Activated carbon

Patent metadata

Field	Value
Publication number	US-12258284-B2
Application number	US-201917253163-A
Country	US
Kind code	B2
Filing date	Jun 18, 2019
Priority date	Jun 19, 2018
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

There is provided an activated carbon having a high total trihalomethane filtration capacity, even in water treatment by passing water at a high superficial velocity (SV). In the activated carbon of the present invention, a pore volume A (cc/g) of pores with a size of 1.0 nm or less, of pore volumes calculated by the QSDFT method, is 0.300 cc/g or more, and elemental vanadium and/or a vanadium compound is contained.

First claim

The invention claimed is:

1. An activated carbon having:
a pore volume A (cc/g) of pores with a size of 1.0 nm or less wherein a pore volume calculated by the Quenched Solid Density Functional Theory (QSDFT) method is 0.300 cc/g or more,
a pore volume B (cc/g) of pores with a size of 1.5 nm or less wherein a pore volume calculated by the QSDFT method is 0.38 cc/g or more,
wherein the activated carbon has a specific surface area, as measured by BET method (single point using nitrogen as an adsorbate) of between 800 and 1,300 m 2 /g, and
wherein elemental vanadium and/or a vanadium compound is contained in the activated carbon.

2. The activated carbon according to claim 1 , wherein a proportion of the pore volume A relative to the pore volume B (pore volume A/pore volume B) is 0.75 to 1.00.

3. The activated carbon according to claim 1 , wherein the activated carbon has a total trihalomethane filtration capacity of 50 L/g or more.

4. The activated carbon according to claim 1 , wherein the activated carbon is a fibrous activated carbon.

5. The activated carbon according to claim 1 , which is for use as a water filter.

6. An activated carbon having:
a first pore volume (cc/g) of pores with a size of 1.0 nm or less wherein a pore volume calculated by the Quenched Solid Density Functional Theory (QSDFT) method is 0.300 cc/g or more,
a second pore volume of pores with a size of 2.0 nm or more wherein a pore volume calculated by the Quenched Solid Density Functional Theory (QSDFT) method is 0.02 cc/g or less,
wherein the activated carbon has a specific surface area, as measured by BET method (single point using nitrogen as an adsorbate) of between 800 and 1,300 m 2 /g, and
wherein elemental vanadium and/or a vanadium compound is contained in the activated carbon.

7. The activated carbon according to claim 6 , further comprising an expanded pore volume (cc/g) of pores with a size of 1.5 nm or less and wherein the pore volume calculated by the Quenched Solid Density Functional Theory (QSDFT) method for a cumulative volume (cc/g) of the first pore volume and the expanded pore volume is 0.38 cc/g or more.

8. The activated carbon according to claim 6 , wherein a proportion of the first pore volume relative to the second pore volume is 0.75 to 1.00.

9. The activated carbon according to claim 6 , wherein the activated carbon has a total trihalomethane filtration capacity of 50 L/g or more.

10. The activated carbon according to claim 6 , wherein the activated carbon is a fibrous activated carbon.

11. The activated carbon according to claim 6 , which is for use as a water filter.

12. The activated carbon according to claim 6 , which is for use as a water filter.

13. An activated carbon having:
a first pore volume (cc/g) of pores with a size of 1.0 nm or less, with pore volumes calculated by Quenched Solid Density Functional Theory (QSDFT) method, is 0.300 cc/g or more;
a second pore volume (cc/g) of pores with a size of 1.5 nm or more and 2.0 nm or less, with pore volumes calculated by the QSDFT method, is between 0.000 cc/g or more and 0.04 cc/g;
a third pore volume (cc/g) of pores with a size of 2.0 nm or more, with pore volumes calculated by the QSDFT method, is 0.02 cc/g or less; and
elemental vanadium and/or a vanadium compound.

14. The activated carbon according to claim 13 , wherein the first pore volume is 0.38 cc/g or more.

15. The activated carbon according to claim 13 , wherein a proportion of the first pore volume relative to the third pore volume is 0.75 to 1.00.

16. The activated carbon according to claim 13 , wherein the activated carbon has a total trihalomethane filtration capacity of 50 L/g or more.

17. The activated carbon according to claim 13 , wherein the activated carbon is a fibrous activated carbon.

Assignees

• Adall Co Ltd
• Unitika Ltd
• Osaka Gas Chemicals Co Ltd

Inventors

• Nakano Tomoyasu
• Shimizu Hirokazu
• Sakai Keiji

Classifications

• C02F2303/185

  The treatment agent being halogen or a halogenated compound · CPC title

• C02F2101/36

  containing halogen · CPC title

• B01J20/30

  Processes for preparing, regenerating, or reactivating · CPC title

• B01J20/20

  comprising free carbon; comprising carbon obtained by carbonising processes · CPC title

• C01B32/336

  characterised by gaseous activating agents · CPC title