Gas-phase iodine crystallization method

A crystallization, gas phase technology, applied in the direction of iodine, iodine/hydrogen iodide, etc.

Inactive Publication Date: 2013-04-03
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] After searching, there is currently no patent application for the invention of the gas phase iodine crystallizer

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Embodiment 1

[0021] A method for gas-phase iodine crystallization. The crystallizer used in this method is composed of two sections, which are made into two cubes. The first section is 500mm×500mm×3800mm, and the second section is 250mm×250mm×3800mm. Thin film is used as heat exchange medium. Iodine vapor inlet 1 is arranged on the first section crystallizer 3, is the main crystallization area of ​​iodine, and noncondensable gas outlet 7 is arranged on the second section crystallizer 4, is the secondary crystallization area of ​​iodine; Two sections of crystallizers are fixed on one On the common cone bottom 6, the cone bottom 6 connects the two sections of crystallizers, the cone bottom 6 is a collector of iodine, and a container is arranged under the cone bottom 6; for strengthening stability, the two sections of crystallizers are connected by connecting brackets 6, The outside is connected with the shell bracket 2; the iodine vapor enters the first crystallizer 3 from the iodine vapor i...

Embodiment 2

[0025] A method for gas-phase iodine crystallization. The crystallizer used in this method is composed of two sections, which are made into two cubes. The first section is 500mm×500mm×3800mm, and the second section is 250mm×250mm×3800mm. Thin film is used as heat exchange medium. Iodine vapor inlet 1 is arranged on the first section crystallizer 3, is the main crystallization area of ​​iodine, and noncondensable gas outlet 7 is arranged on the second section crystallizer 4, is the secondary crystallization area of ​​iodine; Two sections of crystallizers are fixed on one On the common cone bottom 6, the cone bottom 6 connects the two sections of crystallizers, the cone bottom 6 is a collector of iodine, and a container is arranged under the cone bottom 6; for strengthening stability, the two sections of crystallizers are connected by connecting brackets 6, The outside is connected with the shell bracket 2; the iodine vapor enters the first crystallizer 3 from the iodine vapor i...

Embodiment 3

[0029] A method for gas-phase iodine crystallization. The crystallizer used in this method is composed of two sections, which are made into two triangles. The first section is an equilateral triangle with a base of 300 mm and a height of 3000 mm. The second section is a base with a base of 200 mm. The sides are triangular, the height is 3000mm, and the heat exchange medium is made of PTFE film. Iodine vapor inlet 1 is arranged on the first section crystallizer 3, is the main crystallization area of ​​iodine, and noncondensable gas outlet 7 is arranged on the second section crystallizer 4, is the secondary crystallization area of ​​iodine; Two sections of crystallizers are fixed on one On the common cone bottom 6, the cone bottom 6 connects the two sections of crystallizers, the cone bottom 6 is a collector of iodine, and a container is arranged under the cone bottom 6; for strengthening stability, the two sections of crystallizers are connected by connecting brackets 6, Th...

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Abstract

The invention discloses a gas-phase iodine crystallization method. A crystallizer adopted by the method is composed of two sections; an iodine vapor inlet is formed in the first section of crystallizer and is a primary iodine crystallization zone; a non-condensable gas outlet is formed in the second section of crystallizer and is a secondary iodine crystallization zone; the iodine vapor enters the first section of crystallizer from the iodine vapor inlet; the outer side is blown by a fan, so that the iodine vapor inside the crystallizer is condensed to become iodine crystal; a little of iodine vapor which is not condensed enters the second section of crystallizer from a cone base, and then is condensed again; and the non-condensable gas is discharged into the behind washer or atmosphere from the non-condensable gas outlet. By adopting the method disclosed by the invention, large-scale industrial production of iodine sublimation or desublimation can be achieved; a single set of device can condense 30Kg of iodine per hour; the highest condensation number can be up to 50Kg; a film is adopted as a cooling heat-exchange medium of iodine; the problems of heat exchange of iodine vapor and an iodine crystal blocking system are solved, and solid foundation is provided for refined purification of iodine by adopting a sublimation method to achieve industrial production.

Description

technical field [0001] The present invention relates to crystallization, in particular, to a crystallization method for iodine refining process. Background technique [0002] As we all know, an important form of iodine is associated with phosphate rock, but its content varies according to the quality of the ore. The technology of producing phosphoric acid from phosphoric acid and then extracting iodine from phosphoric acid has been recorded in Chinese Patent No. 200510003058.2 "Method for extracting iodine from dilute phosphoric acid produced in the production process of iodine-containing phosphorous rock". However, in the process of producing iodine from phosphoric acid, iodine exists in wet-process phosphoric acid in the form of ions. To produce a qualified iodine, the ionic form iodine in dilute phosphoric acid must be oxidized into iodine molecules, and after Extraction, absorption, oxidation analysis of iodine, filtration, sublimation, desublimation, etc. can obtain th...

Claims

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Application Information

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IPC IPC(8): C01B7/14B01D7/02
Inventor 雷学联
Owner WENGFU (GRP) CO LTD
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