TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Processes: The pre-treatment comprises adding palm oil into deoiling tank, adding hot water (18-22 wt.%) of 90-95 degrees C, continuously stirring, standing, depositing to dissolve impurity mixture in grease in water, layering mixture, discharging impurity mixture arranged in lower layer from bottom of tank, and removing moisture in raw material to obtain standard raw material oil; mixing grease with acid value of less than 1 KOH mg/g with carbinol in reactor, adding solid alkali catalyst to form mixed material, with weight ratio of standard raw material oil, carbinol and catalyst at 100:25:1-3, heating mixed raw material via heater, controlling reacting temperature at 68-72 degrees C, refluxing carbinol via condenser, continuously stirring mixture via stirrer, reacting for 1-2 hours, adding sulfonated polyacrylamide (0.1-0.3 wt.%), depositing and layering reacted mixture into solid phase, glycerol phase and crude diesel oil, separating mixture via a centrifuge, with glycerol phase processed glycerol refining treatment, and crude diesel oil transmitted to crude diesel oil intermediate tank; and flowing crude diesel oil from crude diesel oil intermediate tank to crude diesel oil water washing tower, completely washing crude diesel oil via hot water for removing dissolved glycerol, drying via film evaporator, adding carclazyte (3-5 wt.%), stirring and discoloring for 0.5-1 hour at 75-85 degrees C, filtering to obtain product with color in Y5-6 of standard color solution, and transmitting product into product tank. The production of sulfonated polyacrylamide comprises adding 8-10% acrylic amide water solution, crosslinking agent N,N-methylene bisacrylamide (2-5%) into reactor, heating at 64 degrees C, adding initiator potassium persulfate (2-5%), adding nitrogen (N2) during reaction process, reacting for 1-2 hours, discharging material, drying at 110 degrees C until constant weight for dehydration, and obtaining crosslinked polypropylene; and adding crosslinked polypropylene, sodium hydrogensulfite (2-5%), formaldehyde water solution (37-40%), initiator (2-5%) and crosslinking agent (2-5%) into reactor, at ratio of acrylic amide, sodium hydrogensulfite and formaldehyde of 1:2:2, adjusting pH to 12 via 20% of sodium hydroxide solution, heating at 50 degrees C, reacting for 5-6 hours, discharging material, drying at 110 degrees C until constant weight for dehydration, and obtaining sulfonated polyacrylamide. Preferred Components: The water absorbing rate of sulfonated polyacrylamide is 790-850 g/g. The solid alkali catalyst comprises potassium oxide/aluminum oxide, cesium oxide/aluminum oxide or potassium nitrate/zirconium oxide. The content of methyl ester is detected via gas chromatography.