Comprehensive utilization method of waste water of production of brominated butyl rubber

A technology of bromobutyl rubber and production wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult discharge and high salinity of production wastewater, and achieve High utilization efficiency, simple method, and the effect of solving the difficult discharge of high-concentration sodium bromide-containing wastewater

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a comprehensive utilization method of brominated butyl rubber production wastewater to solve the problem that the brominated butyl rubber production wastewater is difficult to discharge due to high salinity

Method used

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  • Comprehensive utilization method of waste water of production of brominated butyl rubber
  • Comprehensive utilization method of waste water of production of brominated butyl rubber

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Experimental program
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Effect test

Embodiment 1

[0022] Under the condition of operating pressure of 2.0MPa, the bromobutyl rubber production wastewater with a sodium bromide mass concentration of 1.08% was subjected to reverse osmosis concentration treatment using a coiled membrane module equipped with an aromatic polyamide composite membrane to obtain sodium bromide A concentrated solution with a mass concentration of 10.5%; dissolve sodium hypochlorite in the above concentrated solution to form a mixed sterilizing solution, control the mixing molar ratio of the concentrated solution (calculated as bromine) and sodium hypochlorite (calculated as chlorine) to 1:0.5, and use the mixed sterilizing solution The dynamic simulation test was carried out, and the dosing concentration and results are shown in Table 2.

Embodiment 2

[0024] Under the condition of an operating pressure of 8.0MPa, the bromobutyl rubber production wastewater with a sodium bromide mass concentration of 0.95% was subjected to reverse osmosis concentration treatment by using a coiled membrane module equipped with a polysulfone composite membrane to obtain the mass concentration of sodium bromide A concentrated solution with a concentration of 14.7%; trichloroisocyanuric acid is dissolved in the above concentrated solution to form a mixed sterilizing solution, and the mixing molar ratio of the concentrated solution (calculated as bromine) to trichloroisocyanuric acid (calculated as chlorine) is controlled The ratio is 1:1, and the dynamic simulation test is carried out with the mixed bactericidal solution. The dosage concentration and the results are shown in Table 2.

Embodiment 3

[0026] Under the conditions of operating temperature of 50°C and pressure of 8KPa, the bromobutyl rubber production wastewater with a mass concentration of sodium bromide of 1.22% was concentrated by membrane distillation using a flat-plate membrane module equipped with a polytetrafluoroethylene hydrophobic membrane. , to obtain a concentrated solution with a sodium bromide mass concentration of 12.3%; dissolve sodium dichloroisocyanurate in the above concentrated solution to form a mixed sterilizing solution, and control the concentration (in terms of bromine) and sodium dichloroisocyanurate ( The mixing molar ratio (calculated as chlorine) is 1:1.2, and the dynamic simulation test is carried out with the mixed sterilizing solution, and the dosage concentration and results are shown in Table 2.

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Abstract

The invention relates to a comprehensive utilization method of waste water of the production of brominated butyl rubber, comprising the following steps in sequence: a) condensing the waste water of the production of brominated butyl rubber to allow the mass concentration of sodium bromide in the condensed waste water to be at least 10 %; b) mixing the condensed waste water with a chlorine-containing bactericide, wherein, the chlorine-containing bactericide comprises at least one chlorine-containing bactericide capable of producing hypochloric acid in water; and c) adding the mixed solution inindustrial recirculated cooling water to keep the concentration of germicidal active ingredient in the recirculated cooling water be 0.1-0.5 mg / L measured as residual chlorine. According to the invention, hypobromous acid having good sterilization performance and strong adaptability produced by mixing sodium bromide in the waste water with the chlorine-containing bactericide is used as a bactericide to carry out sterilization on the recirculated cooling water, thus on one hand, the sterilization effect of the recirculated cooling water system can be reinforced, on the other hand, sodium bromide in the waste water can be effectively utilized, so that the purpose of comprehensive utilization is achieved; simultaneously, the problems of difficult discharge of high concentration sodium bromide-containing waste water generated in the production of brominated butyl rubber can be solved, and secondary pollution can not be generated.

Description

technical field [0001] The invention relates to a comprehensive utilization method of wastewater, in particular to a comprehensive utilization method of brominated butyl rubber production wastewater. Background technique [0002] Bromobutyl rubber (BIIR) is the product of the bromination of butyl rubber. Compared with ordinary butyl rubber, brominated butyl rubber has fast vulcanization speed, strong adaptability, good compatibility with natural rubber and styrene-butadiene rubber, and improved bonding performance with natural rubber and styrene-butadiene rubber. It can be vulcanized by zinc oxide alone, and has good heat resistance. It is an irreplaceable raw material for the manufacture of radial tire inner tubes and tubeless tires. [0003] In the process of producing bromobutyl rubber, waste water containing a large amount of sodium bromide will be produced, and its mass percentage concentration is generally greater than 1%. Bromobutyl rubber manufacturers abroad are m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 王岽郦和生魏新谢文州李博伟
Owner CHINA PETROLEUM & CHEM CORP
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