Method for the treatment of work pieces with a palladium...

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 9/02 (2006.01) B01D 61/02 (2006.01) B01D 61/14 (2006.01) C22B 61/00 (2006.01) C23C 18/16 (2006.01) C25D 21/20 (2006.01)

Patent

CA 2404620

The invention relates to a method for the treatment of work pieces with a palladium colloid solution by bringing the work pieces into contact with the colloid solution, palladium being recovered after the use of the colloid solution. This is achieved by separating palladium colloid particles from the colloid liquid by means of a molecular filter. With this method it is easy to continuously and largely completely separate palladium from the spent processing solutions without investing large amounts of chemicals, energy and time. The spent processing solution may especially be worked up after separation of the part of the solution containing palladium such that palladium can be recovered completely and be reused for further processing.

L'invention concerne un procédé destiné à traiter des pièces à usiner au moyen d'une solution colloïdale de palladium par mise en contact de ces pièces à usiner avec la solution colloïdale, le palladium étant recouvert après l'utilisation de cette solution colloïdale. Pour ce faire, on sépare des particules colloïdales de palladium du liquide colloïdal à l'aide d'un filtre moléculaire. Grâce à ce procédé, on peut facilement séparer la totalité du palladium des solutions de traitement utilisées de manière continue, en peu de temps et sans faire intervenir une quantité importante de produits chimiques et d'énergie. La solution de traitement utilisée peut notamment être traitée après la séparation de la partie de la solution contenant le palladium de façon que ce palladium puisse être entièrement récupéré et réutilisé en vue d'un traitement ultérieur.

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