Treatment of oil contaminated water
CA 1103170 A · Owner: Rohm And Haas Company · Inventors: Fox, Chester R.; Janke, Robert F.; Mcdonnell, Roger P. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A process for recovering oil from a large volume of water contaminated with said oil is disclosed. The process comprises the steps of passing the oil-contaminated water through a column containing a polymeric adsorbent which is capable of preferentially adsorbing the oil, passing substantially oil-free water from said column regenerating, the polymeric adsorbent by eluting the adsorbed oil with an aqueous solution of a non-ionic surfactant at a pH of from about 9 to about 13 said surfactant conforming to the formula RNH(CH2CH2O)nH wherein R is an alkyl group of from 10 to 24 carbon atoms, and n is from 1 to 25, adjusting the pH of the oil-containing eluent to from …
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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 June 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
- 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.