Aromatic substituted nonionic surfactants in soil prevention, reduction or removal in treatment zones
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.
1. 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.
2. The composition of claim 1 wherein the soil is elemental sulfur.
3. The composition of claim 2 wherein the aqueous treatment composition comprises about 0.1 to 50 weight percent of a peracetic acid composition.
4. The composition of claim 1 wherein the composition is adapted for removal of an odor comprising a sulfur compound from a gaseous stream.
5. The composition of claim 1 wherein the aqueous treatment composition comprises about 1.0 to 20 weight percent of a peracetic acid composition and about 0.1 to 20 weight percent of the surfactant.
6. The composition of claim 5 wherein the aqueous treatment composition comprises about 0.1 to 10 weight percent of a sequestrant composition.