Liquid salt extraction of aromatics from process feed streams
CA 1164892 A · Owner: Exxon Research And Engineering Company · Inventors: Howard, Kent A.; Mitchell, Howard L.; Waghorne, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid salts such as quarternary phosphonium and ammonium salts of halides, acids, or more complex anions can be utilized to extract aromatics from mixed aliphatic/ aromatic hydrocarbon feeds such as isomerization process feed streams, cat naphthas, lube stocks and the like. Such salts show the required solubilities in various solvents to exhibit a distinct selectivity advantage over more commonly used extraction solvents such as sulfolane in the extraction of benzene and other aromatics from heptane and other aliphatic feedstreams.
Read the whole patent
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 April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- 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.