Purification and decolorization of off-color alkyl alkanolamines

Details Purification and decolorization of off-color alkyl alkanolamines Purification and decolorization of off-color alkyl alkanolamines

1992-09-01

1993-05-04

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

C07C21300

Patent

active

052083772

ABSTRACT:
Off-color N-(C.sub.4 -C.sub.10)alkyl di(C.sub.2 -C.sub.3) alkanolamines purified and decolorized by vacuum distillation at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the presence of water and or water-soluble metal borohydride whereby the distilled alkanolamine has a reduced APHA color rating which is maintained on storage.

REFERENCES:
patent: 3207790 (1965-09-01), Glew et al.
patent: 3453183 (1969-07-01), Okubo et al.
patent: 4379024 (1983-04-01), Gardner
Antropov et al. "Effect of the Structure of Inhibitors, etc." Chem. Abst. vol. 76, No. 17 (1972) p. 208, Abst #102747k.

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