Refrigerant compositions having a siloxane solubilizing agent
AssigneeHoneywell International Inc.
InventorsSamuel F. Yana Motta, Elizabet Vera Becerra, Mark Spatz, David P. Wilson, Raymond Hilton Thomas
Life of this patent
Estimating the term…
Abstract
Provided are refrigerant compositions which are blends of one or more hydrofluorocarbons, siloxanes, hydrocarbons and lubricants, as well as methods for using these compositions in applications such as the recharging of refrigeration systems and for replacing a chlorofluorocarbon or hydrochlorofluorocarbon in a refrigeration system.
Claims20
A composition comprising:
- (a) a refrigerant selected from the group consisting of a hydrofluorocarbon, hydrofluoroolefin, hydrofluoroether, and blends thereof;
- (b) a solubilizing agent comprising at least one siloxane;
- and
- (c) a refrigeration system lubricant.
A method for recharging a refrigerant system comprising:
- a. removing at least a portion of a chlorine-containing refrigerant from a refrigeration system comprising said chlorine-containing refrigerant and a lubricant, while retaining a majority of said lubricant in said system;
- and
- b. adding a replacement refrigerant composition to said refrigeration system either subsequent to, or simultaneously with, said removing step, wherein said replacement refrigerant composition comprises a refrigerant selected from the group consisting of hydrofluorocarbon, hydrofluoroolefin, hydrofluoroether, and blends thereof;
- and a solubilizing agent comprising at least one siloxane and, optionally, at least one hydrocarbon selected from the group consisting of:
- C1-C6 branched or straight chain alkane, alkene, or alkyl, and a C3-C6 cyclic hydrocarbon.
A method for improving the solubility of a refrigerant in a lubricant comprising:
- contacting a refrigerant selected from the group consisting of a hydrofluorocarbon, hydrofluoroolefin, hydrofluoroether, and blends thereof, with a lubricant selected from the group consisting of mineral oil, hydrocarbon oil, alkyl benzene oil, white or paraffinic oil, polyalkylene glycols, polyalkylene glycol esters, polyol esters, polyalphaolefins, and combinations thereof, wherein said contacting is performed in the presence of a solubilizing agent comprising a siloxane, and optionally, at least one hydrocarbon selected from the group consisting of:
- C1-C6 branched or straight chain alkane, alkene, or alkyl, and a C3-C6 cyclic hydrocarbon.
A refrigerant composition comprising a refrigerant selected from the group consisting of a C1-C6 hydrofluorocarbon, C2-C4 hydrofluoroolefin, C5-C6 hydrofluoroether, and blends thereof and solubilizing agent comprising at least one siloxane selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, and hexaethyldisiloxane, octaethyltrisiloxane.
Dependencies are inferred from the claim text.