Method and equipment for distilling and purifying iodine pentafluoride

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...

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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.

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