Two tank cleaning process using a contaminated cleaning mixture

Details Two tank cleaning process using a contaminated cleaning mixture Two tank cleaning process using a contaminated cleaning mixture

1975-03-14

1976-05-18

Bashore, S. Leon

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 12, 134 26, 134 30, 134 31, 134 38, 252171, B08B 308, B08B 310

Patent

active

039575314

ABSTRACT:
Contaminated articles, especially printed circuit boards, are cleaned by immersing them in the sump compartment of a cleaning tank containing a boiling mixture of a halogenated hydrocarbon solvent, especially fluorochlorohydrocarbons containing two or three carbon atoms, having a high concentration of an organic solvent, especially isopropyl alcohol, followed by rinsing them in another boiling mixture containing a lower concentration of the organic solvent but at least equal to the organic solvent concentration of the azeotrope.

REFERENCES:
patent: 2153577 (1939-04-01), Levine
patent: 2220124 (1940-11-01), Seaton
patent: 2310569 (1943-02-01), Booth
patent: 2999816 (1961-09-01), Bennet et al.
patent: 3085918 (1963-04-01), Sherliker et al.
patent: 3340199 (1967-09-01), Clay et al.
patent: 3723332 (1973-03-01), Barton
patent: 3881949 (1975-05-01), Brock

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