提取豆腐柴叶果胶的动力学研究  

Kinetics of Pectin Extraction from Premna microphylla Turcz.Leaves

作　　者：王存文[1,2] 徐汶[1,2] 王为国[1,2] 张俊峰[1,2] 吴元欣[1,2] 池汝安[1,2] 

机构地区：[1]武汉工程大学化工与制药学院 [2]湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430074

出　　处：《林产化学与工业》2008年第5期16-20,共5页Chemistry and Industry of Forest Products

基　　金：湖北省教育厅科学研究计划2001年重大项目(2001Z20005)

摘　　要：研究了酸解法从豆腐柴叶中提取果胶的动力学过程,建立了受溶解果胶分子降解影响的果胶提取动力学模型,并用数学方法确定了最大的得率和最佳的提取时间。模型可应用于描述在实验室条件下,60、70、80和90℃时用盐酸从豆腐柴叶中提取果胶的酸提取过程,确立了提取过程的速率常数,从60℃下的3.01×10-4s-1变化到90℃下的8.64×10-4s-1,应用该模型对豆腐柴叶果胶的提取得率进行了理论计算,获得了90℃下最佳提取时间(50.19 m in)时的最大得率(8.007%),模型计算结果与实验数据吻合较好。所提出的理论模型能充分描述在酸性条件下的果胶提取过程和预测果胶的最大得率、果胶降解量和最佳的提取时间。The kinetics of extracting,pectin from Premna microphyUa Turcz. leaves with acid-solution was studied. A kinetic model of pectin extraction is proposed taking account of impact of dissolved pectin molecule degradation. The maximum yield and optimal extraction time were determined using mathematical methods. It can be applied to describe extraction of pectin from P. microphylla leaves using hydrochloric acid at temperatures of 60,70,80 and 90 ℃ in laboratory. The rate constant of extraction was established to be varied from 3.01 × 10^-4 s^-1 at 60 ℃ to 8.64 × 10^-4 s^-1 at 90 ℃ ,while the maximum yield of 8. 007 % was obtained at 90 ℃ over a period of 50.19 min. The theoretical results predicted with kinetic model were in good agreement with experimental data from P. microphyUa leaves. The proposed theoretical model describes adequately the pectin extraction process in an acid medium, and provides an opportunity to predict the yield of pectin, the quantity of gradated pectin substances and the optimum duration of extraction.

关 键 词：豆腐柴叶 果胶 提取 动力学模型 

分 类 号：TQ351.0[化学工程]