Tertiary alkanolamine absorbent containing an ethyleneamine prom

Details Tertiary alkanolamine absorbent containing an ethyleneamine prom Tertiary alkanolamine absorbent containing an ethyleneamine prom

1987-02-05

1989-03-21

Thexton, Matthew A.

Compositions

Co, s, negative element, or acid, bindant containing

252190, C09K 300

Patent

active

048141046

ABSTRACT:
Absorption of carbon dioxide from gas mixtures with aqueous absorbent solutions of tertiary alkanolamines is improved by incorporating at least one alkyleneamine in the solution. The presence of the alkyleneamine promotes the rate of carbon dioxide absorption and the carbon dioxide capacity of the aqueous tertiary alkanolamine solution. As a result, absorption can be carried out in shorter absorber columns, and process energy requirements can be lowered by reducing the rate at which the absorbent solution is circulated.

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Sterically Hindered Amines for CO.sub.2 Removal from Gases, Ind. Engr. Chem. Fund., vol. 22, pp. 239-249 (1983).

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