Method for Producing Metal Titanium

Patent metadata

Field	Value
Publication number	US-2021310140-A1
Application number	US-201917267572-A
Country	US
Kind code	A1
Filing date	Jul 18, 2019
Priority date	Aug 31, 2018
Publication date	Oct 7, 2021
Grant date	—

Abstract

A method for producing metal titanium by carrying out electrolysis using an anode and a cathode in a molten salt bath, the method using an anode containing metal titanium as the anode, the method comprising a titanium deposition step of depositing metal titanium on the cathode, wherein, in the titanium deposition step, a temperature of the molten salt bath is from 250° C. or more and 600° C. or less, and an average current density of the cathode in a period from the start to 30 minutes later of the titanium deposition step is maintained in a range of 0.01 A/cm 2 to 0.09 A/cm 2 .

First claim

1 . A method for producing metal titanium by carrying out electrolysis using an anode and a cathode in a molten salt bath, the method using an anode containing metal titanium as the anode, the method comprising:
a titanium deposition step of depositing metal titanium on the cathode, wherein, in the titanium deposition step, a temperature of the molten salt bath is from 250° C. or more and 600° C. or less, and an average current density of the cathode in a period from the start to 30 minutes later of the titanium deposition step is maintained in a range of from 0.01 A/cm 2 to 0.09 A/cm 2 .

2 . The method according to claim 1 , wherein in the titanium deposition step, a surface area of a cathode immersed portion that is immersed in the molten salt bath is 3000 mm 2 or more.

3 . The method according to claim 1 , wherein a surface of the cathode on which metal titanium is deposited in the titanium deposition step has a curved surface shape.

4 . The method according to claim 3 , wherein the cathode has a cylindrical shape.

5 . The method according to claim 1 , wherein the molten salt bath contains at least two selected from the group consisting of MgCl 2 , NaCl, KCl, CaCl 2 , LiCl, alkali metal iodides, and alkali metal bromides.

6 . The method according to claim 1 , wherein the cathode contains 70% by mass or more of Ti, Mo, or Fe.

7 . The method according to claim 1 , further comprising an anode dissolving step of dissolving the anode by electrolysis in the molten salt bath prior to the titanium deposition step.

8 . The method according to claim 1 , further comprising a titanium separation step of separating the metal titanium deposited on the cathode from the cathode after the titanium deposition step.

9 . The method according to claim 1 , wherein the metal titanium is produced in the form of a sheet having a thickness of from 20 μm to 1000 μm.

Assignees

• Toho Titanium Co Ltd

Inventors

• Horikawa Matsuhide
• Suzuki Daisuke
• Yamamoto Haruka
• Fujii Hideki

Classifications

• C25C7/025 Primary

  used in cells for the electrolysis of melts · CPC title

• C25C7/08

  Separating of deposited metals from the cathode · CPC title

• C25C3/28 Primary

  of titanium · CPC title

• C22B34/12

  Obtaining titanium {or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08} · CPC title

• C25C7/06

  Operating or servicing · CPC title