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US 6,720,444 B2Granted
Aminonitrile production
AssigneeE. I. Du Pont de Nemours and Company
InventorAlex Sergey Ionkin
Life of this patent
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Abstract
Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and tetraalkylammonium hydroxide and/or tetraalkylphosphonium hydroxide additive.
Claims14
A process for the partial hydrogenation of a dinitrile to an aminonitrile, comprising the step of contacting the dinitrile with a hydrogen-containing fluid in the presence of (a) a solvent comprising liquid ammonia, an alcohol or both;(b) a hydrogenation catalyst;
- and (c) an effective amount of additive comprising a compound selected from the group consisting of a tetraalkylammonium hydroxide compound and a tetraalkylphosphonium hydroxide compound.
Dependencies are inferred from the claim text.