Method for production of unsaturated carboxylic acid esters
CA 1290767 C · Owner: Nippon Shokubai Kaguku Kogyo Co. Ltd. · Inventors: Yoshida, Hiroshi; Sogabe, Hideki; Okubo, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Production of the corresponding ester of an unsaturated carboxylic acid by the reaction of (meth)acrylic acid with an aliphatic alcohol in the presence of a strongly acidic cation-exchange resin as a catalyst is effected efficient and economically by keeping the reaction solution in a boiling state and, at the same time keeping the, catalyst suspended and dispersed in the reaction solution with a stirrer operated at a required motive force falling in the range of 0.005 to 2kW per m3 of the reaction solution and optionally refluxing the same alcohol into contact with the vapor containing the water formed by the esterification thereby recovering the (meth)acrylic acid being distilled as …
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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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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
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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.