Preparation of acrylic acid and methacrylic acid from propylene or isobutylene in a one-reactor, fluid-bed system
CA 1049553 A · Owner: The Standard Oil Company · Inventors: Miller, Arthur F.; Terrill, David B.; Grasselli, Robert K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Acrylic acid and methacrylic acid are prepared by reacting propylene or isobutylene with molecular oxygen at a temperature of about 200° to about 600°C. in a fluid-bed reactor using a catalyst charge containing two different catalysts--the first catalyst being one that is especially effective for preparing the acrolein or methacrolein from the propylene or isobutylene; and the second catalyst being one that is especially effective for preparing acrylic acid or methacrylic acid from acrolein or methacrolein. Unexpectedly high yields of acrylic acid and methacrylic acid are obtained.
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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 February 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 1996.
- 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.