Accession Number : AD0822336

Title :   PURIFICATION OF ORGANIC COMPOUNDS BY THERMAL DIFFUSION.

Descriptive Note : Final rept. 13 Aug 64-7 Aug 66,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OH

Personal Author(s) : Richardson, John L. ; Getz, Richard J. ; Britt, John C.

Report Date : OCT 1967

Pagination or Media Count : 108

Abstract : The primary objective of this investigation is to provide experimental data and theoretical developments which will assist in the understanding and exploitation of thermal diffusion as a liquid phase separation technique. This program has encompassed six major phases: (1) investigation of the effect of packing permeability on the steady state separations obtained in a homogeneously packed, batch-operated, thermogravitational column, (2) investigation of the effect of a polar solvent species on the separation of a binary nonpolar system, (3) investigation of the effect of feed flow rate on continuous-operated packed column performance, (4) investigation of means for predicting the occurrence of the 'forgotten effect' (reversed or altered separations resulting from the significant dependence of the density and/or the Soret Coefficient on concentration), (5) investigation of the effect of the physicochemical properties of a binary system on the variation of the steady state separation with packing permeability for the case of a binary liquid system undergoing separation in a homogeneously packed, batch-operated, thermogravitational column, and (6) investigation of the steady state separation characteristics of a nonhomogeneously packed, batch-operated, thermogravitational column. Thermal diffusion separation experiments were performed using tubular thermogravitational columns packed with glass beads and glass wool.

Descriptors :   *PURIFICATION), (*ORGANIC COMPOUNDS, (*THERMAL DIFFUSION, PURIFICATION), SEPARATION, LIQUIDS, THERMOGRAVIMETRIC ANALYSIS, MOLECULAR ISOMERISM, MIXTURES, INFRARED SPECTRA, RELAXATION TIME, SOLVENTS, FLUID FLOW, GLASS, WOOLEN TEXTILES, PERMEABILITY, INSTRUMENTATION, PIPES.

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE