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US 6,476,270 B2Granted
Waste-free process for manufacture of amides and amines from carbonium ion precursors and nitriles
AssigneeRohm and Haas Company
InventorNewman Mayer Bortnick
Life of this patent
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Abstract
A method for preparation of an amine from a carbonium ion precursor and a nitrile. The method comprises the steps of: (a) contacting the carbonium ion precursor and the nitrile with aqueous ammonium hydrogen sulfate to produce an amide; and (b) hydrolyzing the amide to the amine. Optionally, the ammonium hydrogen sulfate, nitrile and ammonia are recovered and recycled.
Claims7
A method for preparation of an amine from a carbonium ion precursor and hydrogen cyanide;
- said method comprising steps of:
- (a) contacting the carbonium ion precursor and hydrogen cyanide with aqueous ammonium hydrogen sulfate at a pressure greater than atmospheric pressure to produce an amide;
- (b) hydrolyzing said amide to the amine to the amine without addition of a hydrolysis catalyst other than ammonium hydrogen sulfate;
- and
- (c) recovering diammonium sulfate and decomposing it by heating to produce ammonia and ammonium hydrogen sulfate.
2 more elements
A method for preparation of an amide from a carbonium ion precursor and a nitrile;
- said method comprising steps of:
- (a) contacting the carbonium ion precursor and the nitrile with aqueous ammonium hydrogen sulfate to produce an amide;
- (b) recovering diammonium sulfate from an aqueous phase;
- and
- (c) decomposing diammonium sulfate by heating to recover ammonia and ammonium hydrogen sulfate.
2 more elements
Dependencies are inferred from the claim text.