Continuous overbasing of petroleum sulfonate with water removal and methanol addition between reaction stages

摘要

A method and apparatus for the continuous overbasing of petroleum sulfonate providing in a process in which CO2 is contacted with a reaction mixture of neutral petroleum sulfonate, lube oil stock, lime, methanol, and naphtha in a series of reaction vessels in which additional CO2 is contacted seriatim in each succeeding reaction vessel with the effluent from the preceding reaction vessel, a method and apparatus for the removal of at least a portion of the effluent from each reaction vessel with the reduction of water content in this portion and subsequent supplementing of methanol content in this portion to provide a reaction efficient amount of water and methanol in each succeeding reaction.