Particulate ceramic useful as a proppant
US4944905A · kind A · utility
43Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1986 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Jan 21, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/267
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Process for making particulate ceramics having an alumina rich region near their surface, comprising the following steps: PA0 (a) mixing and pelletizing, with the aid of water, raw materials including a mineral particulate such as nepheline syenite and a binder such as bentonite; PA0 (b) drying the wet pellets from step (a); PA0 (c) mixing the dried pellets with alumina parting agent; and PA0 (d) firing the mixture of pellets and parting agent at a sufficient temperature (less than 1450.degree. C.) and for sufficient time for vitrification to occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.