| 摘要: |
| 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％。 |
| 关键词: 废弃油脂 固体碱 脱酸 脱色 |
| DOI：10.3969/j.issn.1673-5005.2016.05.022 |
| 分类号::TS 229 |
| 文献标识码:A |
| 基金项目:国家自然科学青年基金项目(21106187);山东省优秀中青年科学家奖励基金项目(BS2011NJ021);中央高校基本科研业务费专项(14CX02049A) |
|
| Influences of deacidification and decolorization of waste oil using supported solid base |
|
CHEN Shuang1, GUAN Yu1, GAO Wei2, LIU Hui 'e1, GAO Zhen1
|
|
(1.College of Chemical Engineering in China University of Petroleum, Qingdao 266580, China;2.SINOPEC Engineering Incorporation, Beijing 100101, China)
|
| Abstract: |
| Deacidification and decolorization are key processes of waste oil pretreatment. The solid base was made by immersion method, using activated carbon (AC) and activated bentonite (AB) as support, which was characterized by X-ray fluorescence, nitrogen adsorption. Influences of support ratio, concentration of impregnation solution, solid base amount, reaction 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％. |
| Key words: waste oil solid base deacidification decolorization |
