# US 2021/0340685 A1 · Method for preparing a titanium-aluminum alloy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0340685 A1 - Document ID: US20210340685A1 - Status: Published application - Kind: A1 - Application number: 17/271,977 - Filed: 2019-08-29 - Published: 2021-11-04 - Earliest claimed: 2018-09-30 - Assignees: Chengdu Advanced Metal Material Industrial Technology Research Institute Co., Ltd. - Applicants: Chengdu Advanced Metal Material Industrial Technology Research Institute Co., Ltd. - Inventors: Fuxing ZHU; Shangrun MA - Web page: https://patentgrep.com/patent/US20210340685A1 ## CPC - C25C 3/36: Alloys obtained by cathodic reduction of all their ions - C22B 9/02: Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action {including acoustic waves; (C22B9/003, C22B9/006, C22B9/05, C22B9/22 take precedence)} - C22B 9/04: Refining by applying a vacuum - C22C 14/00: Alloys based on titanium - C25C 7/005: {of cells for the electrolysis of melts (C25C7/02 - C25C7/06 take precedence)} - C25C 7/025: {used in cells for the electrolysis of melts} - C25C 7/06: Operating or servicing - C22C 21/003: {containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium} - C25C 3/06: of aluminium - C25C 3/125: {based on carbon} - C25C 3/28: of titanium - Y02P 10/20: Recycling - C25C: PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR - C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS - C22C: ALLOYS (treatment of alloys C21D, C22F) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract The present invention belongs to the field of titanium metallurgy, and particularly relates to a method for preparing a titanium-aluminum alloy. The technical problem to be solved by the present invention is to provide a method for preparing a titanium-aluminum alloy, including the following steps: a. adding TiCl4 and AlCl3 to a molten electrolyte in a protective atmosphere, wherein the molten electrolyte is a mixture of at least one of alkali metal chloride or alkaline earth metal chloride and alkali metal fluoride; b. electrolyzing the mixture obtained in step a; and c. obtaining a titanium-aluminum alloy through vacuum distillation of a cathode product after electrolysis. The method of the present invention can shorten the preparation process of a titanium-aluminum alloy and reduce the manufacturing cost thereof, which is of great significance to the development of titanium alloy in practice. ## Claims ### Claim 1 A method for preparing a titanium-aluminum alloy, comprising the following steps: a. adding TiCl4 and AlCl3 to a molten electrolyte in a protective atmosphere, wherein the molten electrolyte is a mixture of at least one of an alkali metal chloride or an alkaline earth metal chloride and an alkali metal fluoride; b. electrolyzing the mixture obtained in step a; and c. obtaining a titanium-aluminum alloy through vacuum distillation of a cathode product after electrolysis. ### Claim 2 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein the alkali metal chloride is at least one of LiCl, NaCl, KCl, RbCl or CsCl, and the alkaline earth metal chloride is at least one of BeCl2, MgCl2, CaCl2, BaCl2 or SrCl2 in step a. ### Claim 3 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein at least one of the alkali metal chloride or the alkaline earth metal chloride is any one of NaCl—KCl, LiCl—KCl or CaCl2—NaCl in step a. ### Claim 4 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein the alkali metal fluoride is at least one of LiF, NaF, KF, RbF or CsF in step a. ### Claim 5 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein the alkali metal fluoride is NaF or KF in step a. ### Claim 6 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein an amount of the alkali metal fluoride added is 10-90 wt % of the electrolyte in step a. ### Claim 7 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein an amount of the alkali metal fluoride added is at least 6 times as much as a molar sum of Ti and Al in TiCl4 and AlCl3 in step a. ### Claim 8 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein the protective atmosphere is any one of argon, helium or neon in step a. ### Claim 9 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein the protective atmosphere is argon in step a. ### Claim 10 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein an anode of the electrolyte is graphite, and a cathode thereof is a conductive metal in step b. ### Claim 11 (depends on 10) The method for preparing a titanium-aluminum alloy according to claim 10, wherein the conductive metal is a material that is not alloyed with titanium or aluminum and has a melting point higher than that of the electrolyte in step b. ### Claim 12 (depends on 10) The method for preparing a titanium-aluminum alloy according to claim 10, wherein the conductive metal is titanium-aluminum alloy or carbon steel in step b. ### Claim 13 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein an electrolysis temperature is higher than a melting point of the electrolyte in step b. ### Claim 14 (depends on 13) The method for preparing a titanium-aluminum alloy according to claim 13, wherein the electrolysis temperature is 50-200° C. higher than the melting point of the electrolyte in step b. ### Claim 15 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein an electrolysis voltage is 3.1-3.2 V in step b. ### Claim 16 (depends on 1) The method for preparing a titanium-aluminum alloy according to claim 1, wherein a temperature of the vacuum distillation is higher than a melting point of a substance with a highest melting point in the electrolyte, a vacuum degree of the vacuum distillation is less than 0.1 Pa, and an end point of the vacuum distillation is continuously stable in vacuum for more than 5 h in step c.