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Technology for extracting bromine through air blow-out method

An air blowing and process technology, applied in the directions of bromine, bromine/hydrogen bromide, etc., can solve the problems of waste of resources and high bromine, and achieve the effect of reducing waste of resources

Inactive Publication Date: 2015-05-13
TIANJIN CHANGLU HAIJING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, first, it is necessary to add acid to acidify the brine, and second, the blown waste liquid contains high bromine, which will waste resources

Method used

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  • Technology for extracting bromine through air blow-out method

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Embodiment Construction

[0011] Attached below figure 1 The present invention is described further:

[0012] The process flow of this process is as follows:

[0013] First of all, the blowing waste liquid discharged by the air blowing method is inspected, and the bromine content is 40g / m3 3 The pH value is between 3±0.5, and the acidic blown liquid is collected and stored, and then transported to the brine pump through pipelines. Then, chlorine gas is introduced into the outlet pipe of the brine pump to cause redox reaction between bromide ions and chlorine gas in the blown waste liquid, and the oxidative chlorine compounding rate is controlled between 120%-140%, and the bromide ions are oxidized into bromine molecules. Then, the obtained bromine molecules are reduced and absorbed with sulfur dioxide and water to obtain a bromine-containing 50g / l absorption completed liquid, which is used for oxidative distillation to produce bromine.

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Abstract

The invention provides a technology for extracting bromine through an air blow-out method. The technology adopting bromine extracted moderate brine (a blow-out waste liquid) as a raw material comprises the following steps: oxidizing the raw material by adopting chlorine to make bromide ions not extracted from the moderate brine form bromine molecules, carrying out reducing absorption by adopting sulfur dioxide and water to generate an absorption completion solution with the bromine concentration of 50g / l, and carrying out oxidative distillation to prepare bromine. The blow-out waste liquid can be used to extract bromine through the technology, acidification of the raw material liquid is not needed in the technology in order to effectively reduce resource waste, and the blow-out extraction rate reaches 80% or more.

Description

technical field [0001] The invention relates to a production process for extracting bromine by using blowing waste liquid discharged by an air blowing method. Background technique [0002] The current air blowing method uses brine with a bromine content higher than 70g / l. Because the brine is slightly alkaline, sulfuric acid is used to acidify the chlorine to ensure the oxidation effect of chlorine. Between 100% and 130%, when the bromine content of the blown waste liquid is high, it can reach 40g / l. At this time, first, it is necessary to add acid to acidify the brine, and second, the blown waste liquid contains high bromine, which will waste resources. Contents of the invention [0003] The present invention is a production process for extracting bromine from the blown waste liquid discharged by the air blowing method, that is, moderate brine. Chlorine gas is oxidized to oxidize bromide ions that have not been raised in moderate brine to bromine molecules, and then und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/09
CPCC01B7/096
Inventor 宋明峰田凤麟杨金水张连军李长岭
Owner TIANJIN CHANGLU HAIJING GRP CO LTD