Reclamation of alkanolamine solutions

Details Reclamation of alkanolamine solutions Reclamation of alkanolamine solutions

1990-12-17

1992-04-28

Lewis, Michael

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

203 28, 203 96, 423228, 423229, 564497, C07C21512, B01D 310, B01D 5314

Patent

active

051085518

ABSTRACT:
The present invention provides a method for purifying alkanolamine solutions which have lost at least a portion of their acid gas sorption capacity due to degradation of the alkanolamine into heat stable salts. Particularly, it has been found that the alkanolamine solution may be rejuvenated by charging the solution to the feed zone of a distillation column reactor at temperatures above about 160.degree. C. and pressure of less than about 2000 mm Hg.

REFERENCES:
patent: 4079117 (1978-03-01), Butwell
patent: 4113837 (1978-09-01), Kendall et al.
patent: 4343777 (1982-08-01), Dannhorn et al.
patent: 4389383 (1983-06-01), Sokolik, Jr. et al.
patent: 4514379 (1985-04-01), Miller
patent: 4795565 (1989-01-01), Yan
Treybal, R. E. "Mass-Transfer Operations", New York:McGraw Hill (1955), pp. 291-293 and 310.
K. F. Butwell, D. J. Kubec and P. W. Sigmund, "Alkanolamine Treating", Hydrocarbon Processing, Mar., 1982.

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