The present application relates to oil and gas
field development and
environmental protection technical field, especially an aging oil demulsification treatment method, comprising: mixing
fly ash and
sodium hydroxide, then calcining, acid leaching, then mixing with oily
sludge and ferroferric
oxide, reduction reaction, mixing the reduction
reaction product with 3-mercaptopropyl
triethoxysilane, modification reaction, to obtain magnetic adsorbent; mixing aging oil, partial
phosphate and water, stirring, standing and separating, to obtain pretreated aging oil; adding magnetic adsorbent, complexing agent,
wetting reverse agent and
demulsifier to the pretreated aging oil, stirring, then
microwave irradiation treatment,
magnetic separation, vortex separation and centrifugal
dewatering, to obtain purified oil. The present application removes FeS particles by magnetic adsorbent, combines with multi-assistant component synergistic demulsification and multi-field
coupling physical separation, destroys the stable emulsification
system of aging oil, and the process is efficient, suitable for industrial demulsification treatment of high stability aging oil.