US 12,071,582 B2
Process and methods for reclaiming flammable and non-flammable hydrofluoro-olefin containing refrigerants
Mary E. Koban, Chadds Ford, PA (US); Joshua Hughes, Wilmington, DE (US); Karl Robert Krause, Kennett Square, PA (US); Barbara Haviland Minor, Elkton, MD (US); Sheng Peng, Hockessin, DE (US); Pradeep Sharma, Wilmington, DE (US); Jian Sun-Blanks, Earleville, MD (US); and Hans Westdijk, Oud-Beijerland (NL)
Assigned to THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US)
Appl. No. 17/268,141
Filed by THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US)
PCT Filed Mar. 6, 2020, PCT No. PCT/US2020/021387
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2020/185558, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/952,667, filed on Dec. 23, 2019.
Claims priority of provisional application 62/815,490, filed on Mar. 8, 2019.
Prior Publication US 2021/0301189 A1, Sep. 30, 2021
Int. Cl. C09K 5/04 (2006.01); F25B 45/00 (2006.01)
CPC C09K 5/045 (2013.01) [F25B 45/00 (2013.01); C09K 2205/126 (2013.01); F25B 2345/002 (2013.01)] 35 Claims
OG exemplary drawing
 
1. A method of reclaiming refrigerant, comprising:
transferring an unreclaimed refrigerant composition including one or more hydrofluoro olefins, from a source vessel to a receiving vessel, at least one of the source vessel and the receiving vessel being a vertical cylinder, wherein a bottom of the vertical cylinder has an integrated pallet and/or wherein the vertical cylinder has bottom valves;
transporting the receiving vessel to a treatment center;
performing an analysis selected from the group consisting of gas chromatography, mass spectrometry, atomic absorption spectroscopy, flame emission spectroscopy, infra-red spectroscopy, and combinations thereof on the unreclaimed refrigerant composition to determine a composition of the unreclaimed refrigerant composition sample;
determining a target composition based on the analyzed unreclaimed refrigerant composition;
determining one or more treatments based on the target composition;
performing at least one treatment selected from the group consisting of transferring, blending, distillation, nitrogen purging, filtration, dehydration, caustic scrubbing, decanting, and combinations thereof to form a partially reclaimed refrigerant composition or a reclaimed refrigerant composition,
wherein the reclaimed refrigerant composition is equal to the target composition.