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Technology process for producing bromide using concentrated seawater

A process method, the technology of concentrated seawater, applied in the direction of bromine/hydrogen bromide, etc., can solve the problems of waste of resources, corrosion of equipment, low process yield, etc., and achieve the effect of reducing raw material consumption, increasing blowing rate, and improving acquisition rate

Active Publication Date: 2007-10-03
天津海晶科技发展有限公司
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Problems solved by technology

At present, the bromine extraction process generally adopts the open-type acid bromine extraction process. This process has low yield, serious waste of resources, and the installation is huge, which is not conducive to maintenance. It corrodes the equipment and pollutes the environment
[0003] Although the total amount of bromine in seawater is rich, its unit content is very low, which is basically a trace amount. It is economically unreasonable to directly use seawater as raw material to produce bromine. Therefore, the traditional process generally uses the concentrated brine produced in the process of salt production or seawater desalination. Bromine production as raw material
However, with the development of urban construction, the advantages of land resources are gradually weakening, and the traditional production process of natural solar evaporation and concentration to produce concentrated brine will gradually be eliminated

Method used

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  • Technology process for producing bromide using concentrated seawater

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Embodiment Construction

[0014] The process of using the process for producing bromine by using concentrated seawater of the present invention will be described in conjunction with the accompanying drawings and embodiments.

[0015] The technical method of utilizing concentrated seawater to produce bromine of the present invention, main chemical reaction in its technological process has:

[0016] Oxidation reaction of bromide ions in concentrated seawater: 2Br - +Cl 2 ——→Br 2 +2Cl -

[0017] Bromine absorption reaction in air: Br 2 +SO 2 +2H 2 O——→2HBr+H 2 SO 4

[0018] Oxidation reaction of bromide ion in distillation: 2HBr+Cl 2 ——→Br 2 +2HCl

[0019] The process for producing bromine by using concentrated seawater of the present invention uses the concentrated seawater in the seawater salt production process as the raw material, or the concentrated seawater after seawater desalination is used as the raw material, blows out with air, absorbs sulfur dioxide, and produces bromine in a close...

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Abstract

A process for preparing bromine from concentrated seawater includes such steps as acidifying, oxidizing, air blowing-out, SO2 absorbing and distilling.

Description

technical field [0001] The invention relates to a process for producing bromine, in particular to a process for producing bromine by using concentrated seawater to produce bromine by blowing out sulfur dioxide with air and absorbing tail gas in a closed cycle. Background technique [0002] Bromine is an important chemical raw material. Bromine is widely used in flame retardant, fire extinguishing agent, refrigerant, photosensitive material, medicine, pesticide, oil field and other industries. At present, the bromine extraction process generally adopts the open-type acid bromine extraction process. This process has low yield, serious waste of resources, and the installation is huge, which is not conducive to maintenance. It corrodes the equipment and pollutes the environment. [0003] Although the total amount of bromine in seawater is rich, its unit content is very low, which is basically a trace amount. It is economically unreasonable to directly use seawater as raw materi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/09
Inventor 张德强金广俊刘文斌李萌张佩林杨金水张连军魏炳举
Owner 天津海晶科技发展有限公司
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