Crude oil demulsifier and production technology thereof

The invention relates to demulsifier, in particular to high-performance demulsifier for oil field crude oil dehydrating processing and a preparing method of the high-performance demulsifier. The crude oil demulsifier comprises, by mass, 12% of octyl phenol resin, 20% of xylene, 0.3% of potassium hydroxide, 40.5% of epoxypropane, 27% of ethylene oxide and the balance glacial acetic acid. According to the crude oil demulsifier production technology, the high molecular weight octyl phenol resin is prepared, double bonds are introduced in the high molecular weight octyl phenol resin, the polymerization reaction is carried out on the molecular weight octyl phenol resin and the epoxy compound, and the target product-crude oil demulsifier including the double-bond compound is prepared. Compared with the prior art, the demulsification efficiency of the crude oil demulsifier is high. The cost of the crude oil demulsifier is low. According to the crude oil demulsifier, the nonyl phenol is replaced with octyl phenol, and the pollution to the water is reduced.