Deacidification and decolorization are key processes of waste oil pretreatment. The solid base was made by immer-sion method, using activated carbon ( AC) and activated bentonite ( AB) as support, which was characterized by X-ray fluo-rescence, nitrogen adsorption. Influences of support ratio, concentration of impregnation solution, solid base amount, reac-tion time and reaction temperature on removal of free acid and colored impurities were investigated. The results show that the optimum parameters of solid base preparation are that AC ∶ AB=6 ∶ 4 and the concentration of impregnating solution is 10 g/L. The optimum operating conditions of this one-step process are that the amount of solid base is 150 mg/g, the reaction time is 30 min and the reaction temperature is 70 ℃. Under these conditions, the decoloration rate of waste oil reaches 54. 77%and the deacidification rate is as high as 90. 91%.%脱酸与脱色处理是废弃油脂回收利用预处理工艺中的关键环节。采用浸渍法制备活性炭( AC )/活性白土( AB)复合型固体碱,借助X射线衍射、氮气吸附表征固体碱性能,并使用固体碱对废弃油脂进行脱酸脱色处理,考察载体配比、浸渍液浓度、固体碱用量、反应时间、反应温度对脱除游离酸和有色杂质的影响。结果表明：制备固体碱的最佳工艺参数为AC ∶ AB=6∶4,浸渍液浓度为10 g/L；脱酸-脱色处理时的最佳工艺参数为固体碱用量为150 mg/g,反应时间为30 min,反应温度为70℃；在该条件下,废弃油脂的脱色率为54.77%,脱酸率为90.91%。
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