Extraction of hydrocarbon oils using a combination polar extraction solvent-aliphatic-aromatic or polar extraction solvent-polar substituted naphthenes extraction solvent mixtures
CA 1289098 C · Owner: Exxon Research And Engineering Company · Inventors: Bell, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydrocarbon oils particularly petroleum, oils, more particularly lube transformer, white oil, and other specialty oils can be extracted to remove aromatic hydrocarbon components therefrom using a combination polar extraction solvent, such as n-methyl pyrrolidone phenol or furfural, preferably NMP in combination with aliphatic-aromatics, polar naphthenes or morpholine, preferably alkylbenzene, mixed extraction solvent. The combination of polar extraction solvent and aliphatic-aromatic, polar naphthene or morpholine extraction solvent mixture contains and from 1 to up to but not including 10 LV% aliphatic-aromatic polar, naphthene or morpholine and mixtures thereof prefer-, ably from 2.5 to …
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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 September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.