Method for preparation of hydrophobic precipitated silica
US6184408A · kind A · utility
22Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Apr 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for the preparation of hydrophobic precipitated silica. The method comprises contacting an aqueous suspension of a hydrophilic precipitated silica with (1) a catalytic amount of an acid and (2) an organosilicon compound in the presence of (3) a water-miscible organic solvent in an amount sufficient to facilitate reaction of the hydrophilic precipitated silica with the organosilicon compound to form a hydrophobic precipitated silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.