Method and device for producing bromine from brominated butyl rubber wastewater through steam distillation

A technology of bromobutyl rubber and bromine vapor, which is applied in the direction of bromine/hydrogen bromide, can solve the problems of environmental pollution, repair resource waste, etc., and achieve the effect of prolonging the cleaning cycle, reducing enterprise costs, and increasing surface smoothness

Inactive Publication Date: 2014-12-24
ENG TECH INST CO LTD OF CNSIC
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Problems solved by technology

The bromine content in the wastewater discharged from the bromobutyl rubber production plant reaches 8g/l. If the wastewater is d...

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  • Method and device for producing bromine from brominated butyl rubber wastewater through steam distillation

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Experimental program
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Embodiment Construction

[0022] Such as figure 1 Shown:

[0023] Wastewater from the production of bromobutyl rubber first enters the preheater 1 for preheating, and then enters the distillation tower 2 from the top, while chlorine and steam enter the distillation tower 2 from the bottom, and the bromine vapor obtained after the reaction is composed of part of water vapor and chlorine The crude bromine vapor enters the bromine steam condenser 3 together, and the liquid after being condensed by cooling water enters the bromine water separator 4, and bromine and bromine water are separated in the separator, and the bromine water returns to the middle part of the distillation tower 2, and the crude bromine after separation Enter the next rectification process from the separator, and the non-condensable gas enters the non-condensable gas condenser 12 . The crude bromine obtained after being separated from the bromine water separator 4 enters from the top of the primary rectification tower 5 . After the ...

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Abstract

The invention relates to a method and a device for producing bromine from brominated butyl rubber wastewater through steam distillation. The device comprises a preheater (1), a distillation tower (2), bromine steam condensers (3), a bromine-water separator (4), a primary bromine distillation tower (5), primary bromine condensers (6), a secondary bromine distillation tower (7), a secondary bromine condenser (8), a tertiary bromine distillation tower (9), a tertiary bromine condenser (10), a fine bromine condenser (11), non-condensable gas condensers (12) and a chlorine gas recovery tower (13). The method and the device for producing bromine through steam distillation are adopted to treat wastewater in brominated butyl rubber production, more than 90% of bromine is recovered, drained wastewater reaches the standard, and an enterprise is environmental-friendly; and meanwhile, recovered bromine can be used as a raw material for brominated butyl rubber production of the enterprise, so that the enterprise cost is reduced, and the economic benefit is increased.

Description

technical field [0001] The invention relates to a method and a device for producing bromine by steam distillation of brominated butyl rubber waste water. Background technique [0002] With the continuous development of the halogenated butyl rubber industry, the problem of wastewater treatment, especially the wastewater produced in the production of bromobutyl rubber, has become more and more prominent. The bromine content in the wastewater discharged from the bromobutyl rubber production plant reaches 8g / l. If the wastewater is discharged directly, it will cause serious pollution to the environment and cause a waste of repair resources, so it must be treated. According to the physical and chemical characteristics of bromine, bromine can be recovered by extraction and distillation. According to the experimental research, the recovery rate of bromine in the extraction process can reach 75%, while the recovery rate of bromine in the steam distillation process can reach more tha...

Claims

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Application Information

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IPC IPC(8): C01B7/09
Inventor 周秀云刘长岩赵淑芳孟兴智
Owner ENG TECH INST CO LTD OF CNSIC
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