Aromatic substituted nonionic surfactants in soil prevention, reduction or removal in treatment zones
US7008913B2 · kind B2 · utility
23Cited by
48References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Oct 18, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3947
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a process for the treatment of a plant gaseous stream containing odor compounds including hydrogen sulfide, an alkyl mercaptan or an alkyl thiol and mixtures thereof by contacting the plant stream with an oxidizing agent that reduces the odor but forms elemental sulfur. The elemental sulfur, and other inorganic, scales that form, or deposit, can be suppressed or removed using a specific aromatic substituted nonionic surfactant material. The use of such a process produces a significant improvement in odor quality while maintaining a clean process facility and low operating pressure drop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.