TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Processes: Industrial pure water is used in magnetic resonance excitation.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compositions: Mass ratio industrial pure water:methanol and/or ethanol is 1:0.5-2, mass ratio methanol and/or ethanol:oleic acid is 1:0.5-3, preferably 1:0.5-2, and biodiesel oil does not contain industrial pure water. Modified additive contains 20-50 pts. wt. pH buffering agent, 5-20 pts. wt. ethylhexyl nitrate, 0.5-5 pts. wt. antioxidant, and 10-40 pts. wt. organic solvent, and 0-40 pts. wt. function modifier, pH buffering agent contains 10-40 pts. wt. sodium petroleum sulfonate, 10-40 pts. wt. barium petroleum sulfonate, and 20-50 pts. wt. compound mixture, antioxidant is amine antioxidant, phenolic antioxidant, phenolic amine antioxidant, sulfur-phosphorus antioxidant corrosion inhibitor, dialkyl dithiocarbamate, benzene triazole compound, and/or thiadiazole compound, organic solvent is aromatic hydrocarbon solvent, ketone solvent, ester solvent, ether solvent, and/or petroleum product-based oil solvent, and petroleum product-based oil solvent contains paraffin oil and diesel oil. Function modifier contains 0-15 pts. wt. tritolyl phosphate, 0-5 pts. wt. co-emulsifying agent, and 0-30 pts. wt. isobutanol. Preferred Processes: Clear biodiesel is obtained by adjusting ratio of oleic acid and surfactant. Mixing is performed by rotary mixing, periodicity mixing, random shear mixing, and/or external magnetic resonance excitation mixing at room temperature having reaction pressure of less than or equal to 25 MPa. Preferred Parameters: Sodium petroleum sulfonate or barium petroleum sulfonate has acidity of less than or equal to 7 mg potassium hydroxide (KOH)/100 ml.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Surfactant is Span series emulsifying agent (RTM: Sorbitan), Tween series emulsifying agent (RTM: Polysorbate), sodium alkyl sulfonate, diethanolamine, triethanolamine, monoethanolamine, dimethylformamide, sodium carboxymethylcellulose, and/or polyvinyl alcohol.