Claims
- 1. A process for the removal of water from a refrigerant comprising difluoromethane, said process comprising contacting said refrigerant with a desiccant comprising a potassium exchanged zeolite A having greater than about 60 percent of available cations exchanged with potassium and a clay binder, said desiccant having a water adsorption capacity greater than about 15 weight percent, having essentially no difluoromethane adsorption capacity, and having a surface ratio of silicon to aluminum of less than about 1.7 mol/mol as determined by X-ray photoelectron spectroscopy.
CROSS-REFERENCE TO RELATED APPLICATION)N
This application is a continuation-in-part of application Ser. No. 08/879,448 filed Jun. 20, 1997, now U.S. Pat. No. 6,020,281 the contents of which are hereby incorporated by reference.
US Referenced Citations (12)
Non-Patent Literature Citations (2)
Entry |
Donald W. Breck, Zeolite Molecular Sieves, published by Robert E. Krieger Publishing Company, Malabar, Florida—No Date Available. |
Paper “Inorganic Fluoride Uptake as a Measure of Relative Compatibility of Molecular Sieve Desiccants with Fluorocarbon Refrigerants” by Alan P. Cohen and C. Scott Blackwell published in American Heating, Refrigeration, and Air Conditioning Engineers, vol. 101, pp. 1-7, and presented on Jun. 26, 1995 at the Annual ASHRAE Conference in San Diego, CA. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/879448 |
Jun 1997 |
US |
Child |
09/376684 |
|
US |