Method and equipment for rectifying and purifying iodine pentafluoride
A technology of iodine pentafluoride and rectification, which is applied in the direction of interhalogen compounds, etc., can solve the problems of inability to separate hydrogen fluoride, high viscosity, blockage of valves and pipelines, etc.
Active Publication Date: 2018-06-12
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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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 tower diameter of φ20mm, a built-in tray with 20 trays, and 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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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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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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