Ion-Exchange Apparatus

Patent metadata

Field	Value
Publication number	US-2022371923-A1
Application number	US-202217866484-A
Country	US
Kind code	A1
Filing date	Jul 16, 2022
Priority date	Feb 18, 2020
Publication date	Nov 24, 2022
Grant date	—

Abstract

An inexpensive ion-exchange apparatus with an increased ion-exchange capacity has a raw-water tank (1), a treatment tank (2) and an ion exchanger (3). The raw-water tank (1) contains a to be treated liquid. The liquid contains impurity ions. The treatment tank (2) contains a treatment material that contains exchange ions exchangeable with the impurity ions. The ion exchanger (3) enables passage of the impurity ions from the raw-water tank (1) to the treatment tank (2) and the passage of the exchange ions from the treatment tank (2) to the raw-water tank (1). The treatment material in the treatment tank (2) has a higher molarity than the to be treated liquid in the raw-water tank 1.

First claim

What is claimed is:

1 . An ion-exchange apparatus comprising:
a raw-water section containing a to be treated liquid, the liquid including impurity ions; a treatment section containing a treatment material containing exchange ions exchangeable with the impurity ions; and an ion exchanger enabling passage of the impurity ions from the raw-water section to the treatment section and passage of the exchange ions from the treatment section to the raw-water section, wherein the treatment material in the treatment section has a higher molarity than the to be treated liquid in the raw-water section.

2 . The ion-exchange apparatus according to claim 1 , wherein the treatment material in the treatment section has a molarity of 2 mol/L or more.

3 . The ion-exchange apparatus according to claim 1 , wherein the raw-water section enabling flow of the to be treated liquid.

4 . The ion-exchange apparatus according to claim 3 , wherein the treatment section enabling the treatment material to flow in a direction opposite to the to be treated liquid.

5 . The ion-exchange apparatus according to claim 3 , further comprising an auxiliary treatment section packed with a granular ion exchanger, wherein the auxiliary treatment section is connected downstream of the raw-water section, and the to be treated liquid passed through the raw-water section flows into the auxiliary treatment section.

6 . The ion-exchange apparatus according claim 1 , wherein the raw-water section contains a packed ion exchanger in contact with the ion exchanger.

7 . The ion-exchange apparatus according to claim 6 , wherein the packed ion exchanger includes a spherical or fibrous ion exchanger.

8 . The ion-exchange apparatus according to claim 1 , wherein the treatment section includes a stirrer for stirring the treatment material.

9 . The ion-exchange apparatus according to claim 1 , wherein a seal seals at least one of a joint portion between the raw-water section and the ion exchanger and a joint portion between the treatment section and the ion exchanger.

10 . The ion-exchange apparatus according to claim 1 , wherein the exchange ions include group 1 element ions or hydroxide ions.

11 . The ion-exchange apparatus according to claim 1 , wherein the treatment material contains a weak acid or a weak base.

12 . The ion-exchange apparatus according claim 1 , wherein the treatment material is a solution containing group 1 element ions.

13 . The ion-exchange apparatus according to claim 1 , wherein the ion-exchange apparatus includes a first treatment section where the exchange ions include group 1 element ions, and
a second treatment section where the exchange ions are hydroxide ions, and wherein each of the first treatment section and the second treatment section is connected to the raw-water section with the ion exchanger therebetween.

14 . The ion-exchange apparatus according to claim 1 , wherein the treatment material contained in the treatment section includes a material having a molecular weight of 80 g/mol or more.

15 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger has a tubular shape, a flat-film shape, or a hollow-fiber shape.

16 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger includes an ion-exchange resin membrane.

17 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger includes a double-network gel.

18 . The ion-exchange apparatus according to claim 1 , wherein the ion exchanger is disposed on a support including a sheet-like fiber layer.

Assignees

• Fcc Kk

Inventors

• Endo Makiko
• Ino Kentaro
• Higuchi Hironori

Classifications

• B01D15/361 Primary

  Ion-exchange · CPC title

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title

• C02F1/42 Primary

  by ion-exchange (ion-exchange in general B01J) · CPC title

• C02F1/44

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title

• B01J47/12 Primary

  characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes (electrodialysis or electro-osmosis B01D61/42) · CPC title