| http://www.w3.org/ns/prov#value | - In another embodiment, the surfactant is a nitrogen-containing phosphorus-free reaction product of a carboxylic acylating agent, preferably a succinic acylating agent, having at least one hydrocarbyl group from at least about 12, preferably from about 30, more preferably from about 35 to about 500, preferably to about 300 carbon atoms with at least one N-(hydroxyhydrocarbyl) amine.
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