METHOD FOR PRODUCING INDIUM HYDROXIDE POWDER AND METHOD FOR PRODUCING INDIUM OXIDE POWDER, AND SPUTTERING TARGET

• Main Authors: KAMO TETSUO, FUJIMORI MANA, IWASA TAKESHI, SUGAMOTO NORIAKI, SHIOTANI TAIGA, MIZUNUMA SHOHEI, KAWAKAMI TETSUSHI, YADA HISATAKA
• Format: Patent
• Language: English; Japanese
• Published: 29.01.2015
• Subjects: APPARATUS THEREFOR; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INORGANIC CHEMISTRY; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide a method by which indium hydroxide powder is recovered with good efficiency and with high recovery rate.SOLUTION: In a method for producing indium hydroxide powder, following steps are performed as 1) obtaining an electrolyte slurry containing indium hydroxide powder deposited by electrolysis, 2) separating electrolyte with a rotary filter to obtain an electrolyte slurry having a concentration of 40% or more and 47% or less, 3) adding cleaning fluid to this electrolyte slurry to carry out repulp cleaning, 4) removing a part of the cleaning fluid from the cleaned slurry of after-repulp cleaning with a rotary filter, and 5) when spray drying the cleaned slurry of after-cleaning fluid-removal in a spray drier, spray drying a cleaned slurry whose concentration is adjusted to 30% or more and 45% or less. 【課題】効率良く、且つ高い回収率で水酸化インジウム粉を回収する。【解決手段】電解により析出した水酸化インジウム粉を含む電解スラリーを得て、ロータリーフィルタで電解液を分離して濃度が４０％以上４７％以下の電解スラリーを得て、その電解スラリーに洗浄液を加えてリパルプ洗浄を行い、リパルプ洗浄後の洗浄スラリーから洗浄液の一部をロータリーフィルタで脱水し、洗浄液脱水後の洗浄スラリーをスプレードライヤにて噴霧乾燥する際に、濃度が３０％以上４５％以下に調整された洗浄スラリーを噴霧乾燥する。【選択図】なし