Cogeneration of isobutylene plus mtbe from crude t-butanol/methanol feedstocks
CA 2092969 A1 · Owner: Huntsman Specialty Chemicals Corporation · Inventors: Knifton, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
THE COGENERATION OF ISOBUTYLENE PLUS MTBE FROM CRUDE t-BUTANOL/METHANOL FEEDSTOCKS (D#81,164-F), ABSTRACT OF THE DISCLOSURE Disclosed is an improvement in a method for cogeneration of isobutylene and MTBE by etherification of tBA/MeOH over an ion-exchange resin which allows for more complete conversion of the remaining tBA fraction and comprises a second step consisting essentially of recovering the MTBE from the primary fractionator as an overhead fraction and etherifying the bottoms from the primary fractionator over an inorganic acid catalyst comprising a crystalline aluminosilicate faujasite-type Y-zeolite modified with a compound selected from a fluoride-containing compound including …
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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
- Filed March 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.