METAL REMOVAL AGENT

WIPO Patent Application WO/2021/145292

A1

An object is to provide a metal removal agent used when removing Mg from an aluminum alloy melt whose raw material is scrap or the like. The present invention provides a metal removal agent used for formation of a molten salt layer that takes in Mg from an aluminum alloy melt. The metal removal agent contains: a specific metal element that is one or more of Cu, Zn, or Mn; a specific halogen element that is one or more of Cl or Br; and Mg. The metal removal agent may also contain: a base halide that serves as a base material of the molten salt layer; and a specific metal halide that is a compound of a specific metal element and a specific halogen element. The specific metal element is one or more of Cu, Zn, or Mn, and the specific halogen element is one or more of Cl or Br. When the molten salt layer formed using the metal removal agent and the aluminum alloy melt containing Mg are brought into contact with each other, Mg is taken into the molten salt layer side from the aluminum alloy melt side and efficiently removed.

YAOKAWA JUN (JP)
MINOURA TAKUMA (JP)
HIBI KAZUMA (JP)
KAWAHARA HIROSHI (JP)
IWATA YASUSHI (JP)
ISHII HIROYUKI (JP)
KANO AKIRA (JP)
KUSAKA YUSEI (JP)
ITO KYOSUKE (JP)
MURATA TOMOO (JP)

PCT/JP2021/000593

July 22, 2021

January 11, 2021

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TOYOTA CHUO KENKYUSHO KK (JP)
TOYOTA TSUSHO CORP (JP)

B22D1/00; C22B9/10; C22B21/06

GB451271A	1935-06-21
US1975084A	1934-10-02
US5405427A	1995-04-11
US4097270A	1978-06-27
JP2007154268A	2007-06-21
JP2008050637A	2008-03-06
JP2011168830A	2011-09-01

JOURNAL OF JAPAN INSTITUTE OF LIGHT METALS, vol. 33, 1983, pages 243 - 248
JOURNAL OF JAPAN INSTITUTE OF LIGHT METALS, vol. 54, 2004, pages 75 - 81

MORIOKA Masayuki et al. (JP)

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