Process for producing 2-hydroxyphenyl lower alkyl ketones
CA 1261877 A · Owner: Celanese Corporation · Inventors: Gupta, Balaram B.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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The production of 2-hydroxyphenyl lower alkyl ketones, e.g. 2-hydroxyacetophenone, by reaction of phenol and a lower alkanoic acid, e.g. acetic acid is carried out by, contacting the phenol and acid at an elevated temperature with a ZSM-5 zeolite catalyst having the formula: 0.9?0.2M2/nO:W2O3:5-100YO2:ZH2O, wherein M is a cation n is the valence of said cation, W is, selected from the group consisting of aluminum and gallium Y, is selected from the group consisting of silicon and germanium and z is from 0 to 40, and in which at least about 80% of the cations are replaced with hydrogen ions. Preferably the catalyst has the formula:, 0.9?0.2M2/nO Al2O3 5-100SiO2:ZH2O and M is selected from …
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.