Process for preparing propylene oxide and butylene oxide
CA 1305159 C · Owner: The Dow Chemical Company · Inventors: Mcconchie, Garnet E.; Hollmann, Hans-Gunter; Mark, Frank E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Propylene oxide is prepared from a propylene glycol diester by hydrolyzing the propylene glycol diester at least partially to the corresponding hydroxyester and eliminating earboxylic acid from the hydroxyester. The propylene glycol diester has been produced by reacting a 1,2-dihalogenopropane with an alkali metal or alkallne earth metal salt of a carboxylic acid within a single phase reaction medium comprising an organic liquid reactlon diluent wherein the inorganic salt formed during the reaction is insoluble.
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
- Granted July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
- 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.