Page 135 - 精细化工2019年第9期

第 36 卷第 9 期 精 细 化 工 Vol.36, No.9
201 9 年 9 月 FINE CHEMICALS Sept. 2019

医药日化与原料
磷酸-硝酸镁复合清净剂对糖汁的清净及机理

李慰霞 1,2 ，李利军 1,2* ，杨岚风 1,2 ，毛 祥 1,2 ，程 昊 1,2

（1. 广西糖资源绿色加工重点实验室, 生物与化学工程学院，广西科技大学，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）

摘要：考察了硝酸镁和磷酸复合清净剂在高 pH 条件下对赤砂糖回溶糖浆的清净效果及机理。在单因素实验基
础上确定正交实验的因素与水平，采用正交实验对清净工艺进行了优化。获得最佳工艺条件为：复合清净剂（镁
离子质量分数 2.0%、磷酸质量分数 1.7%）加入量 2.0%（以糖汁体积为基准，下同），pH 11.0，聚丙烯酰胺（PAM）
水溶液（2.0 mg/L）用量 0.1%，温度 32 ℃。在此条件下脱色率为 88.2%，沉降时间为 69 s。对蔗糖体系和糖汁
体系的混凝物进行了 SEM、TEM、Zeta 电位分析、XRD 分析，结果发现，复合清净剂通过混凝反应生成的羟
基磷酸钙和氢氧化镁可对色素等非糖物质进行电中和吸附、包埋、网捕。
关键词：复合清净剂；混凝；脱色率；沉降时间；清净机理；医药与日化原料
中图分类号：TS244.2 文献标识码：A 文章编号：1003-5214 (2019) 09-1863-07

Decolorization and Mechanism of Phosphoric Acid-Magnesium

Nitrate Composite Detergent for Sugar Juice

1,2
1,2
1,2
1,2
LI Wei-xia , LI Li-jun 1,2* , YANG Lan-feng , MAO Xiang , CHENG Hao
（1. Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering,
Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, China; 2. Province and Ministry
Co-sponsored Collaborative Innovation Center of Sugarcane and Sugar Industry, Nanning 530004, Guangxi, China）
Abstract: The purification effect and mechanism of magnesium nitrate-phosphoric acid composite
detergent on the remelted syrup of brown granulated sugar were studied under the condition of high pH.
Orthogonal experiment was used to optimize the purification conditions and the element and level of the
orthogonal experiment were determined on the basis of single factor experiment. The optimum conditions
were obtained as follows: addition amount of composite detergent (mass fraction of magnesium ion and
phosphoric acid 2.0% and 1.70%, respectively) 2.0% (based on the volume of sugar juice, the same below),
pH value 11.0, dosage of polyacrylamide (PAM) aqueous solution (2 mg/L) 0.1%, temperature 32 ℃.
Under these conditions, the decolorization rate was 88.2% and the best sedimentation time was 69 s. SEM,
TEM, Zeta potential analyzer, and XRD were used to characterize the complexes in the sucrose system and
the brown granulated sugar remelted syrup system. It was found that the composite detergent could
electrically neutralize, adsorb, embed and trap the non-sugar substances such as pigments by the
coagulation reaction of hydroxyl calcium phosphate and magnesium hydroxide.
Key words: composite detergent; coagulation; decolorization rate; settling time; clarification mechanism;
drug and cosmetic materials

蔗汁清净是制糖工艺中的重要工序，其主要目 传统的脱色工艺有磷酸-亚硫酸法、碳酸法和石
[2]
的是除去色素分子和非糖组分，从而为煮糖工序提 灰法 等，中国糖厂普遍采用磷酸-亚硫酸法，通过
[1]
供优质的清汁 。 燃烧硫磺产生二氧化硫进行脱色，其利用率不高，

收稿日期：2018-09-19; 定用日期：2019-03-04; DOI: 10.13550/j.jxhg.20180702
基金项目：国家自然科学基金（31560466）
作者简介：李慰霞（1991—），男，硕士生。联系人：李利军（1966—），男，教授，博士生导师, E-mail:lilijun0562@sina.com。