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A kind of rectifying method that contains iodohydriodic acid feed liquid

A technology of hydriodic acid and feed liquid, applied in the field of chemical engineering, can solve problems such as rectification of hydriodic acid that is difficult to contain iodine, and achieve the effect of preventing the failure of rectification operation

Active Publication Date: 2015-10-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above phenomena and problems make it difficult for conventional rectification methods and common rectification equipment to be directly applied to the rectification of hydroiodic acid containing iodine

Method used

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  • A kind of rectifying method that contains iodohydriodic acid feed liquid

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, in this embodiment, the inner diameter of the packed tower is 5cm, the inner packing is a glass spring packing of Ф3mm*20mm, the height of the packing layer is 1m, and the feeding port of the feed liquid containing iodohydriodic acid is 0.8m away from the top of the tower. The inlet of the injection pipeline system 8 on the tower for drip irrigation of hydroiodic acid (ie, the aqueous solution of HI) is located at the top of the tower. The iodine-containing hydroiodic acid feed solution to be rectified consists of HI:H 2 O:I 2 =1:7.5:1.5, the concentration of the hydriodic acid solution in the hydriodic acid storage tank 7 is [HI]=6.0mol / L.

[0032] Before the rectification treatment of the above-mentioned iodine-containing hydriodic acid feed liquid, first open the hydriodic acid drip irrigation device, and drip hydriodic acid with a concentration of 6.0mol / L in the tower at a rate of 10ml / min for 5min, so that the hydriodic acid in the tow...

Embodiment 2

[0034] Such as figure 1As shown, in this embodiment, the inner diameter of the packed tower is 10cm, the inner packing is glass spring packing of Ф3mm*30mm, the height of the packing layer is 1.5m, and the feeding port of the feed liquid containing iodohydriodic acid is 1m away from the top of the tower. The inlet of the injection pipeline system 8 on the tower for drip irrigation of hydroiodic acid (ie the aqueous solution of HI) is 0.5m away from the top of the tower. The iodine-containing hydroiodic acid feed solution to be rectified consists of HI:H 2 O:I 2 =1:10:1.5, the concentration of the hydriodic acid solution in the hydriodic acid storage tank 7 is [HI]=3.0mol / L.

[0035] Before the rectification treatment of the above-mentioned iodine-containing hydriodic acid feed liquid, first open the hydriodic acid drip irrigation device, and drip hydriodic acid with a concentration of 3.0mol / L into the tower at a rate of 20ml / min. After 5min, keep 10ml The instillation rate...

Embodiment 3

[0037] Such as figure 1 As shown, in this embodiment, the inner diameter of the packed tower is 15cm, the inner packing is glass spring packing of Ф3mm*30mm, the height of the packing layer is 2m, and the feeding port of the feed liquid containing iodohydriodic acid is 1m away from the top of the tower, toward the packing The inlet of the tower drip irrigation hydroiodic acid (ie the aqueous solution of HI) 8 on the tower is 0.5m away from the top of the tower. The iodine-containing hydroiodic acid feed solution to be rectified consists of HI:H 2 O:I 2 =1:4:1.5, the concentration of the hydriodic acid solution in the hydriodic acid storage tank 7 is [HI]=0.5mol / L.

[0038] Before the rectification treatment of the above-mentioned iodine-containing hydroiodic acid feed liquid, first open the hydroiodic acid drip irrigation device, and drip the hydroiodic acid with a concentration of 0.5mol / L into the tower at a rate of 30ml / min, and after continuing for 5min, keep 10ml The i...

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Abstract

The invention provides an apparatus for rectifying an iodine-containing hydriodic acid liquid. The apparatus comprises a packing tower, a tower bottom reboiler, a tower top condensation reflux device, a feed pipeline system, a tower top discharge pipeline system, a tower bottom discharge pipeline system and a hydriodic acid trickle irrigation device. The method for rectifying an iodine-containing hydriodic acid liquid by using the apparatus comprises the following steps: opening the hydriodic acid trickle irrigation device, and trickling hydriodic acid into the packing tower; under the condition of continuously trickling the hydriodic acid, starting to feed the iodine-containing hydriodic acid liquid into the packing tower, and opening the tower bottom reboiler and the tower top condensation reflux device; and when the tower top condensation reflux device and the tower top discharge pipeline system can perform reflux and discharge, closing the hydriodic acid trickle irrigation device, keeping feeding the iodine-containing hydriodic acid liquid into the packing tower, and continuously discharging from the tower top and the tower bottom. When the rectifying apparatus is used to rectify the iodine-containing hydriodic acid liquid, the rectifying operation failure caused by the situation that I2 in the iodine-containing hydriodic acid liquid is condensed at the tower top of the packing tower can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a kind of iodine-containing hydroiodic acid feed solution (i.e. hydrogen iodide-iodine-water ternary solution, HI-I 2 -H 2 O) the rectification method. Background technique [0002] Iodohydriodic acid feed solution (i.e. hydrogen iodide-iodine-water ternary solution, HI-I 2 -H 2 (2) The rectifying operation can be used in the thermochemical iodine-sulfur cycle decomposition water hydrogen production process and the electrochemical production process of hydroiodic acid. Taking the former as an example, in the hydrogen production process of the iodine-sulfur cycle, the hydroiodic acid generated by the Bunsen reaction forms HI-I due to the addition of excess iodine. 2 -H 2 The O phase needs to be rectified to obtain the HI needed for hydrogen production. [0003] Thanks to HI-I 2 -H 2 Iodine (I 2 ) is extremely volatile, and produces iodine vapor when heated to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/42
Inventor 陈崧哲张平王来军王仁玲徐景明
Owner TSINGHUA UNIV
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