Removal of carbon dioxide from gases by aqueous amine solutions containing a sterically hindered amine
First Claim
Patent Images
1. A method for absorbing sour gases from a fluid stream comprising:
- providing an absorbent aqueous solution with an amine component, the amine component consisting essentially of,a first amine component selected from the group consisting of piperazine, 1,3-diaminopropane, and mixtures thereof, the first amine component being 70-85 wt. % of the total amine content of the aqueous solution, anda second amine component consisting of one or more sterically hindered amines in an amount of from 15-30 wt. % of the total amine content of the aqueous solution, andbringing the fluid stream into contact with the absorbent at a partial pressure of the sour gases of <
200 mbar in the fluid stream, absorbing the sour gases and producing an absorbent laden with sour gases.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for removing acid gases from a fluid flow using an absorbent including an aqueous solution with at least two different amines. An amine in a proportion of greater than 50 wt. % of the total amine amount in the aqueous solution is the first amine component in the aqueous solution, and a sterically hindered amine in a proportion of less than 50 wt. % is the second amine component in the aqueous solution. The fluid flow is brought into contact with the absorbent at a partial pressure of <200 mbar.
13 Citations
17 Claims
-
1. A method for absorbing sour gases from a fluid stream comprising:
-
providing an absorbent aqueous solution with an amine component, the amine component consisting essentially of, a first amine component selected from the group consisting of piperazine, 1,3-diaminopropane, and mixtures thereof, the first amine component being 70-85 wt. % of the total amine content of the aqueous solution, and a second amine component consisting of one or more sterically hindered amines in an amount of from 15-30 wt. % of the total amine content of the aqueous solution, and bringing the fluid stream into contact with the absorbent at a partial pressure of the sour gases of <
200 mbar in the fluid stream, absorbing the sour gases and producing an absorbent laden with sour gases. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 11, 12, 13, 14, 15, 16, 17)
-
-
7. A method for removing sour gases from a fluid stream comprising:
-
a) providing an absorbent in an aqueous solution with an amine component, the amine component consisting of ai) a first amine component selected from the group consisting of piperazine, 1,3 diaminopropane, and mixtures thereof, the first amine component being 70-85 wt. % of the total amine content of the aqueous solution, and aii) a second amine component consisting of one or more sterically hindered amines in an amount of from 15-30 wt. % of the total amine content in the aqueous solution, b) bringing the fluid stream into contact with the absorbent at a partial pressure of the sour gases of <
200 mbar in the fluid stream, absorbing the sour gases and producing an absorbent laden with sour gases,c) heating the absorbent laden with sour gases to remove sour gases from the absorbent, and cooling d) recycling the cooled absorbent to step a). - View Dependent Claims (10)
-
Specification