Removal of thiothionylfluoride from sulfur tetrafluoride
AssigneeAir Products and Chemicals, Inc.
InventorPhilip Bruce Henderson
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Abstract
A process for removing thiothionylfluoride from a composition containing sulfur tetrafluoride and thiothionylfluoride includes contacting the composition with a high surface area material, such as activated carbon. The process can provide purified sulfur tetrafluoride free of thiothionylfluoride. The high surface area material can be replaced for further processing. Alternatively, the material can be regenerated by contacting it with a gas mixture of oxygen and nitrogen at 150-450° C. and converting the adsorbed elemental sulfur to sulfur dioxide without oxidation of the material.
Claims19
A process for removing thiothionylfluoride from a composition containing sulfur tetrafluoride and an initial concentration of thiothionylfluoride, said process comprising:
- contacting said composition with an activated carbon;
- reacting at least a portion of said thiothionylfluoride to form elemental sulfur;
- and
- recovering a purified composition containing said sulfur tetrafluoride and said thiothionylfluoride at a reduced concentration less than said initial concentration.
A process for removing thiothionylfluoride from a composition containing sulfur tetrafluoride and an initial concentration of thiothionylfluoride, said process comprising:
- contacting said composition with a material having a surface area of at least 400 m2/g, wherein said material is free of metal oxides;
- reacting at least a portion of said thiothionylfluoride to form elemental sulfur;
- and
- recovering a purified composition containing said sulfur tetrafluoride and said thiothionylfluoride at a reduced concentration less than said initial concentration.
Dependencies are inferred from the claim text.