Abstract:
The saturated vapor pressures of 4-amino-2,2,6,6-tetramethyl-4-piperidine and 2,2,6,6-tetramethyl-4-hydroxypiperidine were predicted by CSGC-PRV equation,and the Antoine equations for the two components were correlated.The activity coefficients of the components in the binary mixture of 4-amino-2,2,6,6-tetramethyl-4-piperidine and 2,2,6,6-tetramethyl-4-hydroxypiperidine were calculatedby COSMO-SAC method.The Vapor-Liquid Equilibrium(VLE) data of the binary system were obtained by bubble point calculation.Based on the calculation results,4-amino-2,2,6,6-tetramethyl-4-piperi-dine was purified by batch distillation from the binary mixture,and the purity of the obtained product was greater than 99.00%.
WU Tian,CUI Xian-bao,YIN Wei-chao,ZHANG Xiao-kai.Purification of 4-Amino-2,2,6,6-Tetramethyl-4-Piperidine by Distillation[J]. Chemcial Industry and Engineering, 2010,27(4): 294-298
JENSEN T,FREDENSLUND A,RASMUSSEN P.Pure-component vapor pressures using UNIFAC groupcontribution[J].Ind Eng Chem Fundam.1981,20:239-246
[3]
LI P,MA P,YI S,et al.A new corresponding-statesgroup-contribution method(CSGC)for estimating vaporpressures of pure compounds[J].Fluid Phase Equilib-ria.1994,101:101-119
[4]
马沛生.化工数据[M].北京:中国石化出版社,2003
[5]
KLAMT A.Conductor-like screening model for real sol-vents:A new approach to the quantitative calculation ofsolvation phenomena[J].J Phys Chem,1995,99(7):2 224-2 235