弱酸型离子交换树脂脱胶行为的动力学与热力学研究  

Kinetics and thermodynamics of degumming of oil by ion exchange resin with weak acid

作　　者：赵万里[1] 韩洁[1] 杨晓康[1] 陈斌[1] 李蓉[1] 于秋硕[1] 马晓迅[1] 

机构地区：[1]西北大学化工学院,陕北能源先进化工利用技术教育部工程研究中心,陕西省洁净煤转化工程技术研究中心,西安710069

出　　处：《中国油脂》2012年第9期27-30,共4页China Oils and Fats

基　　金：陕西省科技攻关计划项目(2009K10-02);陕西省自然科学基金项目(2011JM2013);陕西省教育厅自然科学基金项目(09JK735&09JK758);西北大学科研启动基金项目(PR10028)

摘　　要：对弱酸型离子交换树脂的油脂脱胶进行了实验,并探讨了其吸附动力学和热力学行为,通过对比拟合不同温度下Langmuir和Freundlich方程,发现Freundlich方程可以较好地描述实验条件下树脂对磷脂的吸附行为,40℃下的方程为y=2.028 1x+0.391 4,回归系数R2=0.950 4,50℃下的方程为y=1.816 5x+0.405 4,回归系数R2=0.940 7,并推测出吸附过程中ΔH>0,ΔG>0,ΔS>0,表明实验条件下树脂脱胶是微量吸热的过程,磷脂在树脂上发生的是复杂的多层吸附。Degumming of oil by weak acid ion exchange resin was conducted and the thermodynamic and kinetic model of the resin were studied. The action of degumming by resin in the experiment condition could be better described by Freundlich equation after compared the relative standard deviation between the Langmuir and Freundlich at different temperture. The equations were y = 2. 028 lx ＋ 0. 391 4 （R2 = 0.950 4） and y = 1.816 5x ＋ O. 405 4 （ R2 = 0.940 7 ） at 40 ℃ and 50 ℃, respectively, and ZIH 〉 0 ,AG 〉 0 ,AS 〉0 were got for further study. The study indicated that the adsorption for phospholipid on the resin surface in degumming process was the multi - layer adsorption and the degumming was a micro - endo- thermal process.

关 键 词：脱胶 FREUNDLICH方程 弱酸型离子交换树脂 

分 类 号：TQ644.4[化学工程—精细化工]