A kind of iodine pentafluoride production equipment and production method

Abstract

The invention discloses an iodine pentafluoride production method characterized by continuous reaction, high yield, mild and complete reaction, and extremely light pollution degree. The method includes: in an airtight reactor, placing solid iodine above liquid iodine pentafluoride or an iodine pentafluoride solution of iodine; then introducing fluorine gas into the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine, and simultaneously employing a flowable cooling medium to cool the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine and the gas phase generated above solid iodine in a flow direction from the bottom up, controlling the temperature of the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine at 15-100DEG C, and making the iodine pentafluoride steam and iodine steam in the gas phase generated above the solid iodine condense and flow back to the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine. The invention also discloses production equipment special for the method.

Description

technical field [0001] The invention relates to a production equipment and production method of iodine pentafluoride. Background technique [0002] Iodine pentafluoride is often used as a fluorinating agent, fire starter, and oil and water repellent of textiles. Iodine pentafluoride is a liquid with a density of 3.23g / mL, a melting point of 9.4°C and a boiling point of 104.5°C. [0003] The main way to produce iodine pentafluoride is to prepare iodine pentafluoride by reacting iodine and fluorine gas. At normal temperature and pressure, iodine is a solid with a density of 4.21g / mL and can be dissolved in iodine pentafluoride. Fluorine gas is a gas, and fluorine is a strong oxidizing agent and the most active element. Fluorine gas has a strong pungent odor and is highly toxic. The currently prevailing preparation method is that iodine is burned in fluorine gas and fluorine gas is passed into the iodine pentafluoride liquid in which part of the iodine has been dissolved: ...

AI Technical Summary

Problems solved by technology

[0015] 1. The solubility of iodine in iodine pentafluoride liquid is low, and undissolved iodine is easy to form agglomerates in iodine pentafluoride liquid. After the fluorine gas is introduced, the contact area with iodine is too small, and the reaction rate is very low. A large amount of unreacted fluorine gas will cause environmental pollution and safety problems

[0016] 2. Due to the low solubility of iodine in iodine pentafluoride liquid, the amount of iodine added is small, that is, frequent iodine addition is required, and the production cannot be carried out continuously

It is necessary to stop the input of fluorine gas when extracting the miscellaneous gas from the reactor, and only intermittent production can be used

[0017] 3. The reaction is carried out under negative pressure. As the reaction temperature rises, a large amount of iodine pentafluoride volatilizes into gas, and is discharged from the reactor when the negative pressure is pumped for the second time, and the reaction yield is low.

[0018] 4. The reaction is carried out under the negative pressure of -0.06~-0.08Mpa, which requires high sealing of the reactor. If the sealing is not good, it is easy to inhale air, especially humid air, which will cause the combustion of fluorine gas and pentafluorine in the reactor. Iodine decomposition reaction produces iodic acid and hydrofluoric acid, which affects the quality

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