Process for regenerating a liquid absorbent
AssigneeCommonwealth Scientific and Industrial Research Organisation
InventorsGraeme Puxty, Michael Webster-Gardiner, William Conway, Qi Yang, Robert Bennett, Paul Feron
Life of this patent
Estimating the term…
Abstract
The invention provides a process for regenerating a liquid absorbent, comprising: contacting the liquid absorbent with a hydrophobic medium, wherein the liquid absorbent comprises at least one amine of Formula (I) and degradation product thereof comprising at least one imine of Formula (II), wherein each Ar is independently an aromatic group and each R is independently selected from hydrogen, an organyl group and NH2; and selectively extracting the degradation product into or through the hydrophobic medium.
Claims20
A method for absorbing an acid gas from a gas stream containing the acid gas and dioxygen (O2), the method comprising contacting the gas stream with a liquid absorbent comprising:
- i) at least one amine of Formula (I):
- and
- ii) at least one aliphatic amine,
- wherein the compound of Formula (I) is selectively degraded by the O2 to form a degradation product comprising at least one imine of Formula (II):
- wherein, in the amine of Formula (I) and the imine of Formula (II), each Ar is independently an aromatic group and each R is independently selected from hydrogen, an organyl group and NH2,
- wherein the selective degradation of the compound of Formula (I) inhibits degradation of the at least one aliphatic amine.
Dependencies are inferred from the claim text.