B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 61/00 (2006.01) B01D 61/02 (2006.01) B01D 61/14 (2006.01) B01D 61/58 (2006.01) G03F 7/30 (2006.01)
Patent
CA 2242162
The invention concerns a method, including at least one superfine-filtration stage (7, 10), of filtering the organic solutions which arise in the production of circuit boards. In the method proposed, the chemicals dissolved in the solutions used for the production are separated from the organic solvent, e.g. ethyl diglycol, by ultrafiltration (7) for instance, in order to be able to use the chemicals again. The method proposed has the advantage that savings can be made in materials and energy and, in addition, waste can be reduced significantly or even avoided entirely.
L'invention concerne un procédé qui permet de filtrer les solutions organiques provenant de la fabrication des plaquettes de circuits imprimés, et qui comprend au moins une étape de filtration fine (7, 10). Selon le procédé de l'invention, on sépare du solvant organique, l'éthyldiglycol par exemple, par ultrafiltration (7), les substances dissoutes contenues dans les solutions utilisées pour la fabrication, afin de permettre leur réutilisation. Le procédé présente comme avantage de réduire de manière importante les coûts en ce qui concerne les matériaux et l'énergie, et de réduire également la production de déchets, voire d'éviter totalement cette dernière.
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
Vantico Ag
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