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Method and equipment for distilling and purifying iodine pentafluoride

A technology of iodine pentafluoride and rectification, applied in the direction of interhalogen compounds, etc., can solve problems such as inability to separate hydrogen fluoride, blockage of valves and pipelines, high viscosity, etc.

Active Publication Date: 2017-01-04
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary distillation and purification cannot achieve the purpose of separating hydrogen fluoride
Moreover, fluoride liquids tend to have relatively high viscosity. If the liquid accumulates in valves and pipelines for a long time, it will lead to blockage of valves and pipelines.

Method used

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  • Method and equipment for distilling and purifying iodine pentafluoride

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Embodiment 1

[0059] The equipment and method of the present invention are used to separate the crude product with a mass fraction of iodine pentafluoride of 98%. The rectification device has a column diameter of φ20mm, a built-in tray, and the number of trays is 20. The feeding position is the tower kettle. Control the temperature at the bottom of the tower to 130°C, the temperature at the top of the tower to 115°C, and the reflux ratio to 5. Among them, the gas phase product from the gas phase extraction outlet at the top of the tower is cooled to a liquid phase product (colorless), with a content of 99.8%, and a metal ion content of 40ppm (total).

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Abstract

The invention discloses a method and equipment for distilling and purifying iodine pentafluoride. The method comprises steps as follows: (I), performing a leakage test on a tower reactor; (II), performing feeding on the tower reactor; (III), performing vacuum pumping treatment; (IV), heating the tower reactor and receiving front cut fractions; (V), receiving main distillate fractions; (VI), performing after-cut fraction treatment. The equipment comprises a distillation column, the tower reactor, a tower bottom oil bath reboiler and a tower top fractional condenser. According to the method and the equipment for distilling, separating and purifying iodine pentafluoride prepared with an iodine and fluorine fluorination method, an iodine pentafluoride product with the purity of 99.5% or higher can be obtained continuously and stably, and the content of metal ions is 50 ppm or lower.

Description

technical field [0001] The invention belongs to a process method for purifying iodine pentafluoride, in particular to a method and equipment for rectifying and purifying iodine pentafluoride. Background technique [0002] As an important raw material and intermediate of fluorine chemical industry, iodine pentafluoride is receiving more and more attention. It is widely used in organic medicine, plastic rubber, surfactant, superconducting materials and other fields. [0003] At present, the domestic preparation of iodine pentafluoride mainly adopts the fluorination method of iodine and fluorine gas. Because of the strong oxidation activity and corrosiveness of fluorine gas and iodine pentafluoride, the reactors and pipes in contact with them will be corroded by them, and a certain amount of metal ions will be produced, which will dissolve in the product and become one of the impurities. At the same time, there is a part of hydrogen fluoride gas in the fluorine gas, which is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/24
CPCC01B7/24
Inventor 仝庆贺邓崔学文
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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