Process for the manufacture of alkylaminoalkanol
AssigneePennwalt Corporation
InventorDavid M. Gardner
Life of this patent
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Abstract
Color-stable alkylaminoalkanol is prepared by adding, prior to stripping-off excess reactant, an alkali metal borohydride to the reaction product of alkylene oxide and an excess of primary or secondary amine and thereafter distilling the reaction mass to recover residual and reacted (borates) alkali metal borohydride and reduced color-forming bodies as bottoms and alkylaminoalkanol as distillate. If water is present in the reaction between the alkylene oxide and primary or secondary amine, the reaction mass is distilled after recovery of excess amine to recover an azeotrope of the product which is recycled to the reactor.
Claims6
In a process for preparing a color-stable alkylaminoalkanol by the reaction of alkylene oxide with an excess of the class of ammonia and a primary or secondary amine to form a reaction mass, the improvement which comprises the steps of (1) adding to the product of the reaction prior to removal of excess amine at least about one mole of alkali metal borohydride per 1650 mole of alkylene oxide used in the reaction (2) stripping-off excess amine reactant and (3) distilling the resultant reaction mass to recover the alkali metal borohydride and color-forming bodies as bottoms and alkylaminoalkanol as distillate.
Dependencies are inferred from the claim text.