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1. (WO2010026886) PROCESS FOR PRODUCTION OF CHROMIUM HYDROXIDE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/026886    International Application No.:    PCT/JP2009/064726
Publication Date: 11.03.2010 International Filing Date: 24.08.2009
IPC:
C01G 37/00 (2006.01), C25D 21/14 (2006.01)
Applicants: NIPPON CHEMICAL INDUSTRIAL CO., LTD. [JP/JP]; 11-1, Kameido 9-chome, Koto-ku, Tokyo 1368515 (JP) (For All Designated States Except US).
KUWANO Hiroyuki [JP/JP]; (JP) (For US Only).
BANDA Tomohiro [JP/JP]; (JP) (For US Only).
TANAKA Yasuyuki [JP/JP]; (JP) (For US Only)
Inventors: KUWANO Hiroyuki; (JP).
BANDA Tomohiro; (JP).
TANAKA Yasuyuki; (JP)
Common
Representative:
NIPPON CHEMICAL INDUSTRIAL CO., LTD. [JP/JP]; 11-1, Kameido 9-chome, Koto-ku, Tokyo 1368515 (JP)
Priority Data:
2008-228262 05.09.2008 JP
Title (EN) PROCESS FOR PRODUCTION OF CHROMIUM HYDROXIDE
(FR) PROCÉDÉ DE PRODUCTION D’HYDROXYDE DE CHROME
(JA) 水酸化クロムの製造方法
Abstract: front page image
(EN)A process for production of chromium hydroxide, whereby it is possible to form chromium hydroxide having a higher solubility in an aqueous acid solution than that of chromium hydroxide produced by a conventional process.  The process is characterized by adding both an aqueous solution of an inorganic alkali and an aqueous solution containing trivalent chromium simultaneously to an aqueous medium under the condition of reaction fluid temperature of 0 to lower than 50°C to form chromium hydroxide.  It is preferable that the pH of the reaction fluid is kept within the range of 7.0 to 12 during the addition of both aqueous solutions.
(FR)L’invention concerne un procédé de production d’hydroxyde de chrome permettant de former un hydroxyde de chrome à solubilité plus élevée dans une solution aqueuse acide que celui produit au moyen d’un procédé classique. Le procédé est caractérisé en ce qu’on ajoute simultanément une solution aqueuse d’alcali inorganique et une solution aqueuse de chrome trivalent à un milieu aqueux dans les conditions de température d’un fluide de réaction comprises entre 0 et moins 50°C pour former l’hydroxyde de chrome. Il est préférable de maintenir le pH du fluide de réaction dans la plage 7,0 à 12 pendant l’ajout des solutions aqueuses.
(JA) 本発明の水酸化クロムの製造方法は、従来の製造方法で得られた水酸化クロムよりも酸性水溶液に対する溶解性が高い水酸化クロムを得ることができ、その方法は、反応液温が0℃以上50℃未満の条件下で、無機アルカリ水溶液と三価のクロムを含む水溶液とを、水性媒体へ同時に添加して水酸化クロムを生成させることを特徴とする。三価のクロムを含む水溶液及び無機アルカリ水溶液を添加している間の反応液のpHを7.0~12の範囲に維持することが好ましい。
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)