Method for industrial hydrochloric acid purification by liquid extraction

A technology of industrial hydrochloric acid and high-purity hydrochloric acid, which is applied in chlorine/hydrogen chloride purification, chemical instruments and methods, halogen/halogen acid, etc., can solve the problems of non-continuous production, high energy consumption, high cost, etc., and achieve stable product quality and purification The effect of low cost and little environmental pollution

Inactive Publication Date: 2007-09-26
广东省富远稀土有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The distillation method is to heat and evaporate industrial hydrochloric acid, and the evaporated hydrogen chloride gas is condensed or absorbed to obtain high-purity hydrochloric acid. The quality is not stable and cannot be continuously produced
The resin method is to pass industrial hydrochloric acid through a polymer functional adsorption resin to remove metal ions and a certain amount of divalent anions in industrial hydrochloric acid. Mg requires high requirements for use, which affects its scope of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 10% N235, 10% ROH, 80% kerosene to extract the organic phase according to the volume ratio, industrial hydrochloric acid concentration: 9.86N, CaO 39.25mg / L, Fe 2 o 3 0.069mg / L, PbO 0.32mg / L, ZnO 0.5mg / L, NiO 0.019mg / L, CuO 0.044mg / L, CaO, Fe in pure water 2 o 3 , PbO, ZnO, NiO, and CuO are all less than 0.01mg / L; the total number of countercurrent mixing and clarification extraction tanks is 18, and the number of stages is configured as extraction section 3, clarification section 2, washing section 4, and stripping section 9 . The extracted organic phase enters from the first stage of the countercurrent mixing and clarifying extraction tank, the industrial hydrochloric acid enters from the second and third stages of the countercurrent mixing and clarifying extraction tank, and the pure water enters from the 18th stage of the countercurrent mixing and clarifying extraction tank, the extracted organic phase: industrial hydrochloric acid: pure The water flow rate...

Embodiment 2

[0019] Take 30% N235, 30% ROH, 40% kerosene to extract the organic phase according to the volume ratio, industrial hydrochloric acid concentration: 9.92N, CaO 45.36mg / L, Fe 2 o 3 0.18mg / L, PbO 0.36mg / L, ZnO 0.44mg / L, NiO 0.021mg / L, CuO 0.038mg / L, CaO, Fe in pure water 2 o 3 , PbO, ZnO, NiO, and CuO are all less than 0.01mg / L; the total number of countercurrent mixing and clarification extraction tanks is 23, and the number of stages is configured as extraction section 5, clarification section 3, washing section 5, and stripping section 10 . The extracted organic phase enters from the first stage of the countercurrent mixing and clarifying extraction tank, industrial hydrochloric acid enters from the third, fourth and fifth fractions of the countercurrent mixing and clarifying extraction tank, and pure water enters from the 20th stage of the countercurrent mixing and clarifying extraction tank to extract the organic phase : Industrial hydrochloric acid: pure water The flow ...

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PUM

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Abstract

The invention discloses a method of extractive purifying industrial alcaine, which comprises the following steps: setting triallylamine as extractant, isooctanol as assisting solvent and coal oil as diluent; forming extract organic phase through kerosene; extracting industrial alcaine in the extract pot; washing through pure water; stripping; getting high-purity alcaine. The invention possesses steady quality and high-purity, which can realize continuous mass production.

Description

technical field [0001] The invention belongs to the field of fine chemical industry and relates to a method for purifying industrial hydrochloric acid. Background technique [0002] At present, the main methods of industrial hydrochloric acid purification are distillation and resin method. The distillation method is to heat and evaporate industrial hydrochloric acid, and the evaporated hydrogen chloride gas is condensed or absorbed to obtain high-purity hydrochloric acid. The quality is unstable and cannot be continuously produced. The resin method is to pass industrial hydrochloric acid through a polymer functional adsorption resin to remove metal ions and a certain amount of divalent anions in industrial hydrochloric acid. Mg requires high requirements for use, which affects its scope of use. Contents of the invention [0003] The purpose of the present invention is to provide a method for extracting and purifying industrial hydrochloric acid with good safety performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07C01B7/075
Inventor 胡建康韩旗英钟德强杨聪平凌诚
Owner 广东省富远稀土有限公司
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