Appeal No. 2001-2028 2
Application No. 09/141,163
THE INVENTION
The invention is directed to a process for preparing a cyclopropane carboxylate of a
lower alcohol by esterifying cyclopropane carboxylic acid with a lower alcohol. Specific
process conditions are directed to the stoichiometry and temperature of the reaction. The
process provides for the distillation of the unreacted components. Additional limitations
are described in the following illustrative claims.
THE CLAIMS
Claims 1, 2, and 4 are illustrative of appellants’ invention and are reproduced
below:
1. A process for preparing a cyclopropanecarboxylate of a lower alcohol
which comprises:
(1) esterifying a cyclopropanecarboxylic acid with a lower alcohol in the
presence of an acid catalyst, wherein the cyclopropanecarboxylic acid is present in a
stoichiometric excess with respect to the lower alcohol, wherein said stoichiometric
excess is 2 to 1000 times while maintaining the temperature in the range of from
100 to 200oC; and
(2) distilling off the cyclopropanecarboxylate together with the water of
reaction and small amounts of the lower alcohol.
2. The process as claimed in Clam 1, wherein the temperature is
maintained in the range of from 120 to 200oC.
4. The process as claimed in Clam 1, wherein the acid catalyst is selected
from the group consisting of sulfuric acid, an ion exchange resin containing sulfonic
acid groups and a sulfonic acid.
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