B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
252/30, 23/356,
B01D 53/34 (2006.01) B01D 53/14 (2006.01)
Patent
CA 1089842
ABSTRACT OF THE DISCLOSURE Acidic gases are substantially removed from a normally gaseous mixture by a process comprising contacting the normally gaseous mixture with an amine-solvent liquid absorbent comprising (1) an amine mixture comprised of at least about 50 mol % of a sterically hindered amine and at least about 10 mol % of a tertiary amine alcohol, wherein said sterically hindered amine contains at least one secondary amino group which is part of a ring and is attached to either a secondary or tertiary carbon atom or a primary amino group attached to a tertiary carbon atom, and (ii) a solvent for said amine mixture which is also a physical absorbent for said acidic gases. The liquid absorbent may also include up to about 35 weight percent water. The coaction of the sterically hindered amine and the tertiary amino alcohol in conjunction with the solvent pro- vides an increase in the amount of CO2 containing acidic gases absorbed compared to the use of the same sterically hindered amines alone and lowers the heat of reaction.
293446
Sartori Guido
Savage David W.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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