| 氧化锌-辛酸亚锡催化制备丙交酯的工艺研究 |
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| 引用本文： | 程超,贾晓凤,罗建成. 氧化锌-辛酸亚锡催化制备丙交酯的工艺研究[J]. 河南科学, 2010, 28(9): 1097-1099 |
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| 作者姓名： | 程超 贾晓凤 罗建成 |
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| 作者单位： | 南阳理工学院,生物与化学工程学院,河南,南阳,473004;南阳理工学院,生物与化学工程学院,河南,南阳,473004;南阳理工学院,生物与化学工程学院,河南,南阳,473004 |
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| 基金项目： | 南阳理工学院青年基金项目 |
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| 摘 要： | L-乳酸为原料,氧化锌和辛酸亚锡为催化剂,采用高真空蒸馏方法制备丙交酯.研究了一定真空度下,脱自由水温度和时间的关系,脱结合水温度和时间对丙交酯产率的影响.结果表明:真空度0.095 MPa,脱自由水95℃,脱结合水的温度120～125℃时,丙交酯蒸馏温度最低为170℃,最高为205℃,所得丙交酯粗产率在86%左右.经过反复试验认为,真空度0.095 MPa,水浴95～100℃脱自由水,操作简单,可保证乳酸不被蒸出.
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| 关 键 词： | 乳酸 丙交酯 温度 蒸馏 |
The Reseach on the Process of the Synthesis of Lactide |
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| Cheng Chao,Jia Xiaofeng,Luo Jiancheng. The Reseach on the Process of the Synthesis of Lactide[J]. Henan Science, 2010, 28(9): 1097-1099 |
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| Authors: | Cheng Chao Jia Xiaofeng Luo Jiancheng |
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| Affiliation: | (Department of Biology and Chemical Engineering,Nanyang Institute of Technology,Nanyang 473004,Henan China) |
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| Abstract: | With L-lactic acid as raw material and ZnO-Sn（Oct）2 as catalyst,the lactide was synthesized by the oligomerization and depolymerization under high vacuum.The results show that with the 0.095 MPa vacuum,the dehydration temperature was 95 ℃,the polymerization temperature was 120～125 ℃,The lowest temperature oflactide distil lation was 170 ℃ and the highest temperature was 205 ℃,The crude production rate of lactide stabilized at around 86 %. |
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| Keywords: | lactic acid lactide temperature combined |
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