OIL RECOVERY

摘要

An aqueous cleaning solution for treating hydrocarbon-contaminated soil and for cleaning hydrocarbon-contaminated surfaces is provided. Suitably it is prepared by progressively diluting a concentrate comprising: i) 10-60% by volume of a first emulsifier; (ii) 10-60% by volume of a second emulsifier and (iii) 20-70% by volume of vegetable oil In a preferred embodiment the concentrate comprises a polyethylene glycol sorbitan trioleate, a polyoxyethylene sorbitan monopalmitate and corn oil with the two sorbitan molecules having different HLB-values.

主权项

1. A concentrate for manufacturing an aqueous cleaning solution for treating hydrocarbon-contaminated soil and/or for cleaning hydrocarbon-contaminated surfaces comprising:
(i) 10-60% by volume of a first emulsifier comprising a non-ionic surfactant having an HLB value in the range 12 to 16; (ii) 10-60% by volume of a second emulsifier comprising a non-ionic surfactant having an HLB value in the range 6 to 12; and (iii) 20-70% by volume of vegetable oil.