Methods of removing oil and metal ions from oily wastewater
US5256304A · kind A · utility
20Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods are disclosed for removing oil and metal ions from oily wastewaters. Polymeric tannin amine compounds are added to the oily wastewater to demulsify the oil, and flocculate the metal ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.