Patent ID: 6849589

Claim:
A composition for removing hydrocarbon-containing soils comprising: a) a nonionic surfactant selected from the group consisting of a branched or linear primary alcohol ethoxylate, a secondary alcohol ethoxylate, a branched decyl/tridecyl alcohol ethoxylate, a branched or linear alkylphenol ethoxylate, a branched or linear alkyl amine ethoxylate, an alkyl ether amine ethoxylate, a branched or linear alcohol alkoxylate, alkyl glycosides, and a mixture thereof; b) a quaternary amine salt surfactant within the general formula (I) wherein R 1 and R 2 are the same or different and are selected from the group consisting of alkyl and substituted alkyl groups, R3 is selected from the group consisting of straight chain alkyls, branched chain alkyls, straight chain heteroalkyls, and branched chain heteroalkyls having from about 10 to 20 carbon atoms, R 4 is selected from the group consisting of alkyl groups having from 1 to about 5 carbon atoms, and X is a halogen atom; and a solvent system consisting essentially of: c) a slightly water-soluble polar organic compound; and d) water wherein the weight ratio of slightly water-soluble polar organic compound (c) to the total amount of nonionic surfactant and quaternary amine salt surfactant present (a+b) ranges from about 0.1:1 to about 0.27:1.