Process for heat stable salts removal from solvents

Patent metadata

Field	Value
Publication number	US-11020752-B2
Application number	US-201616339479-A
Country	US
Kind code	B2
Filing date	Oct 5, 2016
Priority date	Oct 5, 2016
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

An apparatus and a method for removing salts from a liquid are described. A first liquid containing at least one salt is mixed with magnetic composite particles. A subsequent separation of the particles from the liquid is achieved using an electromagnetic source.

First claim

The invention claimed is:

1. A method for removing heat-stable salts (HSS) from an aqueous solvent, the method comprising:
providing an aqueous solvent containing HSS;
feeding a plurality of magnetic composite particles coated with an alginate to the aqueous solvent and mixing the plurality of magnetic composite particles with the aqueous solvent;
separating the plurality of magnetic composite particles having at least a portion of the HSS adsorbed on the plurality of magnetic composite particles from the aqueous solvent using an electromagnetic source;
discharging a mixture of the plurality of magnetic composite particles with the aqueous solvent after mixing the plurality of magnetic composite particles with the aqueous solvent in a mixing tank ( 4 ) to an electromagnetic separator ( 5 ) where a separation takes place by which the plurality of magnetic composite particles having at least a portion of the HSS adsorbed on the plurality of magnetic composite particles are separated from the aqueous solvent by turning on and using an electromagnetic source ( 6 ) attached to the electromagnetic separator ( 5 );
collecting the aqueous solvent in a treated liquid tank ( 7 ) after the separation; and
turning off the electromagnetic source ( 6 ) and feeding a mixture of a regeneration liquid and the plurality of magnetic composite particles having at least a portion of the HSS adsorbed on the plurality of magnetic composite particles to a collecting tank ( 8 ).

2. The method according to claim 1 wherein the aqueous solvent is an aqueous amine solvent.

3. The method according to claim 2 wherein the aqueous amine solvent comprises at least one of methyldiethanolamine or alkanolamine.

4. The method according to claim 1 wherein the HSS is formed by one or more protonated amine cations and one or more anions selected from SCN″, HCOO″, CH 3 COO″, and CH 3 CH 2 COO − .

5. The method according to claim 1 wherein the plurality of magnetic composite particles comprise iron oxide magnetic particles.

6. The method according to claim 1 further comprising feeding the mixture in the collecting tank ( 8 ) back to the electromagnetic separator ( 5 ) and turning on the electromagnetic source ( 6 ) such that the plurality of magnetic composite particles are trapped in the electromagnetic separator ( 5 ).

7. The method according to claim 6 further comprising feeding the regeneration liquid from the electromagnetic separator ( 5 ) to the collecting tank ( 8 ), and further feeding the regeneration liquid from the collecting tank ( 8 ) to the tank ( 3 ).

8. The method according to claim 7 further comprising feeding additional aqueous solvent from a tank ( 2 ) via the mixing tank ( 4 ) to the electromagnetic separator ( 5 ), turning off the electromagnetic source ( 6 ) and feeding a mixture of the plurality of magnetic composite particles and the aqueous solvent to the mixing tank ( 4 ).

9. A method for removing salts from a liquid, the method comprising:
providing a first liquid containing at least one salt;
feeding a plurality of magnetic composite particles to the first liquid and mixing the plurality of magnetic composite particles with the first liquid;
separating the plurality of magnetic composite particles having at least a portion of the at least one salt adsorbed on the plurality of magnetic composite particles from the first liquid using an electromagnetic source;
collecting the first liquid in a treated liquid tank ( 7 ) after the separation;
feeding a second liquid as a regeneration liquid from a tank ( 3 ) to the mixing tank ( 4 ) and then to the electromagnetic separator ( 5 ); and
turning off the electromagnetic source ( 6 ) and feeding a mixture of the second liquid and the plurality of magnetic composite particles having at least a portion of the at least one salt adsorbed on the plurality of magnetic composite particles to a collecting tank ( 8 ).

10. The method according to claim 9 further comprising feeding the mixture in the collecting tank ( 8 ) back to the electromagnetic separator ( 5 ) and turning on the electromagnetic source ( 6 ) such that the plurality of magnetic composite particles are trapped in the electromagnetic separator ( 5 ).

11. The method according to claim 10 further comprising feeding the second liquid from the electromagnetic separator ( 5 ) to the collecting tank ( 8 ), and further feeding the second liquid from the collecting tank ( 8 ) to the tank ( 3 ).

12. The method according to claim 11 further comprising feeding additional first liquid from a tank ( 2 ) via the mixing tank ( 4 ) to the electromagnetic separator ( 5 ), turning off the electromagnetic source ( 6 ) and feeding a mixture of the plurality of magnetic composite particles and the first liquid to the mixing tank ( 4 ).

Assignees

• Univ Khalifa Science & Technology

Inventors

• Banat Fawzi Ahmed Ibraheem
• Alhseinat Emad Yousef Mahmoud
• Pal Priyabrata
• Achazhiyath Edathil Anjali

Classifications

• B01D2252/20489

  with two or more hydroxyl groups · CPC title

• C10G70/046

  by adsorption, i.e. with the use of solids · CPC title

• B01D43/00 Primary

  Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration (flotation processes B03D1/00; drying solid materials or objects F26B) · CPC title

• C10G2300/4081

  Recycling aspects · CPC title

• B01D53/1425 Primary

  Regeneration of liquid absorbents · CPC title