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Machine translation
1. (WO2007078016) CONTROL OF PARTICLE SIZE OF ARAGONITE PRECIPITATED CALCIUM CARBONATE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/078016    International Application No.:    PCT/KR2005/004688
Publication Date: 12.07.2007 International Filing Date: 31.12.2005
IPC:
C01F 11/18 (2006.01)
Applicants: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES [KR/KR]; 30 Gajeong-dong, Yuseong-gu, Daejeon-city 305-713 (KR) (For All Designated States Except US).
AHN, Ji-Whan [KR/KR]; (KR) (For US Only).
KIM, Jeong-Hwan [KR/KR]; (KR) (For US Only).
PARK, Hyun-Seo [KR/KR]; (KR) (For US Only)
Inventors: AHN, Ji-Whan; (KR).
KIM, Jeong-Hwan; (KR).
PARK, Hyun-Seo; (KR)
Agent: KWON, Oh-Sig; 4F, Jooeun Leaderstel 921, Dunsan-dong, Seo-gu, Daejeon-city 302-120 (KR)
Priority Data:
10-2005-0136061 30.12.2005 KR
Title (EN) CONTROL OF PARTICLE SIZE OF ARAGONITE PRECIPITATED CALCIUM CARBONATE
(FR) AJUSTEMENT DE LA DIMENSION DES PARTICULES DE CARBONATE DE CALCIUM PRECIPITE SOUS FORME D'ARAGONITE
Abstract: front page image
(EN)The present invention is related to a method of controlling particle sizes of aragonite-type precipitated calcium carbonate comprising the steps of manufacturing various-sized calcium hydroxide through the hydration reaction of CaO, which is caustic lime, while changing the solid-liquid ratio of caustic lime and the initial reaction temperature to 10 ˜ 80 °G stabilizing calcium hydroxide by adding the aqueous solution of sodium hydroxide to the suspension of calcium hydroxide; supplying the aqueous solution of sodium carbonate while stirring the suspension in the above stabilizing step; and washing, filtering, and drying the above suspension of calcium carbonate.
(FR)L'invention concerne un procédé d'ajustement des dimensions des particules de carbonate de calcium précipité de type aragonite, consistant à fabriquer de l'hydroxyde de calcium de diverses dimensions par réaction d'hydratation de CaO, c'est-à-dire la chaux vive, tout en changeant le rapport solide-liquide de la chaux vive et la température de réaction initiale à 10 ~ 80 °C; à stabiliser l'hydroxyde de calcium par addition de la solution aqueuse d'hydroxyde de calcium à la suspension d'hydroxyde de calcium; à utiliser la solution aqueuse de carbonate de sodium tout en agitant la suspension au cours de ladite étape de stabilisation; et à laver, filtrer, et sécher ladite suspension de carbonate de calcium.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, 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, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: Korean (KO)