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| 酒石酸辅助尿素包合法分离异硬脂酸 |
| Separation of isostearic acid by tartaric acid-assisted urea adduction fractionation |
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| DOI： |
| 中文关键词: 异硬脂酸 酒石酸 尿素包合法 |
| 英文关键词:isostearic acid tartaric acid urea adduction fractionation |
| 基金项目: |
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| 中文摘要: |
| 采用酒石酸辅助尿素包合法分离异硬脂酸。由单因素实验优化工艺条件，并采用显微镜和X射线衍射仪对包合物进行分析。结果表明：最佳的工艺条件为酒石酸与尿素摩尔比1∶?6、尿素与混合脂肪酸质量比2∶?1、甲醇与混合脂肪酸质量比11.9∶?1、包合时间12 h、包合温度10?℃，在最佳工艺条件下，异硬脂酸的纯度为72.1%，得率为87.4%；酒石酸与尿素摩尔比为1∶?6时，固相包合物的外部形态完整，X射线衍射谱图中硬脂酸分子的特征峰强度最高，晶胞体积为1 849.9 3，键长为a=39.9 、b=4.9 、c=9.4 ，晶格参数与硬脂酸标准卡片值基本相同。通过控制酒石酸的加入量，可调控包合物的外部形貌和晶体结构，使异硬脂酸的纯度和得率发生改变。 |
| 英文摘要: |
| Isostearic acid was separated by tartaric acid-assisted urea adduction fractionation. The purification conditions were optimized by single factor experiment, and the inclusion complex was analyzed by microscope and X-ray diffractometer. The results showed that the optimal conditions were obtained as follows: molar ratio of tartaric acid to urea 1∶?6, mass ratio of urea to mixed fatty acid 2∶?1, mass ratio of methanol to mixed fatty acid 11.9∶?1, adduction fractionation time 12 h and adduction fractionation temperature 10?℃. Under these conditions, the purity of isostearic acid was 72.1%, and the yield was 874%. When the molar ratio of tartaric acid to urea was 1∶?6, the external morphology of solid was complete, the characteristic peak intensity of the stearic acid molecule was the highest, the unit cell volume was 1 849.9 3, the bond length was a=399 , b=4.9 , c=9.4 , and the lattice parameter corresponded to the stearic acid standard card. By controlling the dosage of tartaric acid, the external morphology and crystal structure of the inclusion complex could be regulated to change the purity and yield of the isostearic acid. |
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