Process for production of rhombic shaped precipitated calcium carbonate
US5332564A · kind A · utility
31Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing rhombic or barrel shaped precipitated calcium carbonate. Quicklime is slaked in an aqueous solution containing about 0.1% to about 2% by weight of a sugar, based upon the weight of the CaCO.sub.3 to be produced. Carbon dioxide is added to the slaked lime slurry at a preferred temperature of about 50.degree. F.-70.degree. F. until the pH drops from about 11-12 to about 7-8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.