Catalytic hydrolysis of COS in acid gas removal solvents
AssigneeAir Products and Chemicals, Inc.
InventorsMichael S. Chen, James T. Edwards, William R. Ernst
Life of this patent
Estimating the term…
Abstract
Hydrolysis of COS in gas streams to H.sub.2 S and CO.sub.2 can be improved by the addition of certain bicyclo amine catalysts to acid gas removal solvents.
Claims14
A process for hydrolyzing COS present in a gas stream to H.sub.2 S and CO.sub.2 comprising contacting said gas stream with an acid gas removal solvent, and adding a bicyclo tertiary amine in a concentration range of 0.02 to 8.0 g-mole/l to said acid gas removal solvent, said bicyclo tertiary amine having the general formula:
- ##STR5## wherein X represents H--C or N;
- R and R' represent H, CH.sub.3 or C.sub.2 H.sub.5 --;
- R" represents H or CH.sub.3 -- only if R' is not C.sub.2 H.sub.5 ;
- and m, p and q.gtoreq.1.
A process for hydrolyzing COS present in a gas stream to H.sub.2 S and Co.sub.2 comprising contacting said gas stream with an acid gas removal solvent and adding a bicyclo amidine in a concentration range of 0.02 to 8.0 g-mole/l to said acid gas removal solvent, said bicyclo amidine having the general formula:
- ##STR6## wherein R represents H, CH.sub.3 -- or C.sub.2 H.sub.5 --;
- m is 3, 4, or 5;
- and p is 2, 3 or 4.
Dependencies are inferred from the claim text.