On-line monitoring of the distillates of a solvent switch process by near-infrared spectroscopy

被引:8
作者
Ge, ZH
Buchanan, B
Timmermans, J
De Tora, D
Ellison, D
Wyvratt, J
机构
[1] Merck Res Labs, Analyt Res Dept, Rahway, NJ 07065 USA
[2] Sensors 2 Informat, Elkton, VA 22827 USA
[3] Merck Mfg Div, Regulatory & Analyt Sci Proc Analyt, W Point, PA 19486 USA
关键词
near-infrared spectroscopy; on-line process monitoring; alcohol; temperature variation;
D O I
10.1163/156856699750249404
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
An on-line fiber-optic near-infrared spectroscopic method has been developed for real-time monitoring of distillate composition as a reliable way of assessing the degree of a solvent switch process from methanol and n-propanol to isopropyl acetate. Multivariate statistical methods of Multiple Linear Regression and Partial Least Squares were evaluated for quantitative determination of the total alcohol concentrations in the distillate samples. Robust models were obtained by incorporating temperature variance into the calibration set. Reliable prediction of total alcohol concentration was successfully achieved by near-infrared spectroscopy as judged by a comparison with gas chromatography data.
引用
收藏
页码:277 / 287
页数:11
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