Process to clean a lubricated vapor compression refrigeration sy

Details Process to clean a lubricated vapor compression refrigeration sy Process to clean a lubricated vapor compression refrigeration sy

1993-12-30

1994-12-27

Sollecito, John M.

Refrigeration

Processes

Separating or preventing formation of undesirables

62292, 62303, F25B 4700

Patent

active

053754263

ABSTRACT:
A process for removing lubricant, hydrocarbons and mixtures thereof from a vapor compression mechanical refrigeration system by using carbon dioxide as a solvent is disclosed. The process is carried out using supercritical, liquified or gaseous carbon dioxide and removes lubricant to a level below about 5% so as to be compatible with environmentally acceptable refrigerants.

REFERENCES:
patent: 4934390 (1990-06-01), Sapp
patent: 5036675 (1991-08-01), Anderson, Jr.
Publication "Retrofit Guidelines for SUVA.RTM. 134a (SUVA Cold MP) in Stationary Equipment", Illinois Supply Company, Wilmington, Del. 19898.
Publication entitled "Refrigerant Changeover Guidelines CFC-12 to HFC-134a", Copeland Corporation, Sidney, Ohio 45365.

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