Impregnation liquid and activated carbon cloth and method of forming the same

Patent metadata

Field	Value
Publication number	US-12358798-B2
Application number	US-202117547721-A
Country	US
Kind code	B2
Filing date	Dec 10, 2021
Priority date	Jul 27, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

An impregnation liquid is provided, which includes (A) phenolic resin, (B) diazonaphthoquinone-based compound or a derivative thereof, (C) ionic compound, and (D) organic solvent. The weight of (A) phenolic resin and the weight of (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:0.8 to 0.9:0.1, and the weight of (C) ionic compound and the total weight of (A) phenolic resin and (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:1 to 1.4:1. The impregnation liquid can be used to form an activated carbon layer to wrap and to be directly in contact with the surface of a mesh.

First claim

What is claimed is:

1. An impregnation liquid, comprising:
(A) phenolic resin;
(B) diazonaphthoquinone-based compound or a derivative thereof;
(C) ionic compound; and
(D) organic solvent,
wherein a weight of (A) phenolic resin and a weight of (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:0.8 to 0.9:0.1,
wherein a weight of (C) ionic compound and a total weight of (A) phenolic resin and (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:1 to 1.4:1, and
wherein (C) ionic compound is zinc chloride.

2. The impregnation liquid as claimed in claim 1 , wherein a total weight of (A) phenolic resin, (B) diazonaphthoquinone-based compound or a derivative thereof, and (C) ionic compound and a weight of (D) organic solvent have a ratio of 0.1:0.9 to 0.5:0.5.

3. The impregnation liquid as claimed in claim 1 , wherein (A) phenolic resin is thermoplastic phenolic resin.

4. The impregnation liquid as claimed in claim 1 , wherein (B) diazonaphthoquinone-based compound or a derivative thereof comprises diazonaphthoquinone-based compound, sulfonated diazonaphthoquinone compound, sulfonated indeno-enone compound, sulfonated indeno-carboxylic acid compound, or a combination thereof.

5. The impregnation liquid as claimed in claim 1 , wherein (D) organic solvent comprises propylene glycol methyl ether acetate, propylene glycol methyl ether, N-methylpyrrolidone, acetone, or butanone.

6. A method of forming activated carbon cloth, comprising:
putting a mesh into the impregnation liquid as claimed in claim 1 , and the impregnation liquid adheres onto a surface of the mesh;
removing (D) organic solvent of the impregnation liquid to remain a solid component; and
carbonizing the solid component to form an activated carbon layer to wrap and to be directly in contact with the surface of the mesh, thereby obtaining an activated carbon cloth.

7. The method as claimed in claim 6 , wherein the step of carbonizing is performed at a temperature of 250° C. to 400° C.

8. The method as claimed in claim 6 , further performing an acid washing step after the carbonizing step to remove (C) ionic compound from the activated carbon layer.

9. The method as claimed in claim 6 , wherein the mesh comprises glass fabric, ceramic fiber cloth, or metal fiber cloth.

Assignees

• Ind Tech Res Inst

Inventors

• Wu Ching-Mao
• Chang Te-Yi
• Lin Szu-Yin
• Huang Yao-Jheng

Classifications

• D06M15/71

  Cooling; Steaming or heating, e.g. in fluidised beds; with molten metals · CPC title

• C08J2361/06

  of aldehydes with phenols · CPC title

• D06M11/74

  with carbon or graphite; with carbides; with graphitic acids or their salts · CPC title

• D06M10/10

  Macromolecular compounds · CPC title

• D06M15/327

  of unsaturated alcohols or esters thereof · CPC title