Perforated Plate Columns for Analytical Batch Distillations

Oldershaw, C

doi:10.1021/i560092a026

Cited by 26 publications

(8 citation statements)

References 6 publications

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“…Table 12 shows the values of liquid viscosity, relative volatility, and surface tension, at pressure values of 2 and 20 kPa and the corresponding boiling temperatures, for an equimolar mixture of CP/CH. Table 12 gives us the inference that by operating a labscale glass distillation column, such as an Oldershaw column, 49 from 2 to 20 kPa, liquid viscosities from 1 to 5 mPa•s can be achieved with CP/CH at the corresponding boiling temperatures, accounting for a reasonable pressure drop over the height of the column.…”

Section: Resultsmentioning

confidence: 99%

A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor–Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol

et al. 2019

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Most of the distillation efficiency correlations that have been published thus far were developed or validated based on efficiency data at liquid viscosities less than 1 mPa•s. However, distillation with liquid viscosities greater than 1 mPa•s is encountered, in certain cases, in the chemical process industry. To study the effect of liquid viscosity on distillation efficiency at greater than 1 mPa•s, standardized test systems with elevated liquid viscosities at typical distillation conditions are required. To meet this objective, a new test system, cyclopentanol/ cyclohexanol, was chosen on the basis of a comprehensive set of search criteria. For this test system, vapor−liquid equilibrium data were collected from 2 to 101.3 kPa and modeled with the nonrandom two-liquid (NRTL) model. In addition, liquid viscosity data were measured from 303.15 to 373.15 K and modeled with the modified forms of the Andrade equations, in order to precisely represent the nonlinear dependence of liquid viscosity with temperature and composition. This test system will help study the effect of liquid viscosity on distillation efficiency from 1 to 5 mPa•s. Subsequent investigations on the effect of liquid viscosity on separation efficiency of distillation columns with trays are enabled.

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Section: Resultsmentioning

confidence: 99%

A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor–Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol

et al. 2019

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“…Oldershaw columns [57] are used in laboratories, sometimes on benches, to study new distillation separations. An Oldershaw column having a diameter of 75 mm and tray spacings of 75 mm would be considered large.…”

Section: Other Traysmentioning

confidence: 99%

Distillation Trays

Resetarits

2014

Distillation

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“…diameter, 30 in. long) with a 61% plate efficiency when operated on total reflux (11,12). This column was mounted between a two neck 22 liter glass still pot and a 14 in.…”

Section: Fractional Distillationmentioning

confidence: 99%

Fractional vacuum distillation of herring oil methyl esters

Ackman¹,

Ke²,

Jangaard³

1973

J Americ Oil Chem Soc

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Methyl esters of a Canadian Atlantic herring oil containing 62% monoethylenic fatty acids were subjected to batch fractional distillation under vacuum on a pilot plant scale, to study the feasibility of fractionating fatty acid esters of marine oils of low iodine value into monounsaturated fractions with increased commercial value for industrial chemical uses. A total of 64 methyl ester fractions were collected and analyzed by gas liquid chromatography. Recoveries of the major saturated and monounsaturated acids were close to 100%, and some fractions contained over 90% of the desired 22:1 long chain monounsaturated acids. The short chain polyunsaturated acids were recovered in good yields, but the long chain highly unsaturated acids were recovered in yields of 60% or less due to oxidative and thermal decomposition in the particular apparatus employed. If small amounts of unsaturated acids are acceptable, fractional distillation of low iodine value marine oils could inexpensively supply fractions with high concentrations of methyl esters of longer chain (C2o and C22) monounsaturated and shorter chain (C14)saturated acid or (C16) saturated-monounsaturated acid mixture. > ~q 5 Z © ~0 © en aBranched chain fatty acids are specified by: TMTD = 4,8,12-trimethyltridecanoic acid; pristanic acid = 2,6,10,14-tetramethylpentadecanoic acid; 7-MHD = "7-methylhexadecanoic acid; phytanic acid = 3,7,11,15-tetramethylhexadecanoic acid.bUnknowns I are three peaks between 19:0 and 20:0; unknown II is a single peak between 20:0 and 22:0; unknowns Ili are three peaks between 22:0 and 24:0.

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Perforated Plate Columns for Analytical Batch Distillations

Abstract: A N A L Y T I C A L E D I T I O N 265described. Only small volumes are required and relatively large samples (about 0.20 gram of alkaloid) are readily extracted.

Cited by 26 publications

References 6 publications

A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor–Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol

A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor–Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol

Distillation Trays

Fractional vacuum distillation of herring oil methyl esters

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