球形多孔硅酸镁制备及其糖汁脱色应用  

Preparation of Spherical Porous Magnesium Silicate and Its Application in Decolorization of Sugar Juice

作　　者：程昊[1,2] 孙黎明 唐婷范 CHENG Hao;SUN Liming;TANG Tingfan(Guangxi Key Laboratory of Green Processing of Sugar Resources,Guangxi Liuzhou Luosifen Research Center of Engineering Technology,College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;Province and Ministry Co-sponsored Collaborative Innovation Center of Sugarcane and Sugar Industry,Nanning 530004,China)

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州螺蛳粉工程技术研究中心,广西糖资源绿色加工重点实验室,广西柳州545006 [2]蔗糖产业省部共建协同创新中心,广西南宁530004

出　　处：《食品工业科技》2021年第5期18-25,共8页Science and Technology of Food Industry

基　　金：广西自然科学基金重点项目(2019GXNSFDA245025);国家自然科学基金地区科学基金项目(31560466);广西高等学校高水平创新团队及卓越学者计划资助项目(桂教人[2014]7号);广西糖资源绿色加工重点实验室开放课题(GXTZY201701)。

摘　　要：目的:制备球形多孔硅酸镁,并用于糖汁脱色研究。方法:结合水热合成法和模板法,以氯化镁和硅胶球为前驱体制备多孔硅酸镁,并对其进行XRD、FTIR和SEM表征分析;然后以制备的硅酸镁为吸附剂,以脱色率为指标,考察了球形多孔硅酸镁用量、吸附温度、吸附时间及pH对甘蔗原糖溶液脱色性能的影响;最后考察了多孔硅酸镁对糖汁色素的吸附过程。结果:表征分析可知制备的多孔硅酸镁为球形多孔硅酸镁。糖汁脱色实验结果表明,在球形多孔硅酸镁用量为0.10 g、吸附温度为30℃、吸附时间为40 min、pH为6.0时,其对糖汁的脱色率为69.8%。经拟合得知,球形多孔硅酸镁对糖汁色素的吸附过程符合准二级动力学吸附方程与Langmuir等温吸附方程。结论:本研究可为发展镁法制糖技术及工艺提供新的方法与理论依据。Objective:To study the preparation of spherical porous magnesium silicate and its application in decolorization of sugar juice.Methods:The porous magnesium silicate was prepared by hydrothermal synthesis method and template method with magnesium chloride and silica gel as precursors.XRD,FTIR and SEM were used to characterize the porous magnesium silicates.The effects of spherical porous magnesium silicate,adsorption temperature,adsorption time and pH value on decolorization performance of raw sugar solution were investigated by using spherical porous magnesium silicate as sorbent,taking raw sugar solution as research object and decolorization rate index.The adsorption process of porous magnesium silicate on sugar pigment was investigated.Results:The characterization results showed the spherical porous magnesium silicates was obtained.The results of decoloration showed that when the dosage was 0.10 g,the adsorption temperature was 30℃,the adsorption time was 40 min,and the pH value was 6.0,the decoloring rate of the juice was 69.8%.Under the experiment conditions the adsorption of sugar cane juice on spherical porous magnesium silicate follows quasi-secondary kinetic equation and Langmuir isothermal adsorption equation.Conclusions:The results can provide new methods and theoretical basis for the development of the sugar production technology and process use magnesium.

关 键 词：多孔硅酸镁 糖汁 脱色 甘蔗原糖 吸附动力学 

分 类 号：TS244.2[轻工技术与工程—制糖工程]