Calcination of calcium carbonate and blend therefor
US4828620A · kind A · utility
23Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Aug 27, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for calcination of a calcium carbonate material comprising heating the calcium carbonate material to a temperature and for a time sufficient to calcine the material to the degree desired while in the presence of a catalyst; said catalyst comprising at least one fused salt having the formula EQU MCO.sub.3.CaCO.sub.3.CaO.H.sub.2 O.sub.x, wherein M is an alkali metal and x is 0 to 1 and formed by fusing MCO.sub.3 and CaCO.sub.3 in a molar ratio of about 1:2 to 2:1, and a blend adapted to be heated to CaO comprising a calcium carbonate material and at least one such fused salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.