HFO-1234yf inhibited solutions
AssigneeHoneywell International Inc.
InventorsDavid Nalewajek, Rajiv Ratna Singh, Rajiv Banavali, Gregory Laurence Smith
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Abstract
The present invention provides a composition comprising 2,3,3,3-tetrafluoropropene and α-terpinene particularly useful in automotive air conditioning systems and devices, commercial refrigeration systems and devices, chillers, residential refrigerator and freezers, general air conditioning systems, heat pumps, and the like.
Claims9
A composition that has been stored in a container at one or more temperatures in the range of temperatures of from about −10° C. to about 50° C. over a period of at least 30 days, said composition consisting essentially of HFO-1234yf and α-terpinene, and being in the presence of least one radical initiator contaminant, wherein after said storage period in the presence of said contaminant, said composition has an NVR of HFO-1234yf that is not greater than 0.01 weight % (100 ppm).
A method of inhibiting the formation of HFO-1234yf polymerization products in the presence of least one radical initiator contaminant, said method comprising forming a refrigerant composition consisting essentially of at least one refrigerant and α-terpinene, wherein said at least one refrigerant contains said HFO-1234yf to produce a refrigerant composition having a NonVolatile Residue (NVR) of the HFO-1234yf less than 0.01 weight percent (100 ppm).
A closed storage container containing a refrigerant composition consisting essentially of:
- (a) at least one refrigerant containing HFO-1234yf;
- and (b) α-terpinene and having thereon a threaded valve with a cumene hydroperoxide containing sealant on the threaded valve.
Dependencies are inferred from the claim text.