C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 7/06 (2006.01) A23C 7/02 (2006.01) B08B 3/10 (2006.01) C11D 3/02 (2006.01) C11D 3/20 (2006.01) C11D 11/00 (2006.01)
Patent
CA 2248080
The aqueous alkaline cleaning agent proposed contains, as its hydroxide constituent, only potassium hydroxide or a mixture of potassium hydroxide and another alkali, the potassium hydroxide content being at least 20 % by wt., calculated as hydroxide, relative to the total amount of hydroxide present in the agent. The agent proposed enables cleaning to be carried out much more economically than with prior art agents. The method according to the invention includes regeneration of the cleaning agent by means of membrane filtration.
Le nettoyant alcalin aqueux décrit contient, comme constituant hydroxyde, uniquement de l'hydroxyde de potassium ou un mélange d'hydroxyde de potassium et d'un autre alcali, la teneur en hydroxyde de potassium étant d'au moins 20 % en poids, exprimée sous forme d'hydroxyde, par rapport à la quantité totale d'hydroxyde présente dans le nettoyant. Ce dernier permet un nettoyage beaucoup plus économique que les nettoyants de la technique antérieure. Le procédé selon l'invention comprend la régénération du nettoyant par filtration sur membrane.
Krack Ralf
Patten Anja
Rossner Dietmar
Henkel-Ecolab Gmbh & Co. Ohg
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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