(WO/1996/026901) PRODUCTION OF PRECIPITATED CALCIUM CARBONATE
- Biblio. Data
- Description
- Claims
- National Phase
- Notices
- Documents
| Latest bibliographic data on file with the International Bureau
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| IPC: | C01F 11/18 (2006.01) | ||||||||||||||||||
| Applicants: | AECI LIMITED [ZA/ZA]; Office Tower, 16th floor, Carlton Center, Commissioner Street, ZA-Johannesburg 2001 (ZA) (AL, AM, AT, AU, AZ, BB, BE, BF, BG, BJ, BR, BY, CA, CF, CG, CH, CI, CM, CN, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GN, GR, HU, IE, IS, IT, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MC, MD, MG, MK, ML, MN, MR, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SN, SZ, TD, TG, TJ, TM, TR, TT, UA, UG, UZ, VN only). FOUCHE, Pierre, Marc [ZA/ZA]; (ZA) (US Only). RAMSAY, James [GB/ZA]; (ZA) (MW only). | ||||||||||||||||||
| Inventor: | FOUCHE, Pierre, Marc; (ZA). | ||||||||||||||||||
| Agent: | W.P. THOMPSON & CO.; Coopers Building, Church Street, Liverpool L1 3AB (GB). | ||||||||||||||||||
| Priority Data: |
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| Title: | PRODUCTION OF PRECIPITATED CALCIUM CARBONATE | ||||||||||||||||||
| Abstract: | A process for producing precipitated calcium carbonate having a particle size D¿50? of from 1 to 2 microns inclusive includes the steps of first contacting carbon dioxide gas with either ammonium hydroxide or with ammonia gas in the presence of water, to produce a solution of ammonium carbonate, and then contacting the solution of ammonium carbonate with a solution of calcium nitrate at a temperature below 58 °C and at a pH from 6.5 to 9.0 inclusive, optionally under pressure, to precipitate the calcium carbonate as a fine powder. | ||||||||||||||||||
| Designated States: |
AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN. African Regional Intellectual Property Org. (ARIPO) (KE, LS, SD, SZ, UG) Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM) European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE) African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG). | ||||||||||||||||||
| Publication Language: | English (EN) |
| Filing Language: | English (EN) |
