Halogenated alkene heat transfer composition with improved oil return
AssigneeArkema Inc.
InventorsBrett L. Van Horn, Philippe Bonnet, Benjamin Bin Chen, Maher Y. Elsheikh, Richard M. Crooker
Life of this patent
Estimating the term…
Abstract
The invention relates to heat transfer agents and heat transfer compositions containing hydrocarbon lubricating oils and halogentaed alkene heat transfer fluid that promote oil flow and provide for improved oil return. The heat transfer compositions are useful in various heat transfer systems such as refrigeration, cooling, air conditioning, chiller operations.
Claims16
A refrigerant composition comprising (1) the halogenated alkene heat transfer fluid 1-chloro-3,3,3-trifluoropropene, and (2) a mineral oil lubricating oil wherein said halogenated alkene is miscible with said mineral oil lubricating oil in an amount of about 99 wt % or greater.
A method of improving oil return a refrigeration system of the type containing a high global warming potential refrigerant and a lubricant comprising mineral oil comprising the steps of:
- (a) removing said high global warming potential refrigerant from said refrigeration system while leaving a substantial portion of said lubricant in said system;
- and (b) introducing to said lubricant left in said system at least one halogenated alkene trifluoropropene wherein said halogenated alkene is miscible with said mineral oil in an amount of about 99 wt % or greater.
Dependencies are inferred from the claim text.