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1. WO2020117810 - A PROCESS FOR PRODUCING CLEAN COAL USING CHEMICAL PRE-TREATMENT AND HIGH SHEAR REACTOR

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A method for producing clean coal comprising:

a. grinding coal particles into a dust-like consistency, having a diameter between about 20 pm and 80 pm;

b. mixing the ground coal particles with at least one extractant/solvent to produce a coal slurry;

c. introducing at least one activation agent, wherein the at least one activation agent selectively removes at least one impurity from the coal slurry;

d. introducing the coal slurry into a high shear reactor, wherein the high shear reactor promotes collision of the ground coal particles and the at least one activation agent; and

e. introducing a non-polar organic solvent to extract the coal slurry from the at least one impurity,

wherein extraction of the coal slurry from the at least one impurity yields a processed clean coal.

2. The method according to claim 1 , wherein the high shear reactor is selected from a group consisting of a spinning disk reactor, a cavitation reactor, and a combination thereof.

3. The method according to claim 1, wherein the activation agent is selected from a group consisting of performic acid, nitric acid, hydrogen peroxide, sodium hydroxide, peracetic acid, formic acid, acetic acid, and any combination thereof.

4. The method according to claim 1 , wherein the high shear reactor operates in a

continuous or semi-continuous manner.

5. The method according to claim 1, wherein the high shear reactor is temperature

controlled.

6. The method according to claim 1 , wherein the high shear reactor operates at a

rotational speed between 5,000 RPMs and 20,000 RPMs.

7. The method according to claim 1, wherein the high shear reactor operates at a linear velocity of 50-180 ips.

8. The method according to claim 1, wherein the high shear reactor iurther comprises surface-to-surface gaps, having a stator gap spacing between 50 pm and 200 pm.

9. The method according to claim 1 , wherein the high shear reactor iurther comprises surface-to-surface gaps having a cylinder-in-cylinder wall stator gap spacing between 20 pm and 800 pm .

10. The method according to claim 1, wherein the high shear reactor and the at least one activation agent promotes liquid, aqueous, and organic phases within the coal slurry.

11. The method according to claim 10, wherein the coal slurry within the organic phase is separated from the aqueous phase and washed and dried.

12. The method according to claim 10, wherein further processing within the aqueous phase extracts at least one material.

13. The method according to claim 12, wherein the at least one material comprises at least one precious or semi-precious metal.

14. The method according to claim 12, wherein the at least one material comprises at least one of platinum, vanadium, and palladium.

15. The method according to claim 1, wherein the processed clean coal is in the form of a liquid, a dried fine solid, or a suspended slurry.

16. The method according to claim 15, wherein the processed clean coal is used as an energy source.

17. The method according to claim 1, wherein removal of the at least one impurity

comprises an alkali treatment.

18. The method according to claim 1, wherein the processed clean coal is configured and selected for use in whole or in part with a group consisting of boilers, generators, fuel cells, engines, solvents, cleaning agents, and any combination thereof.