Method for preparing hydrobromic acid and sodium bromide from bromine-containing brine in short process

A hydrobromic acid and short-process technology, applied in the direction of bromine/hydrogen bromide, hydrogen bromide, alkali metal bromide, etc., can solve the problems of low utilization rate of raw materials, reduce energy consumption, simplify preparation steps, and reduce pollution The effect of sexual exhaust gas generation

Pending Publication Date: 2020-06-16
EAST CHINA UNIV OF SCI & TECH +1
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  • Claims
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Problems solved by technology

As a chemical product with great development potential, there are some problems in the production process of hydrobromic acid, such as the low utilization rate of raw materials in the production process, energy saving and emission reduction, environmental protection and other aspects need to be further improved

Method used

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  • Method for preparing hydrobromic acid and sodium bromide from bromine-containing brine in short process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A kind of method for preparing hydrobromic acid and sodium bromide by bromine-containing brine short process

[0025] Take 100L raw material brine containing bromine 950mg / L, put it in a 150L oxidation reactor, add sulfuric acid, hydrochloric acid or nitric acid under normal temperature conditions, adjust the pH value between 0-6.5, blow in chlorine gas under acidic conditions, The chlorine gas flow rate is 5L / min, bromide ions are oxidized into bromine simple substance.

[0026] The oxidized bromine-containing raw material liquid enters the blowing tower from the top of the blowing tower (diameter 60mm, height 1500mm) through the spraying device. The liquid ratio is 100, and the countercurrent contact with the bromine-containing raw material liquid is carried out to desorb the free bromine in the gaseous state. The air carrying gaseous free bromine enters the absorption tower (diameter 60mm, height 1500mm), contacts with the absorption lye in countercurr...

Embodiment 2

[0029] Embodiment 2: a kind of method that bromine-containing brine short process prepares hydrobromic acid and sodium bromide

[0030] Get 100L of raw material brine containing bromine 950mg / L, place it in a 150L oxidation reactor, under normal temperature conditions, add sulfuric acid, adjust the pH value to be controlled between 0-6.5, blow in chlorine gas under acidic conditions, and the gas flow rate of blowing in chlorine gas is 10L / min, bromide ions are oxidized into bromine simple substance.

[0031] The oxidized bromine-containing raw material liquid enters the blow-out tower from the top of the blowing tower (diameter 60 mm, height 1500 mm) through a spray device, and at the same time, air enters the blowing tower from the bottom of the tower through a blower, and carries out countercurrent contact with the bromine-containing raw material liquid. The gaseous free bromine is decomposed. The air carrying gaseous free bromine enters the absorption tower (diameter 60mm,...

Embodiment 3

[0034] Embodiment 3: A kind of method for preparing hydrobromic acid and sodium bromide in short process of bromine-containing brine

[0035] Take 100L raw material brine containing bromine 950mg / L, place it in a 150L oxidation reactor, add hydrochloric acid at 30°C, adjust the pH value to 3, and bubble chlorine gas under acidic conditions at a flow rate of 10L / min, bromide ions are oxidized to simple bromide.

[0036] The oxidized bromine-containing raw material liquid enters the blow-out tower from the top of the blowing tower (diameter 60 mm, height 1500 mm) through a spray device, and at the same time, air enters the blowing tower from the bottom of the tower through a blower, and carries out countercurrent contact with the bromine-containing raw material liquid. The gaseous free bromine is decomposed. The air carrying gaseous free bromine enters the absorption tower (diameter 60mm, height 1500mm), contacts with the absorption lye in countercurrent or cocurrent contact a...

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Abstract

The invention belongs to the field of resource utilization of bromine-containing brine such as salt lakes, seawater, underground brine, industrial wastewater and the like, and particularly provides amethod for preparing hydrobromic acid and sodium bromide from bromine-containing brine in a short process. The technological process mainly comprises the steps of bromine-containing brine oxidation, alkaline solution absorption, hydrobromic acid preparation through distillation, sodium bromide preparation through crystallization, and the like. The technology provides a brand-new process scheme forpreparing hydrobromic acid and sodium bromide by extracting bromine from brine, and compared with a traditional process, the process flow is greatly shortened, the process is simple, industrialization is easy, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of resource utilization of bromine-containing brine such as salt lakes, seawater, underground brine, industrial waste water, etc., and relates to a short-process technology for preparing hydrobromic acid and sodium bromide from bromine-containing brine. This technology provides a brand-new process scheme for preparing hydrobromic acid and sodium bromide by extracting bromine from brine, which mainly includes oxidation of bromine-containing brine, absorption of alkaline solution, distillation to prepare hydrobromic acid, and crystallization to prepare sodium bromide. Background technique [0002] As an important chemical raw material, bromine is widely used in fine chemical industry, medicine, agriculture, military industry and other fields. The raw materials for bromine production mainly come from seawater, underground brine and salt lake brine. At present, the main production methods of bromine include: air blowing m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/09C01D3/10
CPCC01B7/093C01D3/10
Inventor 孙玉柱宋兴福于建国袁纯怡胡秋滨尚小英
Owner EAST CHINA UNIV OF SCI & TECH
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