Metal recovery method

Patent metadata

Field	Value
Publication number	US-2026009152-A1
Application number	US-202319134005-A
Country	US
Kind code	A1
Filing date	Nov 29, 2023
Priority date	Nov 30, 2022
Publication date	Jan 8, 2026
Grant date	—

Abstract

A metal recovery method includes: injecting a solution containing metal existing in an ionic state into a container where electrode plates are disposed; keeping the solution stationary relative to the electrode plates; passing a current between the electrode plates to form a sponge-like porous metal body on an electrode plate serving as a cathode; and separating the sponge-like porous metal body from the electrode. The deposited metal on the electrode does not adhere to the electrode plate, and thus can be recovered.

First claim

1 - 5 . (canceled)

6 . A metal recovery method comprising:
injecting a solution containing metal existing in an ionic state into a container where electrode plates are disposed; after the injecting of the solution into the container where the electrode plates are disposed, waiting for a certain time; passing a current between the electrode plates to form a sponge-like porous metal body on an electrode plate serving as a cathode; and separating the sponge-like porous metal body from the electrode plate serving as the cathode, wherein during the separating, causing bubbles to be brought into contact with the electrode plate or the sponge-like porous metal body.

7 . A metal recovery method comprising:
injecting a solution containing metal existing in an ionic state into a container where electrode plates are disposed; after the injecting of the solution into the container where the electrode plates are disposed, waiting for a certain time; passing a current between the electrode plates to form a sponge-like porous metal body on an electrode plate serving as a cathode; and separating the sponge-like porous metal body from the electrode plate serving as the cathode, wherein during the separating, vibrating the electrode plates.

8 . A metal recovery method comprising:
injecting a solution containing metal existing in an ionic state into a container where electrode plates are disposed; after the injecting of the solution into the container where the electrode plates are disposed, waiting for a certain time; passing a current between the electrode plates to form a sponge-like porous metal body on an electrode plate serving as a cathode; and separating the sponge-like porous metal body from the electrode plate serving as the cathode, wherein during the separating, reversing a polarity of the electrode plate.

9 . The metal recovery method according to claim 6 , wherein the waiting, the passing, and the separating are repeated until the metal ion concentration in the solution falls to or below a predetermined value.

10 . The metal recovery method according to claim 7 , wherein the waiting, the passing, and the separating are repeated until the metal ion concentration in the solution falls to or below a predetermined value.

11 . The metal recovery method according to claim 8 , wherein the waiting, the passing, and the separating are repeated until the metal ion concentration in the solution falls to or below a predetermined value.

12 . The metal recovery method according to claim 6 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

13 . The metal recovery method according to claim 7 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

14 . The metal recovery method according to claim 8 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

15 . The metal recovery method according to claim 9 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

16 . The metal recovery method according to claim 10 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

17 . The metal recovery method according to claim 11 , wherein a concentration of hydrogen peroxide in the solution is measured during the waiting, and if the concentration of hydrogen peroxide is less than or 15 equal to a predetermined threshold, performing a resupplying of hydrogen peroxide at least up to the threshold.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Minami Hirohumi
• Tsuiki Etsuji
• Shimizu Yasuo
• OOGA Satoshi
• Noma Shinjiro

Classifications

• C25D1/20

  Separation of the formed objects from the electrodes {with no destruction of said electrodes} · CPC title

• C25D1/06

  Wholly-metallic mirrors · CPC title

• C25C7/08

  Separating of deposited metals from the cathode · CPC title

• C25C7/02

  Electrodes (consumable anodes for the refining the metals C25C1/00 - C25C5/00); Connections thereof · CPC title

• C25C5/02 Primary

  from solutions · CPC title