Method of treatment of waste water containing sulfur compounds
US4154673A · kind A · utility
3Cited by
8References
7Claims
0Family size
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Inventors
Key dates
| Filing date | Jun 28, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Jun 28, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Waste water issued from a wet type desulfurization apparatus and containing thionic acid ions is introduced into ion-exchange towers filled with weak-basic anion-exchange which has to effect anion exchange therein. The weak-basic anion-exchange resin which has adsorbed the thionic acid ions is desorbed by contacting an alkaline solution. The thionic acid ions included in the desorbing solution are decomposed by heating them in the presence of acid. A decomposed solution is issued out of the system after its neutralization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.