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Continuous production of sulfur tetrafluoride

A technology of sulfur tetrafluoride and halogen fluoride, applied in the field of continuous production of sulfur tetrafluoride, to achieve the effect of reducing equipment investment, solving transportation and storage, and increasing safety

Inactive Publication Date: 2005-07-27
马本辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems existing in the existing sulfur tetrafluoride production method, the present invention provides a method for continuous production of sulfur tetrafluoride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Example 1: A 1.8-liter stainless steel reactor, the top cover and the kettle body are connected by flanges and equipped with a vacuum pressure gauge, a digital thermometer probes into the bottom of the kettle, and there are valves to control feeding and discharging. First put 8 grams of sulfur into the reactor, fix the top cover and then vacuumize, 45 grams of liquid IF 5 It is fed into the reactor through the valve using pressure difference and head difference. Close the valve after evacuating again. The reactor was placed in an oil bath and heated to 300°C over two hours and maintained at this temperature for three hours. Reactor is cooled to 10 ℃, and pressure gauge shows that pressure is 0.22MPa, and gas chromatograph inspection (Propak Q packed column, TCD detector, both temperature are 85 ℃, carrier gas is helium, flow rate is 20ml / min, the bridge current is 120mA), the test result is SF 4 Content 91.7%, Air 3%, SF 6 0.20%, the rest is 3.9% of high boiling po...

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Abstract

Continuous production of sulfur tetrafluoride is carried out by synthetic reacting, cooling to separate SF4 from halogen, returning and reutilizing halogen, gas-phase purifying, liquefying and filling. The halogen fluoride has synthetic reaction with pure industrial brim stone proportionally in a reactor, with reacting temperature of 110deg.C-500deg.C, reacting pressure 0.1-1.0MPs, the mole ratio of halogen fluoride to S = 4-5:5 and the excess of the halogen fluoride = 0-25%. It achieves low cost, simple process and higher efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a continuous production method of sulfur tetrafluoride. Background technique [0002] Sulfur tetrafluoride is a very special fluorinating agent, which plays an irreplaceable role in the fluorination of oxygen, sulfur and nitrogen-containing genes (US Patent 2,992,073). According to AIR PRODUCTS ANDCHEMICALS, the world's largest supplier of sulfur tetrafluoride, According to INC., sulfur tetrafluoride has special applications in the deoxyfluorination of aldehydes, ketones, and carboxylic acids. [0003] At present, there are several synthetic methods of sulfur tetrafluoride, the most representative ones are: [0004] 1. U.S. Patent 2,992,073 (1961) mentions the synthesis of sulfur tetrafluoride with alkali metal fluorides, chlorine-containing and sulfur-containing reactants. [0005] 2. U.S. Patent No. 3,950,498 (1976) introduced sulfur tetrachloride (or a mixture of s...

Claims

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Application Information

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IPC IPC(8): C01B17/45
Inventor 马本辉
Owner 马本辉
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