Method for treating waste water containing nitrate ions
US6294097A · kind A · utility
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3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
There is disclosed a method for treating waste water containing nitrate ions by subjecting the waste water to decomposition and oxidation to eliminate a harmful gas, the method including the steps of: (a) mixing a waste water containing 10 to 90% by weight nitrate ions in terms of ammonium nitrate with a lower alcohol having 1 to 4 carbon atoms to prepare a mixture, (b) decomposing the mixture at a temperature of 250.degree. C. or higher to generate a decomposition gas, and (c) reacting the decomposition gas with a gas containing oxygen at a temperature of 250.degree. C. or higher to render the decomposition gas harmless.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.