Method and apparatus for separating one or more components from a composition

Patent metadata

Field	Value
Publication number	US-9833737-B2
Application number	US-201514873620-A
Country	US
Kind code	B2
Filing date	Oct 2, 2015
Priority date	Sep 26, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group. In some embodiments, during the contacting the feed composition can be contacted to a first side of a membrane while the absorbent fluid is contacted to a second side of the membrane. In some embodiments, the membrane can be a silicone membrane.

First claim

What is claimed is:

1. A method of separating one or more components from a feed composition, the method comprising:
contacting at least some of a first component of a feed composition comprising the first component with an absorbent fluid comprising an organosilicon fluid comprising an organopolysiloxane compound, wherein the organopolysiloxane compound comprises a trisiloxane, tetrasiloxane, or pentasiloxane comprising a polyether group, wherein the polyether group in the trisiloxane, tetrasiloxane, or pentasiloxane is terminated by hydroxyl, acetoxy, or alkoxy,
to provide a contacted composition and a used absorbent fluid comprising at least some of the first component contacted with the absorbent fluid.

2. The method of claim 1 , wherein the feed composition comprises a second component.

3. The method of claim 1 , wherein the contacting of the first component of the feed composition with the absorbent fluid comprises contacting a first side of a membrane with the feed composition while contacting a second side of the membrane with the absorbent fluid to produce a permeate mixture on the second side of the membrane comprising the used absorbent fluid and a retentate mixture on the first side of the membrane comprising the contacted composition.

4. The method of claim 1 , wherein the contacting of the first component of the feed composition with the absorbent fluid comprises contacting the feed composition with the absorbent fluid.

5. The method of claim 4 , wherein the contacting of the first component of the feed composition with the absorbent fluid comprises contacting in a packed bed column or tower, a trayed tower column or tower, a distillation column or tower, a liquid spray column or tower, a rotating desiccant wheel or tray, a falling film device, across a polymeric or inorganic membrane, or any combination thereof.

6. The method of claim 1 , further comprising regenerating at least part of the used absorbent fluid, comprising removing at least some of the first component from the used absorbent fluid to provide a regenerated absorbent fluid.

7. The method of claim 6 , further comprising using the regenerated absorbent fluid as at least a part of the absorbent fluid in the method.

8. The method of claim 1 , wherein the organosilicon compound comprises at least one silicon-bonded hydroxy group, at least one silicon-bonded ether, at least one silicon-bonded polyether, or a combination thereof.

9. The method of claim 1 , wherein the absorbent fluid further comprises an alcohol, a diol, a polyol, a solvent, a salt, or a combination thereof.

10. The method of claim 1 , wherein the first component comprises at least one of water, carbon dioxide, and oxygen.

11. The method of claim 1 , wherein the feed composition comprises nitrogen, natural gas, air, or any combination thereof.

12. A method of separating one or more components from a composition, the method comprising:
contacting a first side of a silicone membrane with a feed composition comprising a first component and a second component while contacting a second side of the membrane with an absorbent fluid, the absorbent fluid comprising an organosilicon fluid comprising an organopolysiloxane compound, wherein the organopolysiloxane compound comprises a trisiloxane, tetrasiloxane, or pentasiloxane comprising a polyether group, wherein the polyether group in the trisiloxane, tetrasiloxane, or pentasiloxane is terminated by hydroxyl, acetoxy, or alkoxy, to produce
a permeate mixture on the second side of the membrane comprising a used absorbent fluid comprising at least some of the first component and
a retentate mixture on the first side of the membrane comprising a contacted composition,
wherein the permeate mixture is enriched in the first component, and the retentate mixture is depleted in the first component.

13. The method of claim 12 , wherein the membrane comprises at least one of a supported membrane, an unsupported membrane, a dense membrane, a porous membrane, a tubular membrane, a flat sheet membrane, and a spiral wound membrane.

14. A system for separating one or more components from a feed composition, the system comprising:
a feed composition comprising a first component;
an absorbent fluid comprising an organosilicon fluid comprising an organopolysiloxane compound, wherein the organopolysiloxane compound comprises a trisiloxane, tetrasiloxane, or pentasiloxane comprising a polyether group, wherein the polyether group in the trisiloxane, tetrasiloxane, or pentasiloxane is terminated by hydroxyl, acetoxy, or alkoxy;

a contactor that contacts at least some of the first component with the absorbent fluid;
a contacted composition provided by the contactor; and
a used absorbent fluid provided by the contactor, the used absorbent fluid comprising at least some of the first component that the contactor contacted with the absorbent fluid.

Assignees

• Dow Corning

Inventors

• Ahn Dongchan
• Greiner Aaron J
• Hrabal James S
• Lichtor Alexandra N

Classifications

• B01D2256/245

  Methane · CPC title

• B01D53/228

  characterised by specific membranes · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D2325/027

  Nonporous membranes · CPC title

• B01D53/1493 Primary

  Selection of liquid materials for use as absorbents · CPC title