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Polyphenylene sulfide production waste water recycling method

A technology for the production of wastewater and polyphenylene sulfide, which is applied in chemical instruments and methods, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as inability to utilize resources, and achieve the effect of realizing the resource utilization of wastewater

Inactive Publication Date: 2017-09-01
JIANGSU LONGCHANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through this treatment method, only discharge treatment can be carried out, and resource utilization cannot be carried out.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The resource utilization method of polyphenylene sulfide production wastewater in this embodiment, the method includes the following steps:

[0015] (1) First take 200kg of polyphenylene sulfide production wastewater, heat and stir the polyphenylene sulfide production wastewater in a 70°C water bath for 30 minutes, then adjust the pH to 2.5 with hydrochloric acid with a concentration of 25% by mass, and keep warm at the reaction temperature of 0.7 After h, then divide 10 batches and add the mixed solution of the ferrous sulfate solution and the hydrogen peroxide that the substance mass ratio is 1:18~24, the adding amount of each mixed solution is 0.1% of the weight of polyphenylene sulfide production waste water, sulfuric acid Continue to keep warm for 0.8h after the ferrous solution and hydrogen peroxide are added;

[0016] (2) Next, add sodium hydroxide to the production wastewater treated in step (1) to adjust the pH to 8.2, and then cool down to 19°C for suction fil...

Embodiment 2

[0018] The resource utilization method of polyphenylene sulfide production wastewater in this embodiment, the method includes the following steps:

[0019] (1) First take 200kg of polyphenylene sulfide production wastewater, heat and stir the polyphenylene sulfide production wastewater in a 72°C water bath for 60 minutes, then adjust the pH to 2.7 with 30% hydrochloric acid by mass percent, and keep it warm at the reaction temperature for 1 hour Finally, add in 8 batches the mixed solution of ferrous sulfate solution and hydrogen peroxide with a material mass ratio of 1:18~24, and the addition amount of each mixed solution is 1% of the weight of polyphenylene sulfide production wastewater, and the ferrous sulfate Continue to keep warm for 1 hour after the addition of iron solution and hydrogen peroxide;

[0020] (2) Next, add sodium hydroxide to the production wastewater treated in step (1) to adjust the pH to 8.0, and then cool down to 18°C ​​for suction filtration. The filte...

Embodiment 3

[0022] The resource utilization method of polyphenylene sulfide production wastewater in this embodiment, the method includes the following steps:

[0023] (1) First take 200kg of polyphenylene sulfide production wastewater, heat and stir the polyphenylene sulfide production wastewater in a 68°C water bath for 45 minutes, then adjust the pH to 2.3 with 20% hydrochloric acid by mass percent, and keep warm at the reaction temperature for 0.5 After h, then divide 9 batches and add the mixed solution that is the ferrous sulfate solution of 1:18 and hydrogen peroxide, the addition of each mixed solution is 0.6% of polyphenylene sulfide production waste water weight, ferrous sulfate Continue to keep warm for 0.5h after adding the solution and hydrogen peroxide;

[0024] (2) Next, add sodium hydroxide to the production wastewater treated in step (1) to adjust the pH to 8.4, and then cool down to 20°C for suction filtration. The filter cake is iron sludge solid waste. Test the filtrat...

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Abstract

The invention relates to a polyphenylene sulfide production waste water recycling method. The method comprises the following steps: (1) collecting a given amount of polyphenylene sulfide production waste water, heating and stirring the polyphenylene sulfide production waste water by utilizing a constant-temperature water bath, then adjusting the pH to be 2.3 to 2.7 by utilizing hydrochloric acid, keeping the temperature for 0.5 to 1h at a reaction temperature, then adding a mixed solution of ferrous sulfate solution and hydrogen peroxide, and after the ferrous sulfate solution and the hydrogen peroxide are added, continuously keeping the temperature for 0.5 to 1h; and (2) adding sodium hydroxide into the production waste water treated in the step (1) to adjust the pH to be 8.0 to 8.4, lowering the temperature to 18 to 20 DEG C, performing the suction filtering, wherein a filter cake is iron cement solid waste, and detecting filtrate. The method has the advantages that the mixed solution of the ferrous sulfate solution and the hydrogen peroxide is used for treating the polyphenylene sulfide production waste water, and process parameters and conditions in the treatment method are strictly controlled, so that the treated waste water can be used as a raw material in a chlor-alkali plant to produce chlorine and caustic soda, and a purpose of recycling the waste water can be realized.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a resource utilization method of polyphenylene sulfide production wastewater. Background technique [0002] The sodium sulfide method is a commonly used production method of polyphenylene sulfide at home and abroad. During the production of polyphenylene sulfide by the sodium sulfide method, a large amount of polyphenylene sulfide production wastewater will be generated, and the polyphenylene sulfide production wastewater has a large amount of water quality fluctuations. , poor biodegradability, complex composition, containing a large amount of benzene rings and heterocyclic organics, and high COD content (COD value can reach 6000-10000mg / L), it is one of the typical difficult-to-treat industrial wastewater. [0003] At present, there is no suitable method to treat polyphenylene sulfide production wastewater at home and abroad, which not only easily pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/38
CPCC02F9/00C02F1/001C02F1/66C02F1/722C02F2103/38C02F2301/08
Inventor 张剑宇丁佐龙佘卫民
Owner JIANGSU LONGCHANG CHEM
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