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Preparation method and reaction equipment of iodine pentafluoride

A technology of iodine pentafluoride and reaction equipment, applied in the direction of interhalogen compounds, etc., can solve the problems of low solubility, low reaction rate, low iodine solubility, etc.

Active Publication Date: 2010-12-22
FUJIAN YONGJING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Preparation method and reaction equipment of iodine pentafluoride
  • Preparation method and reaction equipment of iodine pentafluoride

Examples

Experimental program
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Effect test

Embodiment 1

[0040] see figure 1 This embodiment provides a reaction device for preparing iodine pentafluoride. The reaction device includes a closed reactor 1, and the bottom of the reactor 1 is a space for accommodating the reaction solution 14. In this embodiment, the reaction solution 14 is iodine iodine pentafluoride solution, an iodine tray 8 is arranged above the space for accommodating the reaction solution 14, solid iodine 15 is placed on the iodine tray 8, and many small holes with a diameter of 5mm are arranged below the iodine tray 8, so that the bottom forms a similar The structure of the sieve plate, these small holes are iodine pentafluoride outlets flowing out to the space for containing the reaction solution 14, the solid iodine 15 does not directly contact the reaction solution 14, and the lower part of the space for containing the reaction solution 14 is provided with a fluorine gas inlet 11, Reactor 1 is provided with iodine addition port 7 and is used for adding the so...

Embodiment 2

[0046] With reference to the equipment and steps described in Example 1, first purify reactor 1, get 100 kg of iodine pentafluoride liquid and add it to the reactor, then get 100 kg of iodine (purity 99.5%) and add it to the reactor, and blow the reactor repeatedly. Pure nitrogen, to replace the air introduced by iodine addition in the reactor, pass cooling water to pass fluorine gas, at this time, the temperature in the reactor begins to rise, and the pressure increases slowly. When the pressure in the reactor is higher than 0.035MPa, open the reactor to vent The valve discharges impurity gas, reduces the internal pressure of the reactor to normal pressure, and then continues the reaction.

[0047] During the reaction process, the temperature was kept at 65-80°C. When the temperature of the reactor tended to drop significantly, the input of fluorine gas was reduced to check the termination of the reaction. The increase of iodine pentafluoride was 173kg, and the product yield w...

Embodiment 3

[0049] With reference to the equipment and steps described in Example 1, first purify the reactor, get 100 kg of iodine pentafluoride liquid and add it to the reactor, then get 300 kg of iodine (purity 99.5%) and add it to the reactor; Blow high-purity nitrogen to replace the air introduced by iodine addition in the reactor, pass cooling water; pass fluorine gas, at this time, the temperature in the reactor begins to rise, and the pressure increases slowly. When the pressure in the reactor is higher than 0.035MPa, open The reactor vent valve discharges impurity gas, reduces the internal pressure of the reactor to normal pressure, and then continues the reaction.

[0050] During the reaction process, the temperature was maintained at 65-80°C. When the temperature of the reactor tended to drop significantly, the input of fluorine gas was reduced to check the termination of the reaction. The increase of iodine pentafluoride was 520kg, and the product yield was 99.1%.

[0051] As ...

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Abstract

The invention discloses a preparation method of iodine pentafluoride, which has the advantages of continuous reaction, high yield, mild and complete reaction and very light pollution level and comprises the following steps: placing solid iodine above liquid iodine pentafluoride or an iodine pentafluoride solution of iodine, introducing fluorine gas in the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine, and reacting solid iodine and fluorine gas to generate iodine pentafluoride which flows in the liquid iodine pentafluoride or the iodine pentafluoride solution of iodine after dissolving the iodine partially. The invention also discloses reaction equipment dedicated for the method.

Description

technical field [0001] The invention relates to a preparation method of iodine pentafluoride and reaction equipment for preparing 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...

Claims

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Application Information

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IPC IPC(8): C01B7/24
CPCC01B7/24
Inventor 万群平
Owner FUJIAN YONGJING TECH CO LTD
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