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Purification of C22-tricarboxylic dibutyl-monomethyl ester by molecular distillation
  
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KeyWord:C22-tricarboxylic dibutyl-monome thyl ester  fatty acid methyl ester  molecular distil lation  purification
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Author NameAffiliation
LV Zongying  
ZENG Guifeng  
ZHOU Yongsheng,etc  
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Abstract:
      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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