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Method for continuously preparing iodine pentafluoride

A technology of iodine pentafluoride and fluorine gas, applied in the direction of interhalogen compounds, etc., can solve the problems of inability to carry out continuous operation, limited production efficiency, etc., and achieve the effects of reducing investment costs, controllable reaction temperature, and facilitating industrialization.

Active Publication Date: 2013-09-04
HUBEI ZHUOXI FLUOROCHEM
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Problems solved by technology

However, the first two invention patents are reactor type, which cannot be operated continuously, and the production efficiency is limited

Method used

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  • Method for continuously preparing iodine pentafluoride

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Embodiment Construction

[0027] according to figure 1 As shown, the method for the continuous preparation of iodine pentafluoride of the present invention adopts a series process flow of multi-stage tower reactors. According to the process requirements, the number of towers can be 1 to N levels, and N≥3; f SO 2 F(R f Represents a perfluoroalkyl chain, with carbon atoms ranging from 1 to 12), iodine solution (iodine pentafluoride as a solvent) and fluorine gas or fluorine-nitrogen mixed gas enter the multi-stage reaction tower from both ends to react in reverse flow . The heat absorbed when dissolving iodine and the heat generated in the reaction are taken out through the condenser between the towers, and the reaction tower and the condenser are connected by U-shaped pipes. The purpose of liquid sealing is achieved through the U-shaped tube, because it is filled with iodine solution during the reaction, and the U-shaped tube can prevent fluorine gas from entering the iodine solution pipeline to achi...

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Abstract

The invention discloses a method for continuously preparing iodine pentafluoride. According to the method, a serial process flow of a multistage tower type reactor is adopted; according to process requirement, the tower number can be 1-N grades, wherein N is more than or equal to 3; in the atmosphere containing sulfuryl fluoride (RfSO2F), an iodine pentafluoride solution of iodine and fluoride gas or mixed gas of fluoride and nitrogen respectively enter a multistage reaction tower from two ends, reversely flow and generate a reaction. The method has the advantages that the reaction temperature is controllable, higher safety is ensured and the phenomenon that the iodine is excessively fluoridized at high temperature to generate IF7 is avoided; two iodine dissolving tanks are alternatively used so as to facilitate the continuous atomization; the sulfuryl fluoride atmosphere facilitates the operation of a gas-liquid reaction and is remarkably superior to the hydrogen fluoride existing atmosphere introduced in other patents, so that the purification of products is facilitated; and unreacted fluoride gas in tail gas can be adsorbed by solid salts or alkali and then be recycled. The process equipment and parts are made of general steel; and pitting-free chemical nickel-plating treatment and fluorine gas passivation treatment are used in sequence so as to effectively reduce the investment cost and facilitate the industrialization.

Description

technical field [0001] The invention belongs to a method for continuously preparing iodine pentafluoride, in particular to a method for continuously preparing iodine pentafluoride in a multi-stage reaction tower with iodine and fluorine gas as raw materials and iodine pentafluoride as a carrier in a sulfuryl fluoride environment. gas-liquid countercurrent reaction. Background technique [0002] Preparation of iodine pentafluoride by reaction of iodine and fluorine gas is the main way to produce iodine pentafluoride. At present, the commonly used preparation method is burning iodine in fluorine gas. The reaction temperature of this method is not easy to control, and it is easy to produce redundant steam and by-products. Iodine fluoride, resulting in reduced yield and environmental problems, and the sublimation of iodine at high temperatures can easily cause serious pipeline blockage. [0003] Other preparation methods: According to patent search, there are two domestic inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/24
Inventor 黄澄华李训生谢学归谢子卓
Owner HUBEI ZHUOXI FLUOROCHEM
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