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US 12,359,107 B2Granted
Stabilized fluoroolefin refrigerant compositions and methods for their production, storage and usage
AssigneeThe Chemours Company Fc, LLC
InventorsSheng Peng, Luke David Simoni
Life of this patent
Estimating the term…
Abstract
The present invention relates to refrigerant compositions comprising at least one fluoroolefin, at least one lubricant and an effective amount of at least one inhibitor wherein the inhibitor is present in the fluoroolefin and the lubricant.
Claims21
A refrigerant composition comprising HFO-1234ze, HFO-1225ye, trifluoropropyne and greater than 99 wt. % HFO-1234yf hydrofluoroolefin, and
- a. at least one lubricant,
- b. at least one member selected from the group consisting of air, oxygen, cumene hydroperoxide, and fluoroolefin polyperoxides, peroxides, hydroperoxides, persulfates, percarbonates, perborates and hydropersulfates, and
- c. a liquid inhibitor in an amount of between about 50 and less than 1000 ppm which remains liquid in at least one of an evaporator or a compressor sump under operating conditions and comprises at least limonene to render the composition with less than about 0.03 wt. % of homopolymeric products derived from the HFO-1234yf hydrofluoroolefin.
A refrigerant composition consisting essentially of hydrofluoroolefins comprising at least HFO-1234ze, HFO-1225ye, trifluoropropyne, greater than 99 wt. % HFO-1234yf, and optionally HFO-1243zf, and
- a. at least one initiator compound in an amount up to 15,000 ppm,
- b. an inhibitor which remains liquid in at least one of an evaporator or a compressor sump under temperatures from about 75° C. to about 150° C., in an amount up to 500 ppm which reduces, if not eliminates, conversion of at least HFO-1234yf into polymeric products and is selected from at least one of limonene and a-terpinene, and
- c. optionally, at least one of a lubricant, an antioxidant, an acid scavenger, a performance enhancer, a phosphate lubricant stabilizer, and a flame suppressant.
Dependencies are inferred from the claim text.