Stabilized heat activated heat exchange absorption pair
AssigneeAllied Chemical Corporation
InventorsMorris B. Berenbaum, Francis E. Evans, Richard E. Eibeck, Martin A. Robinson
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Abstract
A stabilized heat exchange medium is disclosed including a fluorocarbon, an absorbant and a tribasic phosphite stabilizer. The preferred absorbants are assymetrical furan derivatives containing at least 1 oxygen with a single bond to an adjacent carbon, and is most preferably an alkyl tetrahydrofurfuryl ether. The fluorocarbon contains 1 or 2 carbons, 1 or 2 hydrogens and the remainder chlorine and fluorine. The tribasic phosphites are of the formula (R.sub.1 'O)(R.sub.2 'O)(R.sub.3 'O)P, wherein R.sub.1 ', R.sub.2 ' and R.sub.3 ' are each independently alkyl, alkenyl, phenyl, alkylene phenyl, alkylene alkylphenyl or alkylphenyl.
Claims24
A stabilized absorption composition comprising
- a. a fluorocarbon as refrigerant selected from the group consisting of monochlorodifluoromethane, dichloromonofluoromethane, trifluoromethane, monochloromonofluoromethane, dichlorotrifluoroethane, monochlorotetrafluoroethane, monochlorotrifluoroethane and mixtures thereof;
- b. an asymetrical furan derivative as absorbent of the formula:
- ##STR6## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently H, alkyl having 1-5 carbons, alkoxy having 1-5 carbons, phenyl, alkylene phenyl having 7-11 carbons, hydroxy alkyl having 1-5 carbons, alkoxy alkyl having 2-6 carbons, alkyl carboxylate having 2-6 carbons, fluorine or chlorine, provided that at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 has an oxygen atom which has a single bond to a carbon atom;
- or of the formula ##STR7## where R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13 and R.sub.14 are each independently as defined above for R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6, provided at least one of R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13 and R.sub.14 has an oxygen atom which has a single bond to a carbon atom;
- and
- an effective amount of a stabilizer of the formula (R.sub.1 'O) (R.sub.2 'O) (R.sub.3 'O) P wherein R.sub.1 ', R.sub.2 ' and R.sub.3 ' are each independently alkyl, alkenyl, phenyl, alkylene phenyl, alkylene alkylphenyl, or alkylphenyl.
Dependencies are inferred from the claim text.