Method for ammonia removal from waste streams
US6558643B2 · kind B2 · utility
7Cited by
23References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods for direct reduction of ammonia from waste streams by the steps of reacting an aqueous ammonia containing waste stream with a solution of a strong acid and a metal salt, wherein the cation in said metal salt of said solution is selected from the group consisting of Ag, Cd, Co, Cr, Cu, Hg, Ni, Pd, Zn; and wherein an ammonium-double salt is formed with said metal salt in an ammonia depleted waste stream; and treating said depleted waste stream to crystallize an ammonium-metal double salt therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.