REGENERABLE SOLID IMINE SORBENTS
First Claim
Patent Images
1. A sorbent for acid anhydrides comprising:
- a) a support substrate selected from the group consisting of polyethers, polystyrenes, siloxanes, polyacrylates, and combinations thereof;
b) a tertiary amine selected from the consisting of 1,8 Diazabicyclo-[5.4.0]-undec-7-ene (DBU);
1, 3, 4, 6, 7, 8-Hexahydro-2H-pyrimido [1,2,-a]pyrimidine (TBD), and N-(2-Hydroxyethyl)piperazine immobilized within the pores of the substrate; and
c) molar ratio of amine to acid anhydride captured is 1;
1.
3 Assignments
0 Petitions
Accused Products
Abstract
Two new classes of amine-based sorbents are disclosed. The first class comprises new polymer-immobilized tertiary amine sorbents; the second class new polymer-bound amine sorbents. Both classes are tailored to facilitate removal of acid anhydrides, especially carbon dioxide (CO2), from effluent gases. The amines adsorb acid anhydrides in a 1:1 molar ratio. Both classes of amine sorbents adsorb in the temperature range from about 20° C. upwards to 90° C. and can be regenerated by heating upwards to 100° C.
-
Citations
17 Claims
-
1. A sorbent for acid anhydrides comprising:
-
a) a support substrate selected from the group consisting of polyethers, polystyrenes, siloxanes, polyacrylates, and combinations thereof; b) a tertiary amine selected from the consisting of 1,8 Diazabicyclo-[5.4.0]-undec-7-ene (DBU);
1, 3, 4, 6, 7, 8-Hexahydro-2H-pyrimido [1,2,-a]pyrimidine (TBD), and N-(2-Hydroxyethyl)piperazine immobilized within the pores of the substrate; andc) molar ratio of amine to acid anhydride captured is 1;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 15, 16, 17)
-
-
8. A sorbent for removing acid anhydrides from a flue gas stream comprising:
-
a) a support substrate selected from the group consisting of polyethers, polystyrenes, siloxanes, polyacrylates, and combinations thereof; b) a tertiary amine selected from the consisting of acyclic imines, cyclic imines, acyclic amidines, cyclic amidines, acyclic guanidines, and cyclic guanidines immobilized within the pores; and
,c) the amine and acid anhydride reaction is in a 1;
1 ratio - View Dependent Claims (9, 10, 11, 12, 14)
-
Specification