Process for producing t-butyl methacrylate
CA 1290344 C · Owner: Inoue, Kazutaka · Inventors: Inoue, Kazutaka; Sato, Toshihiro; Kobayashi, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing methacrylic acid which comprises reacting methacrylic acid and isobutylene in the presence of a sulfonic acid groupcontaining ion exchange resin by a continuous process while controlling the reaction at a reaction temperature of -20°C to +20°C so as to fulfil the following relation: y < 100 - 50x, wherein x is the ratio of the total molar number of isobutylene and its reaction products to the total molar number of methacrylic acid and its reaction products and y is conversion (%) of isobutylene, followed by degassing the unreacted isobutylene, distilling off the low boiling substances by distillation under reduced pressure and, then sending the remainder to a t-butyl …
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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 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
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.