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259 条记录 (耗时 0.014 秒)

    82.
    发明专利
    失效

    公开(公告)号：JP2003524699A

    公开(公告)日：2003-08-19

    申请号：JP2000509881

    申请日：1997-10-06

    IPC分类号： C22B3/00 ,  B22F9/24 ,  B22F9/26 ,  B22F9/30 ,  C01B13/18 ,  C01G19/02 ,  C01G23/053 ,  C01G53/04 ,  C22B3/22 ,  C22B3/26 ,  C23C16/44 ,  C23C16/448

    摘要： 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.

    METHOD FOR RECOVERING VANADIUM
    85.
    发明专利
    METHOD FOR RECOVERING VANADIUM 失效

    公开(公告)号：JPS632810A

    公开(公告)日：1988-01-07

    申请号：JP14479286

    申请日：1986-06-23

    申请人： SHINKO CHEM

    发明人： NISHIDA KAZUHIKO ,  ARAGAKI HIROSHI ,  UCHIOKI MAKOTO ,  NAKAMOTO ISAO ,  KUROKI MASATO

    IPC分类号： C01G31/00 ,  C22B3/00 ,  C22B3/22 ,  C22B3/44 ,  C22B34/22 ,  C22B34/32

    摘要： PURPOSE:To recover V in high yield by adding an NH4 salt to the leachate of a roasted substance contg. Si, Cr, and V, controlling the pH in two steps, then cooling and agitating the leachate, and separating and colleclting the deposited vanadate crystal in high separation efficiency. CONSTITUTION:The leachate obtained by the leaching of a roasted substance contg. Si, Cr, and V or of blast furnace slag contg. the above-mentioned elements is used as a starting material. A mineral acid (e.g., sulfuric acid) is firstly added to the material to control the pH to 5.0-6.0, and 1.0-2.0mol of an NH4 salt (e.g., NH4Cl), based on the V dissolved in the leachate, is added. Alkaline water (e.g., aq. ammonia) and/or a mineral acid are used for controlling the pH to 5.0-5.2 during or after the addition of the NH4 salt, cooling and agitation are then carried out for about 1hr to deposit sodium ammonium vanadate as a crystal, and the crystal is separated from the remaining soln. contg. impurities and recovered.

    METHOD FOR REMOVING FLUORINE IN WET TREATING OF WORTHY METAL
    88.
    发明专利
    METHOD FOR REMOVING FLUORINE IN WET TREATING OF WORTHY METAL 失效

    公开(公告)号：JPS60228627A

    公开(公告)日：1985-11-13

    申请号：JP8187984

    申请日：1984-04-25

    申请人： MITSUI MINING & SMELTING CO

    发明人： KUBO HIROMI ,  SEKIYA TETSUO ,  WATANABE KOUSUKE

    IPC分类号： C22B3/22 ,  C22B3/00 ,  C22B3/04 ,  C22B3/44 ,  C22B19/00 ,  C22B19/20

    摘要： PURPOSE:To coprecipitate F in Zn extracting liquid together with hydroxides of Al and Fe to remove F, and to manufacture an electrolyte for Zn electrolysis, by extracting Zn by adding iron scraps and Al scraps, etc., then adding a neutralizer and oxidizer thereto in Zn extraction from materials containing Zn by sulfuric acid. CONSTITUTION:Zn ore and Zn scraps are treated by sulfuric acid or tail liquid at pure Zn electrolysis to dissolve and extract Zn. In this case, iron scraps, etc. are fed to set the ionic concn. of two valencies Fe in the extracting liquid to 0.5-2g/l. Further, Al scraps, etc. are added to control the ionic concn. of tervalent Al in the extracting liquid to 100-1,000mg/l. If Zn extraction is finished, a neutralizer such as CaO is added to control the pH to 4-6, and during said control, an oxidizer such as KMnO4 is added to oxidize bivalent Fe ion to tervalent Fe, Fe and Al are ppt.ed and removed as hydroxides. In this time, F in the extracting liquid is also coprecipitated and removed simultaneously. The corrosion of cathode plate by F in electrodeposition of pure Zn at a cathode is eliminated by using Zn extracting liquid contg. no F in electrolysis.

    OPERATION OF CRYSTALLIZER
    89.
    发明专利
    OPERATION OF CRYSTALLIZER 失效

    公开(公告)号：JPS60206402A

    公开(公告)日：1985-10-18

    申请号：JP6243384

    申请日：1984-03-30

    申请人： KAWASAKI STEEL CO ,  SHINGIJUTSU KAIHATSU JIGYODAN

    发明人： UCHINO KAZUHIRO ,  WATANABE TOSHIO ,  NAKAZATO YOSHIO ,  HOSHINO MINORU

    IPC分类号： C01G49/00 ,  B01D9/02 ,  C22B3/00 ,  C22B3/22 ,  C22B3/44

    摘要： PURPOSE:To fatilitate the long-term continuous operation of a crystallizer by stabilizing a crystallization condition, in operating the crystallizer, by imparting a concn. and temp. condition suitable for each liquid phase. CONSTITUTION:When an org. solvent S extracting and containing a Fe ion is guided to a mixing tank 13 through a temp. controller 11 and a release solution D comprising NH4HF2 is guided to said mixing tank 13 through a heater 12, an iron/fluorine complex is formed by iron release reaction and deposited as a crystal if the release reaction is succeedingly performed. Subsequently, the release solution containing the crystal reaches a crystal growing or cooling zone 17 to promote the growth of the crystal. Further, the release solution is discharged from a discharge port 21 through a crystal separation zone 20 and the crystal is discharged from a crystal discharge pipe 22. In operating this apparatus, the concn. of the release solution discharged from the apparatus is held to 85-115g/ las NH4HF2, the temp. of the org. solvent supplied to the apparatus to 20- 25 deg.C, the liquid temp., when the org. solvent and the release solution are mixed, to 40 deg.C or less and the temp. of the release solution in the above mentioned zone 17 to 15-20 deg.C.

    TREATMENT OF CONCENTRATE OF RARE EARTH METAL
    90.
    发明专利
    TREATMENT OF CONCENTRATE OF RARE EARTH METAL 失效

    公开(公告)号：JPS586947A

    公开(公告)日：1983-01-14

    申请号：JP10480081

    申请日：1981-07-03

    申请人： INOUE JAPAX RES

    发明人： INOUE KIYOSHI

    IPC分类号： B01J19/12 ,  C01F17/00 ,  C22B3/22 ,  C22B4/00 ,  C22B9/00 ,  C22B9/22 ,  C22B59/00 ,  H05B6/02 ,  H05B6/64 ,  H05B6/80

    摘要： PURPOSE:To refine rare earth metals contained in a powdered concentrate by reduction in high yields while saving energy and resources by kneading the concentrate with an electrolytic soln., heating the kneaded material in a treating vessel with electric power induced by high frequency electric power, and causing electric discharge. CONSTITUTION:A concentrate contg. rare earth metals such as a powdered concentrate mixture of monazite or xenotime with bastnaesite is kneaded with an aqueous soln. of an acidic or alkaline electrolyte, and the kneaded material 2 is put in a tightly sealed treating vessel 1. A high frequency current having 300MHz-300GHz microwaves is supplied from a power source 4a to a coil 4, and the material 2 is heated with the induced current. Water in the material 2 is evaporated, and the induced current is interrupted to locally cause spark discharge, and rare earth metals in the concentrate react with the electrolyte to decompose and reduce the rare earth metallic compounds. When an alkaline substance including NaOH is used as the electrolyte, the material 2 can be heated to a high temp. such as about 1,000 deg.C to accelerate the decomposition and reduction.