| abstract |
PROBLEM TO BE SOLVED: To provide an additive for reducing fouling and/or asphaltene agglomeration (or flocculation) in a middle-stream process and transportation of hydrocarbon oil, particularly crude oil and upstream transportation. SOLUTION: The fouling and/or asphaltene agglomeration (or flocculation) in the midstream process and transportation of hydrocarbon oils and upstream transportation is A metal detergent system comprising (A) a polyalkenyl-substituted carboxylic acid or anhydride, and (B) a hydrocarbyl-substituted hydroxybenzoate metal salt, or a hydrocarbyl-substituted sulfonate metal salt or a mixture of both salts or complexes thereof, (Where the (A) to (B) mass:mass ratio is in the range of 20:1 to 1:20 and the additive treatment ratio is in the range of 5 to 10,000 mass ppm). It is reduced by bringing the combination of agents to the oil. [Selection diagram] None |