Method and device for increasing bromine stripping rate and extraction rate in air blowing-out process

A technology of air blowing and extraction rate, which is applied in the direction of bromine, bromine/hydrogen bromide, products, etc., can solve the problems of low stripping rate and overall extraction rate of bromine in the extraction process, so as to improve the recovery rate of purging and reduce the dissolution , Improve the effect of the overall extraction rate

Active Publication Date: 2018-09-14
山东特检科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the technical problem of low stripping rate and overall extraction rate in the process of extracting bromine by the air blowing method, and provide a method for improving the bromine stripping rate and extraction rate of the air blowing method

Method used

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  • Method and device for increasing bromine stripping rate and extraction rate in air blowing-out process
  • Method and device for increasing bromine stripping rate and extraction rate in air blowing-out process
  • Method and device for increasing bromine stripping rate and extraction rate in air blowing-out process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment will show through the simulation experiment that CO passes through the brine before purging. 2 the effect that can be achieved.

[0044] 1. Solution configuration

[0045] Solution 1 (100mL): 10% NaCl, 0.5gNaBr (concentration at this time is 5000mg / L)

[0046] Solution 2: hypochlorous acid solution (containing 0.05% hypochlorous acid)

[0047] 2. Experimental steps

[0048] 2.1) Configure 100mL solution 1, adjust its pH value to 2 with concentrated hydrochloric acid and 1M NaOH solution, and simultaneously adjust the pH value of solution 2 to 2 with concentrated hydrochloric acid and 1M NaOH solution;

[0049] 2.2) Add dropwise solution 2 with the same pH value to solution 1, measure the Eh value of solution 1 with an Eh electrode, stop adding solution 2 when the Eh of the solution is at 950-1000mV, and obtain the completed oxidation solution for simulation . Simultaneously measure its NaBr content. In this step, using Eh and ClO - The correlation...

Embodiment 2

[0064] This embodiment is used to verify the improvement effect of the method of the present invention in the actual bromine air blowing production process.

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Abstract

The invention discloses a method and a device for increasing bromine stripping rate and extraction rate in an air blowing-out process and belongs to the field of bromine extraction. The method specifically includes: feeding CO2 gas into a bromine-containing solution during or before air blowing-out of oxidation completing liquid. Compared with the prior art, the method has the advantages that by feeding CO2 into brine before sweeping, disproportionation reaction can be inhibited, and dissolution of bromine can be reduced, so that sweeping recovery rate of bromine is increased, and final bromine integral extraction rate is increased.

Description

technical field [0001] The invention belongs to the field of bromine extraction, and in particular relates to a method and a device for improving the bromine stripping rate and extraction rate in an air blowing method. Background technique [0002] As an important chemical raw material, bromine is widely used in chemical, pharmaceutical, pesticide and petroleum industries, and plays an important role in the development of my country's national economy and science and technology. my country's bromine production industry accounts for 10% of the world's production capacity, ranking third in the world. [0003] The extraction process of bromine mainly includes air blowing method and distillation method. The air blowing method is currently the most mature and commonly used bromine extraction process, which can extract bromine from low-concentration bromine-containing brine (2-4g / L) or brine in the production process of sea salt. The basic principle is: after bromide ions are ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/09
CPCC01B7/096Y02P20/141
Inventor 黄元凤王秋瑾曹怀祥叶瑛秦华伟张平萍
Owner 山东特检科技有限公司
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