Cationic composite silicate filter aids
US11596921B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2016 |
| Grant date | Mar 7, 2023 |
| Priority date | — |
| Expiry date | Feb 22, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/3268
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cationic composite filter aid may include a silicate substrate, a silica precipitated on the silicate substrate, and a cationic surface modification of the precipitated silica. A method for making a cationic composite filter aid may include providing a silicate substrate, precipitating a silica onto the silicate substrate to form a composite filter aid, and cationically modifying the precipitated silica to form a cationic composite filter aid. A method for filtering a liquid may include providing a liquid for filtering and filtering the liquid through a cationically modified composite filter aid. The cationically modified composite filter aid may include a silicate substrate, a precipitated silica, and a cationic surface modification of the precipitated silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.