Absorbent composition containing a tertiary amino azabicyclic alcohol and an amine salt
First Claim
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1. A composition comprising:
- (1) at least one tertiary amino azabicyclic alcohol and (2) an amine salt, said amine salt being the reaction product of said azabicyclic alcohol and a component selected from the group consisting of an acid having at least one pKa of not more than about 7, a decomposable salt of an acid having at least one pKa of not more than about 7, a compound capable of forming an acid having a pKa of not more than about 7 and a mixtures thereof, said amine salt and said tertiary azabicyclic alcohol being present in said composition in a mole ratio of said amine salt to said tertiary amino azabicyclic alcohol of at least about 0.2;
1 to 4;
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Abstract
A new alkaline absorbent solution containing a tertiary amino azabicyclic alcohol in combination with its salt with a strong acid and/or in combination with a severely-hindered aminoacid is provided. A process for the removal of H2 S from fluid mixtures using this absorbent solution to produce a very low level of H2 S in the treated fluid is also provided. The process is also suitable for the selective removal of H2 S from fluid mixtures comprising H2 S and CO2. Use of the above absorbent solution leads to higher selectivity for H2 S without damaging capacity than observed when the tertiary amino azabicyclic alcohol is used alone without additive.
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10 Claims
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1. A composition comprising:
- (1) at least one tertiary amino azabicyclic alcohol and (2) an amine salt, said amine salt being the reaction product of said azabicyclic alcohol and a component selected from the group consisting of an acid having at least one pKa of not more than about 7, a decomposable salt of an acid having at least one pKa of not more than about 7, a compound capable of forming an acid having a pKa of not more than about 7 and a mixtures thereof, said amine salt and said tertiary azabicyclic alcohol being present in said composition in a mole ratio of said amine salt to said tertiary amino azabicyclic alcohol of at least about 0.2;
1 to 4;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- (1) at least one tertiary amino azabicyclic alcohol and (2) an amine salt, said amine salt being the reaction product of said azabicyclic alcohol and a component selected from the group consisting of an acid having at least one pKa of not more than about 7, a decomposable salt of an acid having at least one pKa of not more than about 7, a compound capable of forming an acid having a pKa of not more than about 7 and a mixtures thereof, said amine salt and said tertiary azabicyclic alcohol being present in said composition in a mole ratio of said amine salt to said tertiary amino azabicyclic alcohol of at least about 0.2;
Specification