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Coagulation method of ABS grafted latex for improving biodegradability of process sewage

An agglomeration method and biochemical technology, applied in the coagulation field of ABS grafted latex, can solve the problems of high efficiency/economy of the treatment process, rising cost per ton of sewage treatment, etc., to reduce the content of toxic cyano substances and improve biochemical properties the effect of narrow particle size distribution

Active Publication Date: 2021-09-21
WANHUA CHEM (SICHUAN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth pointing out that with the complexity of the treatment process, the cost per ton of sewage treatment has also increased significantly, and the efficiency / economy of the treatment process still needs to be improved

Method used

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  • Coagulation method of ABS grafted latex for improving biodegradability of process sewage
  • Coagulation method of ABS grafted latex for improving biodegradability of process sewage
  • Coagulation method of ABS grafted latex for improving biodegradability of process sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Get 26kg of ABS grafted latex (317nm, solid content 40.8%), add 100g emulsion antioxidant (Zhejiang Shaofeng Plastic Industry SF-50LX), adopt IKA mechanical stirring to mix and set aside; 318g potassium hydrogen phthalate, Mix 159g of sulfuric acid and an appropriate amount of deionized water (adjust the amount of deionized water added according to the solid content of the target slurry), and prepare a mixed solution for use.

[0050] Nitrogen replacement of the three-tank continuous condensation reactor (see figure 1 process), open the first coagulation kettle, and continuously feed the previously configured mixed solution into the kettle. After the liquid level is established, control the internal temperature of the first coagulation kettle to 74°C, the second coagulation kettle to 90°C, and the second coagulation kettle to 90°C. The internal temperature of the three-condensation tank is 85°C, and the outlet pump flow rate is adjusted to control the residence time of ...

Embodiment 2

[0057] Get 26kg of ABS grafted latex (317nm, solid content 40.8%), add 100g emulsion antioxidant (Zhejiang Shaofeng Plastic Industry SF-50LX), adopt IKA mechanical stirring and mix for use; 106g aminoacetic acid, 74g phosphoric acid and appropriate amount Deionized water (adjust the amount of deionized water added according to the solid content of the target slurry) is mixed evenly and configured as a mixed solution for use.

[0058] Nitrogen replacement of the three-tank continuous condensation reactor (see figure 1 process), open the first coagulation tank, and continuously feed the previously configured mixed solution into the tank. After the liquid level is established, control the internal temperature of the first coagulation tank to 80°C, the second coagulation tank to 85°C, and the second coagulation tank to 85°C. The internal temperature of the three-condensation tank is 85°C, and the outlet pump flow rate is adjusted to control the residence time of each tank to be 1h...

Embodiment 3

[0064] Get 26kg of ABS graft latex (317nm, solid content 40.8%), add 100g emulsion antioxidant (Zhejiang Shaofeng Plastic Industry SF-50LX), adopt IKA mechanical stirring to mix and set aside; 53g hexamethylenetetramine, 318g of hydrochloric acid and an appropriate amount of deionized water (adjust the amount of deionized water added according to the solid content of the target slurry) were evenly mixed, and prepared into a mixed solution for use.

[0065] Nitrogen replacement of the three-tank continuous condensation reactor (see figure 1 process), open the first coagulation tank, and continuously feed the previously configured mixed solution into the tank. After the liquid level is established, control the internal temperature of the first coagulation tank to 65°C, the second coagulation tank to 90°C, and the second The internal temperature of the three-coagulation tank is 85°C, and at the same time, the flow rate of the outlet pump is adjusted to control the residence time ...

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Abstract

The invention discloses a coagulation method of ABS grafted latex for improving biodegradability of process sewage. The method comprises the following steps: 1) adding ABS grafted latex, deionized water, a coagulant and a pH buffer agent into a coagulation kettle, and performing demulsifying and coagulating to obtain ABS grafted powder slurry; and 2) introducing the ABS grafted powder slurry into a curing kettle for further curing, and performing cooling, filtering and drying to obtain an ABS rubber powder. According to the method, the ABS grafted powder can be conveniently and efficiently prepared through continuous coagulation, meanwhile, control over the variety / content of specific pollutants can be achieved, generated process sewage has the higher B / C value, and the method is more suitable for an existing sewage treatment process of flocculation-air flotation slag scraping-biochemical treatment.

Description

technical field [0001] The invention relates to a coagulation method of ABS grafted latex, in particular to a coagulation method of ABS grafted latex which improves the biodegradability of process sewage, and belongs to the technical field of ABS resins. Background technique [0002] According to the synthesis route, ABS resin can be divided into two production processes: emulsion grafting-bulk SAN blending method and bulk method. Among them, the process flow of emulsion grafting-bulk SAN blending method is mainly composed of the following four parts: (1) PBL (polybutadiene latex) is prepared by emulsion polymerization; (2) Emulsion grafting of PBL with styrene and acrylonitrile (3) Styrene and acrylonitrile are copolymerized by bulk polymerization to obtain SAN resin; (4) ABS powder is blended with SAN resin and additives in a certain proportion, Through extrusion and granulation, ABS resin is finally obtained. Since the ABS grafted powder and SAN resin are produced separ...

Claims

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Application Information

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IPC IPC(8): C08C1/15
CPCC08C1/15
Inventor 孙一峰赵国威周兵韩强赵以兵于天勇黎源
Owner WANHUA CHEM (SICHUAN) CO LTD
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