C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/52 (2006.01) C23G 1/36 (2006.01)
Patent
CA 2140906
The aqueous effluent from the wash and/or rinse cycles of a process for cleaning electronic circuit assemblies of rosin flux and other organic residues with an aqueous amine cleaning solution comprises treating the effluent with an alkaline earth metal oxide which reacts with the rosin flux to cause precipitation of an alkaline earth metal rosinate and the retention of free amine in aqueous solution.
On décrit le traitement de l'effluent aqueux provenant des cycles de lavage et/ou de rinçage d'un processus de nettoyage, avec une solution nettoyante aqueuse d'amine, d'agencements de plaquettes à circuits imprimés portant des restes de flux de colophane ou d'autres résidus organiques. On traite l'effluent avec un oxyde d'un métal alcalino-terreux qui réagit avec le flux de colophane, de façon à entraîner sa précipitation sous la forme d'un sel de métal alcalino-terreux, alors que l'amine libre passe en solution aqueuse.
Church & Dwight Company Inc.
Smart & Biggar
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