Method for the alteration of siliceous materials from bayer process liquors
US5415782A · kind A · utility
30Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Nov 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F7/0606
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Siliceous materials produced by thermally treating spent Bayer process liquors are obtained in modified form when produced in the presence of polymeric quaternary ammonium compounds, polyamine polymers, copolymers of acrylic acid and acrylamide, and polyacrylamides. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.