苯乙烯型阳离子交换树脂催化废煎炸油的酯化反应  

Esterification of Waste Frying Oil Using Styrene Type Cation Exchange Resin Catalyst

作　　者：吕鹏梅[1] 刘莉梅[1,2] 杨玲梅[1] 袁振宏[1] 陈子博[3] 

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院大学,北京100049 [3]中南林业科技大学材料科学与工程学院,长沙410004

出　　处：《农业机械学报》2014年第11期201-205,193,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：'十二五'国家科技支撑计划资助项目(2014BAD02B07)

摘　　要：以液体石蜡、邻苯二甲酸二丁酯为混合致孔剂，采用悬浮聚合法制备多孔聚苯乙烯-二乙烯苯，磺化后得到磺酸型阳离子交换树脂。利用SEM／EDS、BET、IR等手段对其形貌、磺化程度进行表征，并通过酸值为63．0mg／g（以KOH计）煎炸油的酯化反应考察催化剂的活性。结果表明：磺酸根基团成功接到Ps分子链上；在聚合条件为360r／min、1．0％分散剂、1．0％引发剂、75℃保温4h、升温至85℃保温6h时，混合致孔剂的最佳添加量为40．0％液体石蜡、50．0％邻苯二甲酸二丁酯；在磺化条件为二氯乙烷1．0mL／g、硫酸5．0mL／g、70℃磺化1h后升温至80～85℃磺化3h时的最佳溶胀时间为lh、硫酸体积分数98％，得到阳离子交换树脂W2的最大交换容量为5．2mmol／g；在40．0％甲醇、10．0％W2、70％搅拌下酯化反应1．5h，W2的破碎率仅10．0％，FFA转化率达到86．8％，优于市售阳离子交换树脂PC101，且可重复使用5次。Porous polystyrene-divinylbenzene was prepared by suspension polymerization, and then sulfonie acid ion exchange resin was obtained by sulfonated porous polystyrene-divinylbenzene. The resin＇ s morphology and degree of sulfonation were characterized with SEM/EDS, BET, IR respectively. Esterification of waste frying oils with acid value of 63.0 mg/g was studied using cation exchange resin as catalyst to investigate its catalytic activity. 40.0% dosage of porogen was preferred when the polymerization conditions were 360 r/min, 1.0% dispersant, 1.0% initiator, 75℃ for 4 h and the heat to 85℃ for 6 h,while the sulfonation conditions were 1. 0 mL/g dichloroethane, 5.0 mL/g sulfuric acid, 70℃ sulfonated for 1 h and the heat to 80 -85℃ for 3 h, the optimum swelling time was 1 h, and the concentration of sulfuric acid was 98%. The maximum exchange capacity of the cation exchange resin W2 was 5.2 mmol/g in that condition. When the esterifieation was performed in the condition of 40.0% methanol, 10.0% W2, 70℃ stirring for 1.5 h, the crushing rate of W2 was only 10. 0% and the conversion rate of FFA reached to 86.8%. W2 is better than commercially available cation exchange resin PC101, and could be reused for 5 times.

关 键 词：煎炸油 酯化反应 阳离子交换树脂 催化活性 聚苯乙烯-二乙烯苯 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]