Process for the hydrogenation treatment of mineral oils contaminated with chlorobiphenyls and the like
CA 1297063 C · Owner: Holighaus, Rolf · Inventors: Holighaus, Rolf; Dohler, Werner; Niemann, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An hydrogenation process for treating mineral oils and in, particular so-called waste oils which have been contaminated with, chlorobiphenyls bromobiphenyls, chlorinated naphthalines and terphenyls, or other chloraromatics as well as chloroparaffina or chloronaphthenes for the purpose of the recovery of waste oils which contain chlorine on an industrial scale and in which the mineral base oils that are contained as the main components can be reused. The contaminated waste oils are subjected to pressure hydrogenation under conditions typical of a liquid phase hydrogenation or a combined liquid/gas phase hydrogenation with hydrogen pressures of 20 to 325 bar, temperatures of 250 to 500°C and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.