分子蒸馏新技术在天然香料分离中的应用.pdf

·340 · CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2006 25 3 1 1 1 2 1 2 ( 525000 510500) GC MS 0.15 kPa 45 98.2%0.2 kPa 60 98.7% TQ 654.2 A 100066132006 Application of molecular distillation to the separation of natural perfumes 1 1 1 2 HUANG Min LIU Jiefeng ZHOU Rujin ZHONG Zhensheng 1 2 ( Department of Applied Chemistry Maoming College Maoming 525000College of Science South China University of Technolgy Guangzhou 510641) Abstract Such factors as distillation temperature and distillation pressure, etc. which affect the process of preparing citral from Litsea cubeba oil and of preparing cinnamaldehyde from cassia oil by molecular distillation were investigated under rotation of 370390 r/min,flow rate of 1drop/s,and temperature of cooling water 45 . The percentage composition of citral and cinnamaldehyde were determined by gas chromatography-mass spectrometry (GC-MS). The optimum conditions for obtaining distillate containing 98.2% citral and for obtaining distillate containing 98.7% cinnamaldehyde were distillation temperature 45 system pressure 0.15 Pa and distillation temperature 60 system pressure 0.2 kParespectively. Key words molecular distillation natural perfums cinnamaldehyde citral (molecular distillation) (short path distillation)