Method of preparing loosely aggregated 200-500 millimicron silica
US4049781A · kind A · utility
17Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1975 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Sep 10, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/152
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A loosely aggregated 200-500 millimicron primary particle size silica can be produced by a silicate neutralization technique. The process consists of neutralizing an alkali metal silicate solution by addition to an ammoniated acetic acid or carbonic acid mixture. These particles are loosely aggregated to an average particle size of about 1 micron. These particles are readily deaggregated in a fluid energy mill. A very convenient technique is to dry and deaggregate in a fluid energy mill in a single step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.