Addition of severely-hindered amine salts and/or aminoacids to non-hindered amine solutions for the absorption of H sub 2 S
Patent
·
OSTI ID:6915838
This patent describes an absorbent composition. It comprises: MDEA and, optionally, at least one other non-hindered amino compound, and an additive of a severely hindered amino acid having a cumulative {minus}E{sub {ital s}} value greater than 1.75. The hindered amino compound being present in the absorbent composition in a mole ratio of the amino acid to the non-hindered hindered amino compound of about 0.01:1 to 4:1, an amine salt. The amine salt being the reaction product of an amine selected from the group consisting of severely hindered amino compounds having a cumulative {minus}E{sub {ital s}} value greater than 1.75, 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 mixtures thereof. The amine salt and the non-hindered amino compound being present in the absorbent composition in a mole ratio of the amine salt to the non-hindered amino compound of about 0.2:1 to 4:1.
- Assignee:
- Exxon Research and Engineering Co., Florham Park, NJ
- Patent Number(s):
- US 4892674; A
- Application Number:
- PPN: US 7106805A
- OSTI ID:
- 6915838
- Country of Publication:
- United States
- Language:
- English
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