Process for extracting pyridine- and quinolinedicarboxylic acids from aqueous media
AssigneeAmerican Cyanamid Company
InventorRichard L. Yager
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Abstract
The present invention provides a process for extracting pyridine- and quinolinedicarboxylic acids from aqueous media. The pyridine- and quinolinedicarboxylic acids are useful in the preparation of herbicidal 2-(2-imidazolin-2-yl)nicotinate and quinoline-3-carboxylate compounds.
Claims17
A process for extracting a pyridine- or quinolinedicarboxylic acid from an aqueous medium which comprises mixing the aqueous medium with a binary solvent system which comprises a water soluble solvent and aromatic hydrocarbon separating the binary solvent system to obtain a solution of the pyridine- or quinolinedicarboxylic acid and optionally distilling said solution.
Dependencies are inferred from the claim text.