Novel azeotrope-type solvent mixture of methanol and 1,4-dihydro

Details Novel azeotrope-type solvent mixture of methanol and 1,4-dihydro Novel azeotrope-type solvent mixture of methanol and 1,4-dihydro

1991-01-23

1991-12-17

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

134 12, 134 31, 134 38, 134 39, 134 40, 203 67, 252162, 252170, 252364, 252DIG9, C11D 730, C11D 750, C23G 5028, B06B 300

Patent

active

050732919

ABSTRACT:
The invention relates to an azeotrope-type mixture which contains about 3-5% by weight of methanol and about 95-97% by weight of 1,4-dihydroperfluorobutane, and also to a process for cleaning electronic components, in particular soldered conductor boards or printed circuits, with the aid of said mixture.

REFERENCES:
patent: 3927129 (1975-12-01), Hazeldine et al.
patent: 3960746 (1976-06-01), Gorski
patent: 4157979 (1979-06-01), Walters
patent: 4810412 (1989-03-01), Merchant et al.
patent: 4816174 (1989-03-01), Lund et al.
patent: 4842764 (1989-06-01), Lund et al.
Chemical Abstract No. 82(19):118757y, Abstract of Burns et al. "Fluorine Compounds in Anesthesia, 8, Examination of Seven Derivatives of Propane and Three of Normal Butane", Anesthesia 29(4 1974, pp. 435-444.

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