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Material recycling technique used during sulfur tetrafluoride production

A technology of sulfur tetrafluoride and raw materials, which is applied in the direction of sulfur and halogen compounds, can solve the problems of increased purification treatment costs, loss of raw materials, high production costs, etc., and achieve the effect of reducing purification treatment volume, production costs and product losses

Active Publication Date: 2012-11-21
山东锐华氟业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] General cooling is used to separate sulfur tetrafluoride and halogen, but the recovery rate of halogen is low and the waste is large, mainly because there is no tail gas recovery, so gas phase purification and mixed gas take away a large amount of raw material iodine and iodine pentafluoride and a small amount of tetrafluoride Sulfur fluoride products, which will cause a large loss of raw materials and increase the cost of purification treatment
[0005] Due to the above defects and problems, large-scale continuous production of sulfur tetrafluoride requires large investment and high production costs, so that it is impossible to truly realize the industrialized production of sulfur tetrafluoride

Method used

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  • Material recycling technique used during sulfur tetrafluoride production
  • Material recycling technique used during sulfur tetrafluoride production

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Effect test

Embodiment 1

[0024] The first step to recycle:

[0025] It is synthesized by reacting iodine pentafluoride and sulfur in a sulfur tetrafluoride reactor to obtain crude sulfur tetrafluoride gas.

[0026] The separation and capture of sulfur tetrafluoride is that the iodine pentafluoride and iodine in the sulfur tetrafluoride crude gas are cooled by the condenser, condensed and retained by the condensing separator, and the liquid iodine pentafluoride is recycled for the reaction of sulfur tetrafluoride , the solid iodine is fed into the fluorine gas to react to produce iodine pentafluoride liquid, which flows back to be recycled for the sulfur tetrafluoride reaction; the sulfur tetrafluoride gas in the crude sulfur tetrafluoride gas is condensed and liquefied by the condensation trap, and the resulting purity is 95% of primary sulfur tetrafluoride products are directly loaded into steel cylinders by means of liquid input, and the pressure is controlled by a remote pressure sensor to 0.05Mpa;...

Embodiment 2

[0028] The first step to recycle:

[0029] It is synthesized by reacting iodine pentafluoride and sulfur in a sulfur tetrafluoride reactor to obtain crude sulfur tetrafluoride gas.

[0030] The separation and capture of sulfur tetrafluoride is that the iodine pentafluoride and iodine in the sulfur tetrafluoride crude gas are cooled by the iodine pentafluoride reactor, condensed and retained by the condensation separator, and the liquid iodine pentafluoride is used for tetrafluoride The sulfur reaction is recycled, and the solid iodine is fed into the fluorine gas to react to produce iodine pentafluoride liquid, which flows back to the sulfur tetrafluoride reaction and recycled; the sulfur tetrafluoride gas in the crude sulfur tetrafluoride gas is condensed and liquefied through the condensation trap , to produce primary sulfur tetrafluoride products with a purity of 99%, which are directly loaded into steel cylinders by means of liquid input, and the pressure is controlled by ...

Embodiment 3

[0032] The first step to recycle:

[0033] It is synthesized by reacting iodine pentafluoride and sulfur in a sulfur tetrafluoride reactor to obtain crude sulfur tetrafluoride gas.

[0034] The separation and capture of sulfur tetrafluoride is that the iodine pentafluoride and iodine in the sulfur tetrafluoride crude gas are cooled by the iodine pentafluoride reactor, condensed and retained by the condensation separator, and the liquid iodine pentafluoride is used for tetrafluoride The sulfur reaction is recycled, and the solid iodine is fed into the fluorine gas to react to produce iodine pentafluoride liquid, which flows back to the sulfur tetrafluoride reaction and recycled; the sulfur tetrafluoride gas in the crude sulfur tetrafluoride gas is condensed and liquefied through the condensation trap , to produce primary sulfur tetrafluoride products with a purity of 97%, which are directly loaded into steel cylinders by means of liquid input, and the pressure is controlled by ...

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PUM

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Abstract

The invention relates to a material recycling technique used during sulfur tetrafluoride production. Firstly, the coarse sulfur tetrafluoride gas is produced through reactive synthesis of iodine pentafluoride and sulfur in a sulfur tetrafluoride reactor and then raw materials are initially recycled through condensation, separation and trapping. The impure gases obtained by gas pahse purification during condensation, separation and trapping of sulfur tetrafluoride are evacuated and recovered again through a secondary condensation recovery device. The condensation recovery devices in the initial and secondary stages are utilized to recycle iodine and iodine pentafluoride, which can increase the utilization rate of iodine by more than 70%. The technique can not only reduce material losses and lower production cost but also cut down the volumes to be purified.

Description

technical field [0001] The invention relates to a process for recovering raw materials in the production of fluorine chemical products, more specifically, the invention relates to a process for recovering raw materials in the production of sulfur tetrafluoride, which belongs to the field of fluorine chemical industry. Background technique [0002] Abroad, the United States uses alkali metal fluoride and sulfur to react to synthesize sulfur tetrafluoride; the United States also uses fluorine gas and sulfur to directly react to generate sulfur tetrafluoride (SF 4 ): containing sulfur hexafluoride (SF 6 ), sulfur difluoride (SF 2 ), and containing highly toxic decafluorooxydisulfide (S 2 0F 10 ) and other impurities; the utilization rate of fluorine is low, and the impurity content is much difficult to rinse and purify, the recovery rate is low, and the waste is large; there is no large-scale industrial production of sulfur tetrafluoride abroad. [0003] At present, there a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/45
Inventor 李学庆
Owner 山东锐华氟业有限公司
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