [0001] The invention belongs to the field of purification of polyphenylene sulfide resin products. Background technique [0002] The good mechanical and electrical properties of polyphenylene sulfide (PPS) make it the preferred synthetic material in many important occasions. The purity of polyphenylene sulfide has a great influence on the performance of its products. For example, in some electrical applications, the dust contained in polyphenylene sulfide monomer will also have a significant impact on the electrical properties of its products. Therefore, how to prepare high-purity polyphenylene sulfide monomer has always been a concern of the world chemical industry. [0003] At present, sodium sulfide and p-dichlorobenzene (P-DCB) are used as raw materials to polycondense polyphenylene sulfide (PPS) monomers under the action of alkali metal catalysts. In the purification stage of monomer products, generally After filtration and separation, the monomer part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/02C08G75/0213C08G75/0254C08G75/0281
Inventor 刘文良苟梁武徐伟
Owner SICHUAN DEYANG ENG PLASTIC DEV