| Oil residue is the leavings from the production of fatty acid by hydrolysis and distillation of vegetable oil. At present, it is mainly used in the production of releasing agent, waterproofing asphalt, feeding and so on. All of these haven't achieved the full use of oil residue. This paper focused on using degumming, deacidification, decoloration technology to change some of its qualities and making it a useable component of additive for the production of alumina.First, the degumming agent SPAM was synthesized by NH4S2O8 and NaHSO3 as initiator. The synthetic conditions of SPAM were researched systematically. The optimal synthetic conditions were as follows:pre-gelatinizing temperature:80℃, pre-gelatinizing water:8%, NH4S2O8/NaHSO3:0.070%, grafting Temperature:60℃, solvent dosage:50.0mL/g, HLB value 8.5. The structure of SPAM was characterized by IR.Second, oil residue was purified by degumming, deacidification and decoloration. The optimal conditions for degumming:SPAM dosage:0.03%, temperature:50℃. The viscosity of oil residue can be reduced from 772.5mm2/s to 370.0mm2/s. Deacidification rate can reach 84.7% with NH3-H2O as the neutralizing agent and ethanol as demulsifier under the temperature of 80℃and whisking velocity of 150r/min. The decoloration based on actived floridin, actived carbon, H2O2 was studied. Through orthogonal experiment best condiction was found:mass fraction of actived floridin:8%, mass fraction of actived carbon:3.5%, mass fraction of H2O2:1.2%, temperature for the H2O2 racting with oil residue:5℃, time for the actived floridin adsorption:35min. Under this condition the best decoloration rate can reach 71.3%.Third, the purified oil residue was used in the substitution of alumina crystal additive. The primary aditive Hb and Hc can be replaced by the purified oil residue with the content of 20%(H2) and 15%(H3) respectively. The best adding time and quantity for H2 and H3 were 8h, 100mg/L and 15h,75mg/L respectively。...
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