Process for the preparation of monocarboxylic anhydrides
CA 1307293 C · Owner: Trabold, Peter · Inventors: Luft, Gerhard; Trabold, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of monocarboxylic anhydrides, Abstract of the disclosure In the process for the preparation of monocarboxylic anhydrides of the general formula (RCO)2O by reacting a carboxylic acid ester of dialkyl ether of the general formula RCOOR or ROR, where R in each case denotes the same alkyl radical having 1 to 4 carbon atoms with, carbon monoxide in the gas phase in the presence of iodine or bromine or compounds thereof as reaction promoter, and in the presence of a supported catalyst at, temperatures of from 130 to 400°C and pressures of from 1 to 150 bar, where, in the supported catalyst an organo-, silicon compound is bonded as a polyfunctional coupling, agent, on …
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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 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 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.
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.