Process and apparatus for oxidizing and neutralizing caustic waste to liquid fertilizer
US5607653A · kind A · utility
1Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Mar 17, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2251/104
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for treating and detoxifying salts-hydroxides scrubber wastes containing nitrite salts or sulfite salts so that the final product has low nitrite or sulfite content, a neutral pH and is usable either as a base blend or as a stand-alone liquid product for agricultural applications. One approach is to have a continuous flow oxidation of the waste solution by ozone followed by a neutralization step with MKP. Another approach is to perform oxidation and neutralization in one step by the addition of hydrogen peroxide and MKP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.