Improved catalytic method for the reductive amination of poly(oxytetramethylene) glycols.

摘要

Poly(oxytetramethylene) diamines having the formula: H2N-CH2-CH2-CH2-CH2-[-O-CH2-CH2-CH2-CH2-]n-O-CH2-CH2-CH2-CH2-NH2 wherein n is 0 or 1 to 50, can be obtained in good yield and selectivity by the reductive amination of a poly(oxytetramethylene) glycol having the formula: HO-CH2-CH2-CH2-CH2-[-O-CH2-CH2-CH2-CH2-]n-O-CH2-CH2-CH2-CH2-OH wherein n is 0 to 50, when using a catalyst comprising, on an oxide-free basis, from 70 to 78 wt.% of nickel, 20 to 25 wt.% of copper, 0.5 to 5 wt.% of chromium, and 1 to 5 wt.% of molybdenum.