C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
196/53
C10M 175/02 (2006.01) C09B 29/08 (2006.01) C10M 175/00 (2006.01) A62D 3/00 (2006.01)
Patent
CA 1314257
26982-31 ABSTRACT A method for hydrotreating used oils to second raffin- ates in the form of lubricating oils is provided wherein ecologic- ally undesired byproducts or wastes are avoided without requiring expensive separating steps or reaction conditions or the use of costly catalysts. In particular, with this process highly con- taminated used oils, i.e. those having organochlorines, particularly PCB, chlorinated dioxins and dipherylene oxides, in concentrations above a certain limit, are likewise again usable as a second raffinate, particularly as lubricating oil; thus, they must no longer be destroyed, for example, in a high temperature inciner- ation process. For this purpose the used oil is first of all merely freed from coarse solids and subsequently with the addition of hydrogen subjected to liquid-phase hydrogenation at pressures of preferably 150 bar and temperatures of preferably 350°C. There- after, the reaction products are separated into the lubricating oil and in particular solids-bearing byproducts.
572115
Jankowski Alfons
Langhoff Josef
Weber Harald
Fetherstonhaugh & Co.
Ruhrkohle Ag
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