Using semi-continuous emulsion polymerization,methyl methacrylate(MMA),butyl acrylate(BA)as the polymerization monomer,acrylic acid(AA)as the functional monomer,2-acrylamide-2-methyl-propanesulfonic acid(AMPS)as modifier,ammonium persulfate(APS)as initiator,sodium dodecyl sulfate(SDS)and alkylphenol ethoxylate(OP-10)as emulsifier,which synthesized an improved Liaohe oilfield heavy pure acrylic emulsion demulsifier for dehydration effect.The effects of emulsifier mass fraction,icross-linker mass fraction were studied,and characterized by infrared spectroscopy,gel permeation chromatogra-phy,laser particle size analyzer and UV spectrophotometer.The optimal synthesis conditions were obtained by experiment.When the mass fraction of emulsifier(accounting for total monomer mass)was 10%,mass frac-tion of initiator was 0.8%,and the mass fraction of the modifier was 0.8%,the oil content of the dewatered sewage was only 47.5 mg/L,which met the requirment of discharge standards for mine sewage.
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