LAUSR

Abstract To extend the application of the extracted oil from FCC slurry, the alkylated extract of FCC slurry was sulfonated by concentrated sulfuric acid to prepare petroleum sulfonate for oil displacement. The sulfonation processing parameters were optimized and the effects of the sulfonate products on enhancing oil recovery were investigated. Under the optimized conditions, the produced petroleum sulfonate (PS) had lower critical micelle concentration (CMC) value (0.2 wt%) and higher surface activity (the surface tension was 31.53 mN·m−1) than the commercialized surfactants. Furthermore, the petroleum sulfonate was mixed with additive, whose interfacial tension could be decreased to 0.0038 mN·m−1 (0.2 wt% PS + 0.1 wt% Na2CO3). The mixture solution also had good oil displacement effect, which could enhance the recovery by 25.1%. Therefore, this sulfonate protocol could effective extend the environmental friendly applications of extract of FCC slurry with good market application prospects.