Amino-siloxane composition and methods of using the same
An amino-siloxane composition is presented. The amino-siloxane composition includes structure (I): wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; R 2 is a C 3 -C 4 aliphatic radical; R 3 is a C 1 -C 5 aliphatic radical or R 4 , wherein R 4 comprises structure (II): and X is an electron donating group. Methods of reducing an amount of carbon dioxide in a process stream using the amino-siloxane composition are also presented.
1. An amino-siloxane composition comprising structure (I):
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; R 2 is a C 3 -C 4 aliphatic radical; R 3 is a C 1 -C 5 aliphatic radical or R 4 , wherein R 4 comprises structure (II):
and
X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
2. The amino-siloxane composition according to claim 1 comprising structure (Ia):
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; R 2 is a C 3 -C 4 aliphatic radical; and X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
3. The amino-siloxane composition according to claim 1 comprising structure (Ib):
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; and X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
4. The amino-siloxane composition according to claim 1 comprising structure (Ic):
wherein X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
5. The amino-siloxane composition according to claim 1 , wherein X comprises a CH 3 O— group; a C 2 H 5 O— group; or a morpholine group.
6. A reaction product of the amino-siloxane composition of claim 1 with carbon dioxide.
7. An adduct of an amino-siloxane having structure (I) and carbon dioxide
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; R 2 is a C 3 -C 4 aliphatic radical; R 3 is a C 1 -C 5 aliphatic radical or R 4 , wherein R 4 comprises structure (II):
and
X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical, wherein the adduct is liquid under ambient conditions.
8. The adduct according to claim 7 , wherein X comprises a CH 3 O— group; a C 2 H 5 O— group; or a morpholine group.
9. The adduct according to claim 7 , wherein the amino-siloxane has structure (Ia):
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; R 2 is a C 3 -C 4 aliphatic radical; and X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
10. The adduct according to claim 7 , wherein the amino-siloxane has structure (Ib):
wherein R 1 is independently at each occurrence a C 1 -C 5 aliphatic radical; and X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.
11. The adduct according to claim 7 , wherein the amino-siloxane has structure (Ic):
wherein X comprises an R 5 O— group; an R 5 S group; or a morpholine group, wherein R 5 is independently at each occurrence a C 1 -C 5 aliphatic radical.