Compositions – Vaporization – or expansion – refrigeration or heat or energy... – With lubricants – or warning – stabilizing or anti-corrosion...
Patent
1996-12-19
1999-03-09
Skane, Christine
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
With lubricants, or warning, stabilizing or anti-corrosion...
252 67, 62 85, C09K 504
Patent
active
058795812
ABSTRACT:
In a composition for use in a refrigeration cycle which comprises at least a hydrofluorocarbon, a refrigerator oil, and a desiccating agent, the desiccating agent possesses a capacity for adsorption of difluoromethane of less than 2.77% by weight as determined by the McBain method. This desiccating agent is a sodium.potassium A type zeolite which has a sodium content of not less than 6% by weight, a potassium content of not less than 5% by weight, and a total sodium and potassium content in the range of from 13 to 20% by weight. Owing to the use of the desiccating agent of this quality, the water concentration in the refrigeration cycle can be lowered without entraining decomposition of such a Flon alternative as difluoromethane which is used in the place of dichlorodifluoroethane or monochloro-difluoromethane.
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patent: 5425242 (1995-06-01), Dunne et al.
Cohen, "Compatibility and Performance of Molecular Sieve Desiccants", Sci. Tech. Froid., pp. 21-28. 1994.
Kabushiki Kaisha Toshiba
Skane Christine
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