Title:
【発明の名称】金属の解離方法または金属化合物の解離方法
Document Type and Number:
Japanese Patent JP2003524699
Kind Code:
A
Abstract:
A method for dissociating metal-ligand complexes in a supercritical fluid by treating the metal-ligand complex with heat and/or reducing or oxidizing agents is described. Once the metal-ligand complex is dissociated, the resulting metal and/or metal oxide form fine particles of substantially uniform size. In preferred embodiments, the solvent is supercritical carbon dioxide and the ligand is a beta -diketone such as hexafluoroacetylacetone or dibutyldiacetate. In other preferred embodiments, the metals in the metal-ligand complex are copper, silver, gold, tungsten, titanium, tantalum, tin, or mixtures thereof. In preferred embodiments, the reducing agent is hydrogen. The method provides an efficient process for dissociating metal-ligand complexes and produces easily-collected metal particles free from hydrocarbon solvent impurities. The ligand and the supercritical fluid can be regenerated to provide an economic, efficient process.
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Inventors:
Chen M Wai
Fred H Hunt
Hamburger Industriewerk Gesellschaft Mitt Beschlenktel Haftung
Lin Yuhe
Fred H Hunt
Hamburger Industriewerk Gesellschaft Mitt Beschlenktel Haftung
Lin Yuhe
Application Number:
JP2000509881A
Publication Date:
August 19, 2003
Filing Date:
October 06, 1997
Export Citation:
Assignee:
Idaho Research Foundation, Inc.
International Classes:
B22F9/24; C22B3/00; B22F9/26; B22F9/30; C01B13/18; C01G19/02; C01G23/053; C01G53/04; C22B3/22; C22B3/26; C23C16/44; C23C16/448; (IPC1-7): C22B3/00
Attorney, Agent or Firm:
Akihide Sugimura (2 outside)