Method for diluting sulfuric acid for bromine preparation

A technology of sulfuric acid and brine, applied in the directions of sulfur trioxide/sulfuric acid, bromine/hydrogen bromide, etc., can solve the problems of high consumption of fresh water, reduction of Baume degree of brine, adverse effects of brine use, etc., and achieve the effect of saving fresh water consumption.

Inactive Publication Date: 2017-01-04
TIANJIN CHANGLU HAIJING GRP CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Usually, fresh water is used for sulfuric acid dilution. Due to the serious situation of water conservation, the amount of fresh water is strictly controlled; at the same time, the large amount of fresh water used will dilute the brine, reduce the Baume degree of brine, and adversely affect the use of brine in the next step.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First feed fresh water into the pool containing 10 Baume degrees brine to keep the brine at 6 Baume degrees. Pump 98% sulfuric acid into the high level tank, slowly feed sulfuric acid into the mixer through the pipeline, and then pump 6 Baume brine into the mixer. 6 Baume degree brine is mixed with 98% sulfuric acid in a mixer, and the sulfuric acid concentration reaches 5% after mixing. During the mixing process, the flow rate of sulfuric acid with a concentration of 98% is stabilized, and the sulfuric acid is diluted to a concentration of 5% mainly by adjusting the brine flow rate of 6 Baume degrees. Cool the sulfuric acid with a concentration of 5% through a jacketed heat exchanger to reduce the temperature of the sulfuric acid to 45°C. Finally, pass 5% sulfuric acid with a temperature lower than 45°C into bromine brine for acidification.

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PUM

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Abstract

The invention discloses a method for diluting sulfuric acid for bromine preparation. The method comprises the following steps of (i) preparing diluting brine; (ii) mixing the brine with the sulfuric acid; (iii) performing cooling in a mixing device. The method for diluting sulfuric acid for bromine preparation provided by the invention has the advantages that the bromine is used for diluting the sulfuric acid; the consumption of fresh water is effectively reduced; meanwhile, the adverse influence on the use of the brine in the next step through brine baume degree reduction due to great fresh water consumption is avoided.

Description

technical field [0001] The invention belongs to a method for diluting sulfuric acid, in particular to a method for diluting sulfuric acid for bromine production. Background technique [0002] Pure sulfuric acid is generally a colorless oily liquid with a density of 1.84 g / cm³ and a boiling point of 337°C. It can be miscible with water in any proportion and release a lot of heat to make water boil. In the production of bromine from brine, sulfuric acid is used to acidify the brine. In order to avoid the large amount of heat released by sulfuric acid dilution from affecting the production process of bromine, the sulfuric acid is generally diluted first, and then the brine is acidified. Fresh water is usually used for sulfuric acid dilution. Due to the severe situation of water conservation, the amount of fresh water is strictly controlled. At the same time, the use of fresh water will dilute the brine and reduce the Baume degree of brine, which will have an adverse effect on t...

Claims

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Application Information

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IPC IPC(8): C01B17/69C01B7/09
Inventor 杨继林杨金水张连军王法张颖左玉伟
Owner TIANJIN CHANGLU HAIJING GRP CO LTD
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