초록 ▼

A composition and method of removing hydrocarbons from a contaminated sludge which comprises hydrocarbons, solid particles and water is disclosed. The method comprises the steps of providing a contaminated sludge including hydrocarbons and solid particles such that the hydrocarbons are bound to at l

A composition and method of removing hydrocarbons from a contaminated sludge which comprises hydrocarbons, solid particles and water is disclosed. The method comprises the steps of providing a contaminated sludge including hydrocarbons and solid particles such that the hydrocarbons are bound to at least some of the solid particles; applying a treatment fluid to the contaminated sludge, the treatment fluid comprising water, a silicate, a nonionic surfactant, an anionic surfactant, a phosphate builder and a caustic compound; contacting the contaminated sludge with the treatment fluid for a time sufficient to remove the hydrocarbons from at least some of the solid particles; separating the hydrocarbons from the treatment fluid and from the solid particles; recovering the hydrocarbons; and recycling the treatment fluid by applying the treatment fluid to additional contaminated sludge.

대표청구항 ▼

[ What is claimed is:] [1.] A method of removing hydrocarbons from a contaminated sludge which comprises hydrocarbons, solid particles and water, the method comprising the steps of:(a) providing a contaminated sludge including hydrocarbons and solid particles such that the hydrocarbons are bound to

[ What is claimed is:] [1.] A method of removing hydrocarbons from a contaminated sludge which comprises hydrocarbons, solid particles and water, the method comprising the steps of:(a) providing a contaminated sludge including hydrocarbons and solid particles such that the hydrocarbons are bound to at least some of the solid particles;(b) applying a treatment fluid to the contaminated sludge, the treatment fluid comprising water, a silicate, a nonionic surfactant, an anionic surfactant, a phosphate builder and a caustic compound;(c) contacting the contaminated sludge with the treatment fluid for a time sufficient to remove the hydrocarbons from at least some of the solid particles;(d) separating the hydrocarbons from the treatment fluid and from the solid particles;(e) recovering the hydrocarbons; and(f) recycling the treatment fluid by applying the treatment fluid to additional contaminated sludge.