Process for the preparation of polyoxyalkylene polyamines

Details Process for the preparation of polyoxyalkylene polyamines Process for the preparation of polyoxyalkylene polyamines

1985-03-01

1988-08-23

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564475, 564480, C07C 8502, C07C 8506

Patent

active

047662450

ABSTRACT:
An improved method for the manufacture of high molecular weight polyoxyalkylene amines wherein a hydroxy-terminated polyoxyalkylene compound having a molecular weight of at least 500 is reacted with ammonia in the presence of hydrogen and Raney nickel/aluminum under anhydrous reductive amination conditions to provide the corresponding polyoxyalkylene amine in good yield and selectivity.
The Raney nickel/aluminum is a nickel/aluminum alloy treated with a base, such as sodium hydroxide, so as to only partially leach the aluminum from the alloy, such that the final product contains from about 60 wt. % to about 75 wt. % of nickel and, correspondingly, from about 25 wt. % to about 40 wt. % of aluminum and is preferably used in nugget form.

REFERENCES:
patent: 3270059 (1966-08-01), Winderl
patent: 3347926 (1967-10-01), Zech
patent: 3847992 (1974-10-01), Hotchkiss
patent: 4181682 (1980-01-01), Watts, Jr. et al.
Organic Syntheses, ed. N. Drake, vol. 21, pp. 15-17 (1941).

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