Processes for producing high-purity trifluoroiodomethane
AssigneeSolstice Advanced Materials US, Inc.
InventorsChristian Jungong, Daniel C. Merkel, Haiyou Wang, Terris Yang, Pascal Bolomey
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Abstract
The present disclosure provides a method for purifying trifluoroiodomethane. The method includes providing a process stream comprising trifluoroiodomethane, organic impurities, and acid impurities; reacting the process stream with a basic aqueous solution, the basic aqueous solution comprising water and at least one base selected from the group of an alkali metal carbonate and an alkali metal hydroxide; and separating at least some of the organic impurities from the process stream.
Claims26
A method for purifying trifluoroiodomethane, the method comprising:
- providing a process stream comprising trifluoroiodomethane, organic impurities, and acid impurities;
- reacting the process stream with a basic aqueous solution, the basic aqueous solution comprising water and an alkali metal carbonate, wherein a concentration of the alkali metal carbonate in the basic aqueous solution is from about 0.5 wt. % to about 5 wt. %;
- and
- separating at least some of the organic impurities from the process stream.
A method for purifying trifluoroiodomethane, the method comprising:
- providing a process stream comprising trifluoroiodomethane, organic impurities, and acid impurities;
- contacting the process stream in the liquid phase with an acid reactive active agent comprising an adsorbent;
- and
- separating at least some of the organic impurities from the process stream.
A method for purifying trifluoroiodomethane, the method comprising:
- providing a process stream comprising trifluoroiodomethane, organic impurities comprising methyl iodide, and acid impurities;
- reacting the process stream with a basic aqueous solution, the basic aqueous solution comprising water and an alkali metal hydroxide, wherein a concentration of the alkali metal hydroxide in the basic aqueous solution is from about 0.01 wt. % to about 0.5 wt. % 5 wt.%;
- wherein a temperature of the process stream is from about 5° C. to about 80° and a pressure of the process stream is from about 1 psig to about 100 psig;
- and a concentration of the methyl iodide in the process stream, in GC area % of total organic compounds, is reduced by at least about 5%;
- and
- separating at least some of the organic impurities from the process stream.
Dependencies are inferred from the claim text.