Preparation of alumina extrudates
US3983197A · kind A · utility
16Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1973 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Sep 24, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of preparing alumina extrudate particles. Finely divided alumina is admixed with from about 2 to about 10 wt. % alumina hydrosol and sufficient water added thereto to produce a dough extrudable at less than about 150 psig. The mixture is then extruded, dried and calcined. The alumina hydrosol functions as a source of alumina as well as a binder and/or lubricant, and obviates the need of extraneous binders or lubricants. The method is particularly useful to produce extruded particles of low average bulk density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.