| abstract |
A lubricant-refrigerant system for centrifugal refrigeration compressors comprising a synthetic lubricant consisting essentially of a diricinoleate of at least one glycol selected from the group consisting of two to five carbon atom glycols, and a fluorocarbon refrigerant. The glycol diricinoleate has a very low solubility for the fluorocarbon refrigerant, has viscosity and pour point characteristics, as well as wear and lubricity properties suitable for adequate lubrication of the bearings, gears, and other components of a centrifugal compressor under all reasonable conditions of use, it is thermally and chemically stable in the presence of the fluorocarbon and the metals usually used in compressors over all reasonably expected service conditions, and enables rapid start-up of the centriifugal compressor. |