Process for the purification of linear paraffin
CA 1340141 C · Owner: Dickson, Charles Thomas · Inventors: Schreiner, James Louis; Britton, Robert Alexander; Dickson, Charles Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for purifying linear paraffins in which a hydrocarbon stream containing linear paraffins contaminated with aromatics, sulfur-, nitrogen-, and oxygen-containing compounds, and color bodies, but essentially free of olefins, is contacted with a zeolitic solid absorbent such as a NaX zeolite or zeolite MgY. After absorption the zeolitic solid absorbent is desorbed with an alkyl-substituted aromatic desorbent such as toluene.
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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 November 24, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 2015.
- 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.