A process for producing light olefins by catalytic conversion of hydrocarbons
CA 2175656 C · Owner: China Petro-Chemical Corporation · Inventors: Liu, Shunhua; Li, Zaiting; Xie, Chaogang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing light olefins, especially ethylene propylene, isobutylene and isoamylene, together with high octane gasoline as by-product, comprises that petroleum hydrocarbons are contacted with phosphorus and rare earth containing high silica zeolite having a structure of pentasil catalysts and catalytically converted at a temperature of 480° to 680° C and a pressure of 1.2X10 5 to 4.0X10 5Pa, with a contact time of 0.1 to 6 seconds a weight ratio of catalyst to feedstock of 4:1 to 10:1 and a weight ratio of steam to feedstock of 0.01:1 to 0.5:1.
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 November 4, 1994 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.