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Hydroiodic acid purifying method

A purification method, a technology of hydroiodic acid, applied in chemical instruments and methods, separation methods, hydrogen iodide, etc., can solve the problems of long time, high cost, cumbersome steps, etc., and achieve reduced content, good purity and yield, Simple operation effect

Inactive Publication Date: 2018-10-16
TAICANG HUSHI REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has a low removal rate of iodine elemental impurities, and in addition, the steps are cumbersome, long in time, large in energy consumption and high in cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The industrial grade hydroiodic acid was passed through an adsorption column filled with zeolite imidazolate framework materials (ZIFs) at a flow rate of 15 mL / min at a temperature of 25 ° C, wherein the amount of zeolite imidazolate framework materials was 10, and the crude product of hydroiodic acid The quality is 1 meter. This example hydroiodic acid is through sampling analysis, and its elemental iodine impurity content is 0.35ppm, and product yield is 97.2%.

Embodiment 2

[0020] Industrial-grade hydroiodic acid is passed through an adsorption column packed with zeolite imidazolate framework materials (ZIFs) at a flow rate of 20 mL / min at a temperature of 40 ° C, wherein the amount of zeolite imidazolate framework materials is 15, and the crude product of hydroiodic acid is The quality is 1 meter. This example hydroiodic acid is through sampling analysis, and its elemental iodine impurity content is 0.39ppm, and product yield is 97.0%.

Embodiment 3

[0022] Industrial-grade hydroiodic acid is passed through an adsorption column packed with zeolite imidazolate framework materials (ZIFs) at a flow rate of 20 mL / min at a temperature of 20 ° C, wherein the amount of zeolite imidazolate framework materials is 12, and the crude product of hydroiodic acid The quality is 1 meter. This example hydroiodic acid is through sampling analysis, and its elemental iodine impurity content is 0.43ppm, and product yield is 96.5%.

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PUM

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Abstract

The invention discloses a hydroiodic acid purifying method. According to the purifying method, to-be-treated crude hydroiodic acid passes through an adsorption column filled with a ZIFs (zeolitic imidazolate frameworks) at the flow rate of 10-20 mL / min. In the purifying method, the ZIFs are used for adsorbing elementary iodine, elementary iodine can be removed better, and content of elementary iodine impurities is reduced. The purifying method is simple to operate, and a purified product has higher purity and high yield.

Description

technical field [0001] The invention relates to the technical field of hydroiodic acid purification, in particular to a method for purifying hydroiodic acid. Background technique [0002] Hydroiodic acid is a water-containing azeotrope containing 55-57% hydrogen iodide. Colorless to pale yellow liquid with pungent odor, which fumes strongly in the air. Boiling point 122.5~126.5℃, relative density d = 1.07 (including HI 0.936~0.99g / mL), melting point -50.8℃ (pure product). In addition, there are hydriodic acid with a concentration of 45% and 67%, and 67% hydriodic acid will be more stable by adding 0.03% hypophosphorous acid. If the bottle is left open for a few days, the hydroiodic acid solution will deteriorate, so it should be kept sealed and filled with nitrogen before sealing. As a reducing agent, it is also used in the synthesis of iodane and other iodides. [0003] Among the impurities of hydriodic acid, the iodine element is relatively high in content. If the iodi...

Claims

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Application Information

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IPC IPC(8): C01B7/13B01D15/20
CPCB01D15/20C01B7/135
Inventor 王永旗王伟吕明冯天佑
Owner TAICANG HUSHI REAGENT
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