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Method for purifying simple substance bromine from hydrobromic acid mother liquor

A technology of parent hydrobromide and elemental bromine, which is applied in the field of purifying elemental bromine, and can solve the problems of insufficient or excessive chlorine gas, affecting the quality of bromine, etc.

Inactive Publication Date: 2010-09-15
SHANDONG DADI SALT CHEM GROUP
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Problems solved by technology

[0002] After the hydrobromic acid mother liquor is directly oxidized by introducing chlorine gas into the distillation tower, elemental bromine is decomposed under the action of saturated steam, and after cooling into liquid bromine and bromine water, bromine water is separated to produce finished bromine, but a part of it is free Chlorine is also entrained, which directly affects the quality of bromine
The treatment of free chlorine is often controlled by watching the color of the waste liquid and detecting the content of bromide ions in the waste liquid during the distillation process. There are two defects: 1. The amount of chlorine gas is insufficient, and the content of bromide ions in the distillation waste liquid is too high, which affects 2, excessive chlorine gas, a part of elemental chlorine is evaporated, affecting the quality of bromine

Method used

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  • Method for purifying simple substance bromine from hydrobromic acid mother liquor
  • Method for purifying simple substance bromine from hydrobromic acid mother liquor

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Embodiment Construction

[0021] Embodiment, as shown in the figure, a kind of method for purifying elemental bromine from hydrobromic acid mother liquor comprises the following steps, hydrobromic acid mother liquor enters distillation tower 7 through mother liquor outlet pipe 2 from high-level mother liquor tank 1, and distillation tower 7 is connected There are chlorine gas inlet pipe 8 and steam inlet pipe 9. After the recent chlorine gas from chlorine gas inlet pipe 8 directly oxidizes with hydrobromic acid mother liquor in distillation tower 7, under the action of saturated steam, elemental bromine is resolved, and distillation tower 7 Connect cooler 10, cooler 10 is provided with cooling water inlet pipe 11 and cooling water outlet pipe 12, elemental bromine forms liquid bromine and bromine water through cooling, cooler 10 is connected with primary separation bottle 3, and described primary separation bottle 3 is connected with a secondary separation bottle 4, and the secondary separation bottle 4...

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Abstract

The invention discloses a method for purifying simple substance bromine from hydrobromic acid mother liquor. The method comprises the following step of: treating the hydrobromic acid mother liquor sequentially through the working procedures of primary oxidization, cooling, first-stage separation, secondary oxidization, second-stage separation, and the like. In the invention, the hydrobromic acid mother liquor is led into a first-stage bromine water separation flask, free chlorine directly oxidizes the mother liquor, and reacted bromine is separated through a second-stage separation flask to prepare a finished fine bromine product. Through the secondary separation, the chlorine content in the bromine is reduced to be below 0.01 percent from 0.05 percent, thereby greatly improving the purity of the finished bromine product.

Description

technical field [0001] The invention relates to a method for purifying elemental bromine from hydrobromic acid mother liquor, belonging to the technical field of chemical industry. Background technique [0002] After the hydrobromic acid mother liquor is directly oxidized by introducing chlorine gas into the distillation tower, elemental bromine is decomposed under the action of saturated steam, and after cooling into liquid bromine and bromine water, bromine water is separated to produce finished bromine, but a part of it is free Chlorine is also entrained, directly affecting the quality of bromine. The treatment of free chlorine is often controlled by watching the color of the waste liquid and detecting the content of bromide ions in the waste liquid during the distillation process. There are two defects: 1. The amount of chlorine gas is insufficient, and the content of bromide ions in the distillation waste liquid is too high, which affects 2, chlorine gas is excessive, ...

Claims

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Application Information

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IPC IPC(8): C01B7/09
Inventor 孙文勇王纯洁宋永良李迎堂肖光
Owner SHANDONG DADI SALT CHEM GROUP
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