Aromatic substituted nonionic surfactants in soil prevention, reduction or removal in treatment zones
AssigneeEcolab Inc.
InventorsRobert D. P. Hei, Michael E. Besse
Life of this patent
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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.
Claims6
An aqueous peracid treatment composition, adapted for the removal of an odor composition from a gaseous stream, the treatment composition comprising, in an aqueous medium,
- an effective odor reducing amount of a peracid composition comprising hydrogen peroxide, peracetic acid and a carboxylic acid;
- about 0.1 to 25 weight percent of a sequestrant composition;
- an effective amount of an odor reducing essential oil;
- and
- about 1 to 40 weight percent of an effective soil removing amount of a surfactant composition selected from the group consisting of:
- benzyl-(PO)z-(EO)x-(PO)y-(EO)x-(PO)z-benzyl;
- alkylaryl-O-(EO)x-benzyl;
- and mixtures thereof;
- wherein x is 2–60;
- y is 0–15;
- and z is 0–15 and 1≦y+z≦40.
Dependencies are inferred from the claim text.