Process for the separation of solvents from hydrocarbons dissolved in said solvents
CA 1286612 C · Owner: Rijkens, Hendrik Cornelis · Inventors: Rijkens, Hendrik Cornelis; Bitter, Johan George Albert; Haan, Johannes Pieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the separation of solvents from hydrocarbons dissolved in said solvents by contacting a feed solution (e.g. obtained from a dewaxing unit) comprising hydrocarbons dissolved in an aromatic solvent and a polar aliphatic solvent (e.g. toluene and methyl ethyl ketone) at elevated pressure with one side of a dense membrane which is substantially impermeable to said hydrocarbons and which membrane comprises a layer of a halogen-substituted silicone compound comprising units according to the general formula:, wherein R1 and R2 represent moieties chosen from the group consisting of hydrogen, halogen, alkyl aryl, aralkyl and, halogen-substituted alkyl aryl and aralkyl moieties, 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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.