Method of removing hydrocarbons from contaminated sludge

Details Method of removing hydrocarbons from contaminated sludge Method of removing hydrocarbons from contaminated sludge

1998-01-14

1999-10-19

Woo, Jay H.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210787, 210805, 210908, 210909, C02F 152

Patent

active

059683708

ABSTRACT:
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.

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