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Method of processing polybutadiene polymer industrial waste water

A technology for polybutadiene and wastewater treatment, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as waste, achieve the effects of increasing production rate, reducing COD value, and reducing wastewater discharge

Inactive Publication Date: 2003-12-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking an ABS resin plant with an annual output of 50,000 tons as an example, in the production process of polybutadiene graft copolymers, the polybutadiene polymerization kettle needs to be cleaned once every 10 batches of polymerization, and the total annual drainage is about 2,000 tons. The average component content is 0.8%. The grafting kettle needs to be cleaned once every 8 batches of graft polymerization. The annual discharge is about 4800 tons, and the average latex component is 1.5%. a waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Use polybutadiene latex polymerization kettle washing water for graft polymerization process: polybutadiene latex polymerization kettle washing water (including polybutadiene latex degassing tank washing water) enters polybutadiene latex wastewater storage tank , Determination of the polybutadiene latex content in the storage tank wastewater. The polybutadiene latex and the water content in the kettle washing water are used to replace part of the polybutadiene latex and the water content in the grafting process to carry out graft polymerization. In the graft polymerization production process, the latex content in waste water accounts for 1.0% of the total polybutadiene latex, and the graft polymer is coagulated, centrifugally dried, and then blended with APH-SAN and auxiliary agents to obtain ABS resin. Its melt flow rate is 2.20g / 10min, Vicat softening point is 96°C, bending yield strength is 64.3MPa, tensile yield strength is 44.4MPa, Izod impact strength is 276.7J / m,...

Embodiment 2

[0015] Coagulation technology is used to recover the polybutadiene graft copolymer in the washing water of the polybutadiene graft polymerization kettle: the washing water of the graft polymerization kettle is filtered and then enters the waste water storage tank of the graft polymerization kettle. In the coagulation production process, The polybutadiene grafted latex and the water content in the kettle washing water are used to replace the polybutadiene grafted latex and the water content in the partial coagulation process to coagulate, wherein 1.5% of the graft polymerization kettle washing water with a solid content of 1.5% is added, and the washing kettle water accounts for the coagulation The total water content is 3.0%, the condensation temperature is 68°C, and the curing temperature is 92°C. The melt flow rate of the ABS resin blended with the grafted powder and APH-SAN after coagulation is 1.77g / 10min, the Vicat softening point is 96.5°C, the bending yield strength is 6...

Embodiment 3

[0018] Use polybutadiene latex polymerization kettle washing water for graft polymerization process: polybutadiene latex polymerization kettle washing water (including polybutadiene latex degassing tank washing water) enters polybutadiene latex wastewater storage tank , Determination of the polybutadiene latex content in the storage tank wastewater. Use the polybutadiene latex and water content in the still water to replace part of the polybutadiene latex and water in the grafting process to carry out graft polymerization. In the graft polymerization production process, the latex content in the waste water accounts for the total amount of polybutadiene latex 0.8%. At the same time, coagulation technology is used to reclaim the polybutadiene graft copolymer in the washing water of the polybutadiene graft polymerization kettle: the washing water of the graft polymerization kettle enters the waste water storage tank of the graft polymerization kettle. The polybutadiene grafted l...

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Abstract

The present invention provides the treating process of technological waste water from the production of grafted polybutadiene for ABS resin. Waste water after washing polybutadiene polymerizing reactor and waste water after washing polybutadiene grafting and polymerizing reactor are treated separately to reuse the effective components and lower the COD value of waste water. The waste water treating process can reduce the water treating load in subsequent water treatment, utilize useful material in waste water and raise yield of product.

Description

technical field [0001] The invention relates to a polybutadiene polymer process wastewater treatment method, in particular to a polybutadiene graft copolymer process wastewater treatment method in the process of producing ABS resin. Background technique [0002] Polybutadiene graft copolymer is an intermediate product in the production of ABS resin. Its production process and wastewater discharge status are as follows: using butadiene as raw material, polybutadiene latex (EBR latex) is obtained by emulsion polymerization, and polybutadiene latex is grafted with styrene and acrylonitrile to prepare polybutadiene latex. Diene grafted latex and polybutadiene grafted latex are coagulated, centrifugally washed and dried to obtain polybutadiene grafted copolymer. The graft copolymer is blended with SAN to obtain ABS resin. In the production process of polybutadiene graft copolymer, there are four streams of waste water discharged, which are polybutadiene polymerization tank wash...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 刘发强潘新明管位农乔彤森刘光利
Owner PETROCHINA CO LTD
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