Oil recovery
AssigneeOTI Greentech Group AG
InventorJawahar Lal Wakhloo
Life of this patent
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Abstract
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.
Claims21
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.
A concentrate for manufacturing an aqueous cleaning solution for treating hydrocarbon-contaminated soil and for cleaning hydrocarbon-contaminated surfaces, wherein the concentrate is made by mixing together:
- (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.
6-7. (canceled)
A pre-solution for manufacturing an aqueous cleaning solution comprising a composition equivalent to that derived by mixing together 10% to 20% of a concentrate according to claim 1 and 80% to 90% of water.
An aqueous cleaning solution for treating hydrocarbon contaminated land or for cleaning hydrocarbon contaminated surfaces comprising water, 0.05-1.2% vol/vol of a first emulsifier, 0.05-1.2% vol/vol of a second emulsifier and 0.1-1.4% vol/vol of a vegetable oil.
An aqueous cleaning solution for treating hydrocarbon contaminated land or for cleaning hydrocarbon contaminated surfaces made by mixing together directly or indirectly water, 0.05-1.2% vol/vol of a first emulsifier comprising a non-ionic surfactant having an HLB value in the range 12 to 16, 0.05-1.2 vol % of a second emulsifier comprising a non-ionic surfactant having an HLB value in the range 6 to 12 and 0.1-1.4% vol/vol of a vegetable oil.
Dependencies are inferred from the claim text.