Process for treating effluents originating from the preparation of hydrocarbon resins
CA 2045189 A1 · Owner: Biddau, Gianfranco · Inventors: Messina, Giuseppe; Biddau, Gianfranco; Cappellazzo, Oscar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of hydrodechlorination of effluents originating from the preparation of hydrocarbon resins is described the effluents, consisting of about 90% of unconverted monomers and containing between 600 and 2500 ppm of organic chlorine. Said hydrodechlorination process comprises subjecting the said effluents to hydrogenation at a temperature of between 200 and 300°C in the presence of a catalyst, preferably consisting of Ni- Mo supported on ?-Al203.
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
- Filed June 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2013.
- 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.