Obtaining anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate
CA 1238919 A · Owner: Basf Aktiengesellschaft · Inventors: Irnich, Rudolf; Bott, Kaspar; Kaibel, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Anhydrous of substantially anhydrous formic acid is obtained by hydrolysis of methyl formate by a process in which, methyl formate is hydrolyzed in the presence of a carboxamide of the general formula (I): (I), where R1 is alkyl or hydrogen, R2 is alkyl R3 is hydrogen, or a C1 to C4 alkyl, and R1 and R2 may form part of a 5membered or 6-membered ring, and the sum of the carbon atoms in the radicals R1, R2 and R3 is from 1 to 14. The mixture formed during the hydrolysis is separated into its individual components in a first distillation column which is divided into a feed part and a take-off part by separating means which are effective in the longitudinal direction. During the process the …
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 July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
- 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.