Quaternary 1,1,2-trichloro-1,2,2-trifluoro azeotropic cleaning c

Details Quaternary 1,1,2-trichloro-1,2,2-trifluoro azeotropic cleaning c Quaternary 1,1,2-trichloro-1,2,2-trifluoro azeotropic cleaning c

1983-09-12

1984-10-09

Albrecht, Dennis L.

Compositions

Water-softening or purifying or scale-inhibiting agents

134 31, 134 40, 252170, 252172, 252364, 252DIG9, 203 56, 203 66, 203 67, 203 68, C11D 726, C11D 730, C11D 750, C23G 502

Patent

active

044760361

ABSTRACT:
Quaternary azeotropic mixtures of 1,1,2-trichloro-1,2,2-trifluoroethane, methylene chloride, methanol and cyclopentane are provided. These azeotropic mixtures are useful as solvents to remove buffing compounds residues. These mixtures are useful not only because of their high solvency characteristics but also because they exhibit essentially the constant boiling characteristics of an azeotrope which is formed between these components, thereby facilitating handling and purification of the solvent mixtures without significantly altering their compositions. [The quaternary mixtures disclosed herein exhibit certain advantageous solvency characteristics of glycol based compositions, over the known binary or ternary azeotropic systems containing 1,1,2-trichloro-1,2,2-trifluoroethane, methylene chloride, methanol and cyclopentane.]

REFERENCES:
patent: 2999817 (1961-09-01), Bower
patent: 3400077 (1968-09-01), Orfeo et al.
patent: 3607767 (1971-04-01), Schofield

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