Method for flocculating and removing solids suspended in water
US4781839A · kind A · utility
17Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Oct 8, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Methods are described for flocculating and removing solids suspended in water using an inorganic component containing iron, aluminum, or a mixture thereof in combination with a tannin-based flocculant produced by reacting a condensed tannin with an amino compound and an aldehyde. The tannin-based flocculant is preferably the product of a controlled reaction in which the viscosity is monitored as an indication of suitable shelf life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.