Composition and method for simultaneously precipitating metal ions from semiconductor wastewater and enhancing microfilter operation
US6258277A · kind A · utility
19Cited by
14References
10Claims
0Family size
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Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Aug 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The simultaneous precipitation of soluble heavy metal ions from semiconductor wastewater containing abrasive solids and enhancement of microfilter operation is achieved through the addition of an effective amount of a water-soluble polymer containing dithiocarbamate functionalities to the wastewater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.