Method of preparing sulfuryl fluoride
AssigneesContemporary Amperex Technology Co., Limited, Catl-Sicong Novel Materials Co., Ltd
InventorsSicong Cheng, Qisen Huang
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Abstract
The present application provides a method of preparing sulfuryl fluoride, including the following steps of: S1) reacting sulfur trioxide steam with barium fluoride to acquire a mixed gas of barium sulphate and sulfuryl fluoride; S2) pickling the mixed gas acquired in step S1 with a concentrated sulfuric acid solution with a concentration of 70-98.3 wt. % to acquire a primary purified sulfuryl fluoride gas; S3) passing the primary purified sulfuryl fluoride gas acquired in step S2 through an aqueous solution with a concentration of 2-10 wt. % selected from at least one of the following: sodium sulfite, sodium bisulfite, sodium pyrosulfite, and sodium thiosulfate, to acquire a sulfuryl fluoride gas.
Claims20
A method of preparing sulfuryl fluoride, comprising the following steps of:
- S1) reacting sulfur trioxide steam with barium fluoride to acquire a mixed gas of barium sulphate and sulfuryl fluoride;
- S2) pickling the mixed gas acquired in step S1 with a concentrated sulfuric acid solution with a concentration of 70-98.3 wt. % to acquire a primary purified sulfuryl fluoride gas;
- and
- S3) passing the primary purified sulfuryl fluoride gas acquired in step S2 through an aqueous solution with a concentration of 2-10 wt. % of a compound selected from at least one of the following:
- sodium sulfite, sodium bisulfite, sodium pyrosulfite, or sodium thiosulfate, to acquire a sulfuryl fluoride gas,
- wherein in the sulfuryl fluoride gas acquired in step S3, a volume fraction of oxygen difluoride is less than 0.1%.
A method of preparing sulfuryl fluoride, comprising the following steps of:
- S1) reacting sulfur trioxide steam with barium fluoride to acquire a mixed gas of barium sulphate and sulfuryl fluoride;
- S2) pickling the mixed gas acquired in step S1 with a concentrated sulfuric acid solution with a concentration of 70-98.3 wt. % to acquire a primary purified sulfuryl fluoride gas;
- and
- S3) passing the primary purified sulfuryl fluoride gas acquired in step S2 through an aqueous solution with a concentration of 2-10 wt. % of a compound selected from at least one of the following:
- sodium sulfite, sodium bisulfite, sodium pyrosulfite, or sodium thiosulfate, to acquire a sulfuryl fluoride gas,
- wherein in the sulfuryl fluoride gas acquired in step S3, a volume fraction of sulfoxide tetrafluoride is less than 0.15%.
Dependencies are inferred from the claim text.