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Method and device for recovering oligomers for polyphenylene sulfide production

A recovery method and polyphenylene sulfide technology, applied in the field of chemical production, can solve the problems of lack of convenient operation, low cost and efficient method, and achieve the effects of reducing cost, avoiding impact and reducing emissions

Pending Publication Date: 2020-10-13
CHONGQING JUSHI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, the recovery of polyphenylene sulfide oligomers is necessary in terms of environmental protection and cost control, but there is currently a lack of easy-to-operate, low-cost and efficient methods

Method used

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  • Method and device for recovering oligomers for polyphenylene sulfide production
  • Method and device for recovering oligomers for polyphenylene sulfide production
  • Method and device for recovering oligomers for polyphenylene sulfide production

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Embodiment

[0037] combine Figure 1-3 Shown, a kind of polyphenylene sulfide production oligomer recovery method comprises the following steps:

[0038] S1: Collect the filtrate and washing liquid and store them in the filtrate mixing storage tank 1 to form a mixed liquid;

[0039] S2: The mixed liquid is pumped into the mixing tube by the mixed liquid pump 2 and filtered to form an oligomer filter cake;

[0040] S3: Collect the oligomer filter cake at the bottom of the mixing tubular filter 3 into a washing mixing tank 5, add washing water to stir and wash, and then enter the first washing tubular filter 7 to filter to form a washing oligomer;

[0041] S4: Collect the first-wash oligomers at the bottom of the first-wash tubular filter 7 into the second-wash mixing tank 8, add washing water to stir and wash, and then enter the second-wash tubular filter 10 to filter to form the second-wash oligomers;

[0042] S5: Collect the secondary-washed oligomers at the bottom of the secondary-was...

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Abstract

The invention discloses a polyphenylene sulfide oligomer recovery method. The method comprises the following steps: S1, collecting a filtrate and a washing liquid, and storing the filtrate and the washing liquid in a filtrate mixing storage tank to form a mixed liquid; S2, pumping the mixed liquid into a mixing filter, and carrying out filtering to form an oligomer filter cake; S3, collecting theoligomer filter cake at the bottom of the mixing filter into a primary-washing stirring tank, adding washing water, carrying out stirring and washing, and allowing the filter cake to enter a primary-washing filter to undergo filtering so as to form a primary-washing oligomer; S4, collecting the primary-washing oligomer at the bottom of the primary-washing filter into a secondary-washing stirring tank, adding washing water, carrying out stirring and washing, and allowing the filter cake to enter a secondary-washing filter to undergo filtering so as to form a secondary-washing oligomer; and S5,collecting the secondary-washing oligomer at the bottom of the secondary-washing filter into a mixing bin, uniformly adding the secondary-washing oligomer into a dryer through a feeder, and performingheating and drying to obtain a recovered oligomer product. According to the method, the oligomer with a certain economic value in the filtrates are recycled through filtering, washing and drying, meanwhile, solid waste emission is reduced, and the environmental protection requirements for energy conservation and emission reduction are met.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method for recovering oligomers used in the production of polyphenylene sulfide. Background technique [0002] Polyphenylene sulfide is abbreviated as PPS in English. It is a new type of high-performance thermoplastic resin with excellent heat resistance, chemical resistance, flame retardancy, mechanical properties, and electrical properties. It can be blended and modified. It is currently used in automobiles, machinery , chemical industry, electronics and aerospace and other collars are widely used. [0003] At this stage, sodium sulfide compression polymerization is the most mature industrial production method of polyphenylene sulfide. A certain amount of oligomers will be generated during the synthesis process, which will be mixed in the synthetic slurry filtrate and the washing and purification liquid of PPS products. Not only will it seriously affect the recov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/0254C08G75/0281
CPCC08G75/0254C08G75/0281
Inventor 吕天生胡洪铭谢晓鸿陈尚敬刘源丹陈晓秋黄国庆
Owner CHONGQING JUSHI NEW MATERIAL TECH CO LTD
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