Recovery of lubricants from used cooling lubricants

Details Recovery of lubricants from used cooling lubricants Recovery of lubricants from used cooling lubricants

C - Chemistry, Metallurgy

10

M

C10M 175/00 (2006.01) C10M 173/00 (2006.01) C10M 175/02 (2006.01) C10M 175/04 (2006.01)

Patent

CA 2744631

The invention relates to a method for recovering lubricant or lubricant concentrate from a used mixture containing lubricant, wherein the substantially dehydrated mixture containing lubricant is subjected to a short path distillation at a tempera-ture of at least 150°C and a pressure of less than 1.5 mbar in order to obtain a lubricant concentrate that is free of very finely abra-ded metal, metal soaps, and polymers and that can be recycled into cooling lubricants.

L'invention porte sur un procédé de récupération d'un lubrifiant ou d'un concentré de lubrifiant à partir d'un mélange contenant des lubrifiants usés, procédé suivant lequel on soumet le mélange contenant les lubrifiants, pour l'essentiel déshydratés, à une distillation à court trajet à une température d'au moins 150°C et sous une pression inférieure à 1,5 mbar, pour obtenir un concentré de lubrifiant, débarrassé des fines métalliques d'abrasion, des savons métalliques et des polymères, réutilisable dans des réfrigérants-lubrifiants.

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