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Preparation method for sodium bromide

A sodium bromide blowing out tower technology, which is applied in the field of sodium bromide preparation, can solve the problems of bromine air and water temperature, cumbersome process, incomplete absorption, etc., and achieve high absorption efficiency, simplified process, and sufficient absorption effect

Active Publication Date: 2016-12-07
SHANDONG HAIWANG CHEM
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to provide a kind of bromine that utilizes the brine after potassium extraction to carry out in view of the disadvantages of the prior art that the process is relatively cumbersome, bromine is greatly affected by air temperature and water temperature when the air is blown out, and the absorption is not thorough. Sodium chloride preparation method

Method used

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  • Preparation method for sodium bromide

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Embodiment 1

[0028] Such as figure 1 As shown, take the brine containing bromine at room temperature, generally use the brine after the potassium element is extracted, first add hydrochloric acid or sulfuric acid for acidification, and the pH value will reach 3.5-4.0, and then add chlorine for oxidation, and transport to a closed container for static mixing Fully oxidized in the device, and then use the brine pump to transport the fully oxidized material to the top of the blowing tower. The oxidized brine is sprayed from the top of the blowing tower, and contacts the surface of the packing in the tower together with the circulating gas in the tower. Blow out from the top of the tower, and the debrominated brine is discharged from the bottom of the blowing tower. The bromine-containing gas blown out from the top of the blowing tower enters the first absorption tower through the secondary froth trap, and the 18%-22% sodium hydroxide and urea mixed liquid (preferably formulated concentration i...

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Abstract

The invention discloses a preparation method for sodium bromide. The method comprises the following steps: acidizing and oxidizing; blowing out air; absorbing for three times; concentrating, separating and drying end products. When the method is adopted, the bittern is at room temperature and needs not be heated, so that the energy can be saved; the blown molecular bromine needs not be washed; the process is simplified; air is sealed and recycled; no environmental pollution is caused; the one-blowing three-absorbing process is adopted, the absorbing is sufficient, the absorbing efficiency is high, the extracting ratio can reach 97% or above and 99% excellent sodium bromide end product is acquired; according to the method, the waste water after potassium extraction can be utilized to extract bromine; the sodium bromide product can be further produced; the resource reutilization can be realized.

Description

Technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method for preparing sodium bromide in bromine-containing brine. Background technique [0002] The main methods for producing sodium bromide include neutralization, reduction, and ion exchange. At present, neutralization and reduction are more commonly used. The reduction method basically uses urea reduction. The principle is to first reduce the bromine content. The bromine in the low raw material is blown out with air, and then reduced and absorbed into sodium bromide. This method is a continuous multi-stage process. In the preparation of bromine, the brine needs to be heated to a certain degree, which wastes energy; bromine needs to be washed, and the process is more cumbersome; the common problem is that the air blowing rate of bromine is greatly affected by air temperature and water temperature, and the absorption is not complete. , Which wastes energy and pollutes...

Claims

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Application Information

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IPC IPC(8): C01D3/10
CPCC01D3/10C01P2006/80
Inventor 杨春彬孙彤江孙桂林刘善书林春辉刘淑洪牟作磊朱林生辛鹏
Owner SHANDONG HAIWANG CHEM
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