Method for dissolution of metal
AssigneeAgency of Industrial Science & Technology, Ministry of International Trade & Industry
InventorsYukimichi Nakao, Kyoji Kaeriyama, Aizo Yamauchi
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Abstract
A metal is dissolved by a method which comprises establishing contact of the metal with a quaternary ammonium compound and a halogenated hydrocarbon or with a quaternary ammonium compound, a halogenated hydrocarbon, and a polar solvent.
Claims21
A method for the dissolution of a metal, which comprises establishing contact of said metal with a halogenated hydrocarbon and a quaternary ammonium compound represented by the following formula:
- ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently stand for one member selected from the group consisting of a hydrogen atom and a hydrocarbon group of not more than 2 carbon atoms, provided that at least one of the substituents in a hydrocarbon group, and X stands for a member selected from the group consisting of chlorine ion and bromine ion.
A method for the dissolution of a metal, which comprises establishing contact of said metal with a quaternary ammonium compound represented by the following formula:
- ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently stand for one member selected from the class consisting of a hydrogen atom and hydrocarbon groups of not more than seven carbon atoms, provided that at least one of the substituents is a hydrocarbon group, and X.sup.- stands for one member selected from the class consisting of chlorine ion and bromine ion, a halogenated hydrocarbon, and a polar solvent.
Dependencies are inferred from the claim text.