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Application of sodium acetate as catalyst for preparing polyphenylene sulfide and method for preparing polyphenylene sulfide

A technology of polyphenylene sulfide and sodium acetate, which is applied in the field of preparing polyphenylene sulfide, a catalyst for preparing polyphenylene sulfide, and preparing polyphenylene sulfide with N-methylpyrrolidone as a solvent, which can solve high power consumption and solvent loss Large size, few product varieties, etc., to achieve the effect of simple and reliable operation process, reduced recycling cost, and small equipment investment

Active Publication Date: 2014-07-16
重庆瑞淼科技发展中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, China's PPS technology still has problems such as few product varieties, few high-function products, and urgent need to expand production capacity.
[0003] The existing polyphenylene sulfide production technology generally has problems such as high power consumption (more than 10,000 kw h per ton of product), large solvent loss, high catalyst cost, and large fluctuations in product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The method for preparing polyphenylene sulfide in this embodiment uses sodium polyhydrate and p-dichlorobenzene as raw materials, N-methylpyrrolidone as a solvent, and sodium acetate as a catalyst; specifically, it includes the following steps:

[0032] a. According to the mass ratio of 0.9-1.1: 0.25-0.35: 0.008-0.012: 1.6-2.0, take hydrated sodium sulfide, sodium acetate, caustic soda and N-methylpyrrolidone, and add the selected raw materials into the condensation kettle to prepare polyhydric vulcanization sodium solution;

[0033] B, feed nitrogen into the condensation kettle of step a and heat and carry out dehydration to obtain dehydrated sodium sulfide solution;

[0034] c. Take p-dichlorobenzene and dissolve it in N-methylpyrrolidone according to the mass ratio of 0.8 to 1.1:0.9 to 1.05 to obtain a p-dichlorobenzene solution;

[0035] d. Take p-dichlorobenzene solution according to the mass ratio of p-dichlorobenzene solution and dehydrated sodium sulfate soluti...

Embodiment 2

[0044] The method for preparing polyphenylene sulfide in this embodiment uses sodium polyhydrate and p-dichlorobenzene as raw materials, N-methylpyrrolidone as a solvent, and sodium acetate as a catalyst; specifically, it includes the following steps:

[0045] a. According to the mass ratio of 1.1:0.25:0.012:1.6, take hydrated sodium sulfide, sodium acetate, caustic soda and N-methylpyrrolidone, and add the selected raw materials into the condensation kettle to prepare polyhydrate sodium sulfide solution;

[0046] B, feed nitrogen into the condensation kettle of step a and heat and carry out dehydration to obtain dehydrated sodium sulfide solution;

[0047] c. Take p-dichlorobenzene and dissolve it in N-methylpyrrolidone according to the mass ratio of 1.1:0.9 to obtain a p-dichlorobenzene solution;

[0048] d. Take p-dichlorobenzene solution according to the mass ratio of p-dichlorobenzene solution and dehydrated sodium sulfate solution at 0.7:0.9, and add the selected p-dichl...

Embodiment 3

[0057] The method for preparing polyphenylene sulfide in this embodiment uses sodium polyhydrate and p-dichlorobenzene as raw materials, N-methylpyrrolidone as a solvent, and sodium acetate as a catalyst; specifically, it includes the following steps:

[0058] a. According to the mass ratio of 0.9:0.35:0.008:2.0, take hydrous sodium sulfide, sodium acetate, caustic soda and N-methylpyrrolidone, and add the selected raw materials into the condensation kettle to prepare sodium polyhydrate sulfide solution;

[0059] B, feed nitrogen into the condensation kettle of step a and heat and carry out dehydration to obtain dehydrated sodium sulfide solution;

[0060] c. Dissolve p-dichlorobenzene in N-methylpyrrolidone at a mass ratio of 0.8:1.05 to obtain a p-dichlorobenzene solution;

[0061] d. Take p-dichlorobenzene solution according to the mass ratio of p-dichlorobenzene solution and dehydrated sodium sulfate solution at 0.5:1.1, and add the selected p-dichlorobenzene solution into...

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Abstract

The invention discloses application of sodium acetate as a catalyst for preparing polyphenylene sulfide and a method for preparing polyphenylene sulfide from aqueous sodium sulfide and p-dichlorobenzene which are used as raw materials, N-methylpyrrolidone used as a solvent and sodium acetate used as the catalyst. The method comprises the following concrete steps: a, dissolving aqueous sodium sulfide, sodium acetate and caustic soda flakes in N-methylpyrrolidone to obtain an aqueous sodium sulfide solution; b, dehydrating the solution in the step a to obtain a dehydrated sodium sulfide solution; c, dissolving p-dichlorobenzene in N-methylpyrrolidone to obtain a p-dichlorobenzene solution; d, mixing the dehydrated sodium sulfide solution in the step b with the p-dichlorobenzene solution in the step c, and performing polymerization reaction to obtain a reaction product; e, separating the reaction product in the step d to obtain finished polyphenylene sulfide. According to the method for preparing polyphenylene sulfide, acetate is used as the catalyst and the method has the advantage of low cost, and prepared PPS (polyphenylene sulfide) is good in linearity, high in molecular weight and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the field of preparation of organic polymer compounds, and relates to a method for preparing polyphenylene sulfide, in particular to a method for preparing polyphenylene sulfide with sodium sulfide and p-dichlorobenzene as main raw materials and N-methylpyrrolidone as a solvent. Method; The present invention also relates to a catalyst for preparing polyphenylene sulfide. Background technique [0002] Polyphenylene sulfide (PPS) is a special engineering plastic with excellent comprehensive properties. It has the advantages of high mechanical strength, high temperature resistance, chemical resistance, flame retardancy, good thermal stability, and excellent electrical properties. It is widely used as a structural polymer material, and is widely used as a special engineering plastic after filling and modification. At the same time, it can also be made into various functional films, coatings and composite materials, and has been su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/02C08G75/0213C08G75/0254
Inventor 郭汝轩
Owner 重庆瑞淼科技发展中心
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