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US 4,096,085 AGranted
Gas scrubbing system
AssigneeThe Dow Chemical Company
InventorsSmallwood Holoman Jr., Robert G. Asperger, Leroy S. Krawczyk
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AssigneeThe Dow Chemical Company
InventorsSmallwood Holoman Jr., Robert G. Asperger, Leroy S. Krawczyk
Estimating the term…
An aqueous organic amine acid gas scrubbing system, particularly an aqueous N-methyldiethanolamine or diethanolamine acid gas scrubbing system having incorporated therein (1) a compound or mixture of compounds having the formula ##STR1## wherein n is an integer from 1 to 3, m is an integer from 2 to a number sufficient to yield a molecular weight of about 800, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently selected from the group consisting of --H, --C.sub.n' H.sub.2n' OH, --C.sub.n' H.sub.2n'+1, --C.sub.n' H.sub.2n' N(R.sub.3)R.sub.4 wherein n' is an integer from 1 to 2 and wherein R.sub.1 -R.sub.3 and R.sub.2 -R.sub.4 may be joined to form cyclic amines when n is 2; said compound being present in about 10 to about 2000 parts per million parts of treating solution; (2) copper or a copper ion yielding compound in from 0 to 1000 ppm; and (3) sulfur or a sulfur atom yielding compound in from 0 to 1000 ppm.
A corrosion inhibited aqueous N-methyldiethanolamine or diethanolamine acid gas treating solution consisting essentially of (1) an amine compound or mixture of compounds having the formula ##STR3## wherein n is an integer from 1 to 3, m is an integer 2 to an integer to yield a molecular weight of about 800 and each R represents a member selected from the group consisting of --H, --C.sub.n,H.sub.2n',OH, C.sub.n,H.sub.2n', or --C.sub.n,H.sub.2n',N(R.sub.3)R.sub.4, n' is an integer from 1 to 2, and wherein R.sub.1 R.sub.3 and R.sub.2 R.sub.4 are joined together and n' is 2;
Dependencies are inferred from the claim text.