Alumina particles
US4952389A · kind A · utility
38Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/21
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Essentially spherical particles are disclosed of at least 98.5% alumina having a surface area less than about 1 m.sup.2 /g, an attrition resistance of less than about 0.3 weight percent/hour in an air jet attrition test, a particle size of about 30 to about 110 microns, a tap density of about 1.3 to about 1.9 g/cc, and sufficient porosity to hold catalytic metals in conventional catalytic amounts. The alumina particles are especially suited for use as fluid bed catalyst carriers for use in environments involving the presence of steam, particularly at high temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.