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| 分子蒸馏提纯C22-三酸二丁一甲酯的研究 |
| Purification of C22-tricarboxylic dibutyl-monomethyl ester by molecular distillation |
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| DOI： |
| 中文关键词: C22-三酸二丁一甲酯 脂肪酸甲酯 分子蒸馏 提纯 |
| 英文关键词:C22-tricarboxylic dibutyl-monome thyl ester fatty acid methyl ester molecular distil lation purification |
| 基金项目: |
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| 中文摘要: |
| 采用刮膜式分子蒸馏装置对C22-三酸二丁一甲酯进行提纯，考察了1级分子蒸馏中，蒸馏温度、蒸馏压力、进料速率和刮膜转速对C22-三酸二丁一甲酯含量和收率的影响。得到1级分子蒸馏提纯C22-三酸二丁一甲酯的适宜分离工艺条件为：蒸馏温度120℃，蒸馏压力40 Pa, 进料速率1.2 g/min，刮膜转速240 r/min；在此条件下，C22-三酸二丁一甲酯的含量可达95.6%，收率为85.0%。在蒸馏压力较大情况下，采用多级分子蒸馏可提高产品C22-三酸二丁一甲酯含量，但收率下降，当蒸馏压力增大为80 Pa时，经4级分子蒸馏后，C22-三酸二丁一甲酯含量可达到96.5%，收率由1级分子蒸馏的93.9%下降至78.0%。提纯产物经红外光谱和质谱分析，确定产物为目标产物C22-三酸二丁一甲酯。 |
| 英文摘要: |
| C22-tricarboxylic dibutyl-monomethyl ester was purified by wiped film molecular distiller,and the effects of distillation temperature, distillation pressure, feeding rate, scraper speed on the content and yield of C22-tricarboxylic dibutyl-monomethyl ester in one-step molecular distillation were investigated. The optimal one-step molecular distillation conditions were obtained as follows: distillation temperature 120℃, distillation pressure 40 Pa，feeding rate 1.2 g/min,scraper speed 240 r/min. Under these optimal conditions, the content and yield of C22-tricarboxylic dibutyl-monomethyl ester were 95.6%and 85.0% respectively. The content of C22-tricarboxylic dibutyl-monomethyl ester increased while the yield decreased when C22-tricarboxylic dibutyl-monomethyl ester was purified by multi-step molecular distillation with a higher distillation pressure, |
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