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Method for preparing iodine pentafluoride

A technology of iodine pentafluoride and fluorine gas, applied in the direction of interhalogen compounds, etc., can solve the problems of environment, excess steam iodine heptafluoride, and difficult control of reaction temperature, etc., and achieve simple process, high yield and stable product quality reliable effect

Active Publication Date: 2008-07-09
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the reaction speed of iodine and fluorine gas is fast, and exothermic heat is big, therefore, the first step reaction temperature in the above-mentioned preparation iodine pentafluoride method is not easy to control, easily produces redundant steam and / or by-product iodine heptafluoride, Leads to lower yields and environmental concerns
In addition, the above two-step method has a serious problem of pipeline blockage

Method used

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  • Method for preparing iodine pentafluoride

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Effect test

Embodiment 1

[0033] First purify reactor 1, get iodine pentafluoride liquid 100kg and add in reactor 1, then get iodine (purity 99.5%) 2kg and add reactor 1; Airtight reactor 1, pressure is pumped to-0.08MPa, logical cooling water; Fluorine, now the temperature in the reactor 1 begins to rise from room temperature, and the pressure increases gradually. Control the opening of the fluorine valve 9 so that the pressure in the reactor 1 is lower than -0.02MPa. When the pressure in the reactor is higher than -0.02MPa ( When close to atmospheric pressure), open the vacuum pump evacuation valve 10 to remove impurity gas, reduce the internal pressure of reactor 1 to -0.08MPa, and then continue the reaction.

[0034] During the reaction process, the temperature was maintained at 60-75°C. When the temperature of the reactor tended to drop significantly, the fluorine gas was turned off to check the termination of the reaction. The increase of iodine pentafluoride was 3.4kg, and the product yield was 9...

Embodiment 2

[0036] First purify reactor 1, get iodine pentafluoride liquid 150kg and add in reactor 1, then get iodine (purity 99.5%) 30kg and add reactor 1; Airtight reactor 1, vacuumize to-0.07MPa, logical cooling water; Fluorine, now the temperature in the reactor 1 begins to rise from room temperature, and the pressure increases gradually. Control the opening of the fluorine valve 9 so that the pressure in the reactor 1 is lower than -0.02MPa. When the pressure in the reactor is higher than -0.02MPa ( Close to atmospheric pressure), open the vacuum pump to remove impurity gas through the evacuation valve 10, reduce the internal pressure of the reactor 1 to -0.06MPa, and then continue the reaction.

[0037] During the reaction process, the temperature was maintained at 60-82°C. When the temperature of the reactor tended to drop significantly, the fluorine gas was turned off to check the termination of the reaction. The increase of iodine pentafluoride was 50kg, and the product yield was...

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Abstract

The invention discloses a method of preparing iodine pentafluoride by chemical reaction in a negative pressure container with iodine and fluorine gas as raw materials, and iodine pentafluoride as the carrier. The method includes the following steps: firstly, the iodine is put in a reactor with iodine pentafluoride liquid; the reactor is sealed and evacuated, with pressure of -0.08 to -0.06MPa; cooling water is fed to cool the product. Then fluorine gas is fed into the reactor to have chemical reaction with the iodine, so as to form the three-phase reaction of gas, liquid and solid; the pressure in the reactor is controlled to be less than -0.02MPa and the temperature is controlled to be lower than 85 DEG C. The invention has the advantages of simple process, low reaction temperature, easiness in being controlled, stable and reliable production quality, and high yield.

Description

technical field [0001] The invention belongs to a method for preparing iodine pentafluoride, and in particular relates to a method for preparing iodine pentafluoride by chemical reaction in a negative pressure vessel by using iodine and fluorine gas as raw materials and iodine pentafluoride as a carrier. Background technique [0002] The preparation of iodine pentafluoride by reacting iodine and fluorine gas is the main way to produce iodine pentafluoride. The current general preparation method is that iodine is burned in fluorine gas, and the reaction is carried out in two steps: [0003] Step 1: Put the iodine on the tray in the airtight container in advance, and then diffuse the fluorine gas. The fluorine gas reacts quickly with the iodine to generate iodine pentafluoride. This process is mainly a gas-solid two-phase reaction, and the reaction temperature range is wide, generally controlled at 80-120 °C; [0004] The second step: the liquid product of the first step reac...

Claims

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Application Information

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IPC IPC(8): C01B7/24
CPCC01B7/24
Inventor 郝树海倪志强李于教
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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