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US 4,541,961 AGranted
Nitrile purification
AssigneeEthyl Corporation
InventorRobert I. Davidson
Life of this patent
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Abstract
Nitriles, such as 2-(2-fluoro-4-biphenyl)propionitrile, contaminated with ketones having similar boiling points are purified by treating the nitrile/ketone mixture with an alkali metal borohydride, e.g., sodium borohydride, to complex the ketone. After complexing of the ketone, the nitrile can be separated therefrom by distillation.
Claims9
A process for separating a nitrile from a ketone having a boiling point so similar as to make simple distillation an ineffective way of separating them, which process comprises treating the nitrile/ketone mixture with an alkali metal borohydride so as to complex the ketone.
Dependencies are inferred from the claim text.