Alumina spheroids with controlled small particle size and a process for producing them
US4392987A · kind A · utility
27Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Dec 30, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0072
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Small size alumina particles of controlled sizes suitable for use as a catalyst support can be made from an acidified alumina slurry by spraying under nonatomizing conditions from a nozzle with a gas or inert fluid used to disperse the slurry into small droplets. The droplets can either be sent through an ammoniated kerosene column or the acidified slurry can be spray dried. Small alumina spheroids are produced, which after calcination, have controlled size diameters from about 0.01 mm. to about 2.0 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.