▎ 摘　　要

NOVELTY - Preparation of magnetic oxide graphene demulsifying agent comprises adding ferromagnetic powder in mixed solution of ethanol and water, adding silane coupling agent, ultrasonically dispersing, adding graphene oxide powder into the solution, dispersing, continuously ultrasonically dispersing, extracting the magnetic material in the mixed solution by attracting with magnet, repeatedly washing the separated magnetic material with water and ethanol, vacuum drying, and obtaining the product. USE - Preparation of magnetic oxide graphene demulsifying agent used for water-oil emulsion to separate oil and water (claimed). ADVANTAGE - The method uses magnetic separation, which is efficient and time-saving, is energy-saving and environmentally friendly, uses easy to obtain raw materials, has low cost, and provides magnetic oxide graphene demulsifying agent, which has stable physical and chemical properties, can be used repeatedly, and avoids secondary pollution. DETAILED DESCRIPTION - Preparation of magnetic oxide graphene demulsifying agent comprises adding ferromagnetic powder having particle size of 20-150 mu m in mixed solution of ethanol and water, adding silane coupling agent, ultrasonically dispersing for 1-2 hours, adding graphene oxide powder into the solution, dispersing, where ratio of ferromagnetic powder, ethanol, water, silane coupling agent, and graphene oxide is 1-5 g:70-95 ml:5-30 ml:0.2-1 g:1-5 g, continuously ultrasonically dispersing for 2-4 hours, extracting the magnetic material in the mixed solution by attracting with magnet, repeatedly washing the separated magnetic material with water and ethanol, vacuum drying, and obtaining the product. An INDEPENDENT CLAIM is included for use of magnetic oxide graphene demulsifying agent by adding the magnetic oxide graphene demulsifying agent with deionized water to prepare suspension with concentration of 5-20 mg/ml, ultrasonically dispersing, adding in water-oil emulsion at 5-200 mg/L, mixing and stirring uniformly, standing, separating oil and water, and absorbing the magnetic material using a magnet.