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One step hydroformylation and hydrogenation process for preparing a 1,3-propanediol

CA 2461284 A1 · Owner: Powell, Joseph Broun · Inventors: Knifton, John Frederick; Weider, Paul Richard; Powell, Joseph Broun

CIPO record

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Abstract From the Canadian patent

Process for one-step hydroformylation and hydrogenation synthesis of 1,3propanediol which comprises: (a) contacting a mixture of ethylene oxide, carbon monoxide, hydrogen, a non-water-mixcible reaction solvent and a hydroformylation catalyst composition; (b) heating said reaction mixture to produce a single-phase reaction product mixture containing 1,3-propanediol such that phase separation can be induced by temperature reduction; and (c) inducing phase separation by at least one method selected from the group consisting of: (i) temperature reduction combined with addition of a phase split-inducing agent to the mixture, (ii) temperature reduction combined with first adding a …

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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 September 24, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 24, 2002
GrantedNo grant recorded
Term endedSeptember 24, 2022
Patent numberCA 2461284 A1
Classification (IPC)C07C29/16

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedSep 24, 2002Term endedSep 24, 2022

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.