Preparation of alkyl cyanoacetates
AssigneeBASF SE
InventorsHelmut Reichelt, Clemens Grund
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Abstract
A process for the preparation of C.sub.4 -C.sub.10 alkyl cyanoacetates by the reaction of cyanoacetic acid with C.sub.4 -C.sub.10 alkanols at a temperature of from 35.degree. to 150.degree. C. and under a pressure of from 70 to 1013 mbar, in the presence of catalytic amounts of acid, while a C.sub.4 -C.sub.10 alkanol/water azeotrope is separated during the reaction.
Claims5
A process for the preparation of a C.sub.4 -C.sub.10 alkyl cyanoacetate by the reaction of cyanoacetic acid with a C.sub.4 -C.sub.10 alkanol, comprising reacting cyanoacetic acid in an aqueous medium, with from 5 to 30 times its molar amount of a C.sub.4 -C.sub.10 alkanol at a temperature of from 35.degree. to 150.degree. and under a pressure of from 70 to 1013 mbar, in the presence of a catalytic amount of an acid, while a C.sub.4 -C.sub.10 alkanol/water azeotrope is separated during the reaction, and wherein said cyanoacetic acid is not extracted from said aqueous medium prior to esterification.
Dependencies are inferred from the claim text.