Compositions – Water-softening or purifying or scale-inhibiting agents
Patent
1989-12-19
1992-04-14
Lieberman, Paul
Compositions
Water-softening or purifying or scale-inhibiting agents
252162, 252172, 252364, 252 79, C23G 5028, C11D 750
Patent
active
051045648
ABSTRACT:
A high-boiling hydrochlorofluorofluorocarbon (HCFC) solvent comprising a blend of for every 100 parts by weight of a hydrochlorofluorocarbon (e.g., 1,1,1-trifluorodichloroethane or 1,1-dichloro-1-fluoroethane) from about 25 to about 400 parts by weight of a selected organic solvent (e.g., dipropylene glycol monomethyl ether, dipropylene glycol monomethyl ether acetate, or mixture of dimethyladipate, dimethylglutarate, and dimethylsuccinate). Such solvents are useful in liquid/vapor phase cleaning applications even at elevated temperatures above the boiling temperature predicted by Raoult's law.
REFERENCES:
patent: 3183192 (1965-05-01), Bauer
patent: 3692635 (1972-09-01), Fozzard
Dishart Kenneth T.
Lermond David S.
Merchant Abid N.
Darland J.
E. I. Du Pont de Nemours and Company
Lieberman Paul
Stevenson Robert B.
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