Separation of a 2-propanol/n-heptane mixture by liquid membrane perstraction

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00016a013· OSTI ID:6550310

Papadopoulos, T; Sirkar, K K ^[1]

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1. Stevens Inst. of Tech., Hoboken, NJ (United States)

The effectiveness of perstraction separation of a 2 vol% 2-propanol-n-heptane mixture using dodecane as the strip liquid was studied using a hollow fiber contained liquid membrane permeator (HFCLMP). The liquid membranes used were pure water and 3 wt% water in sulfolane. Both liquid membranes yielded similar mass-transfer coefficients and 2-propanol removal rates. Pure water, however, exhibited 3 times higher selectivity for 2-propanol than 3 wt % water in sulfolane. Selectivities of 2-propanol over n-heptane as high as 447 were experimentally obtained. The observed fluxes and selectivities at 25C are close to those obtained in prevaporation of a 10% 2-propanol-n-hexane mixture through cellulose ester films at 60C. A first-order mathematical model was developed using partition coefficients that are functions of solute concentrations, and it predicts the observed behavior of the two systems relatively well.

• OSTI ID: 6550310
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 32:4; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
HEPTANE
SEPARATION PROCESSES
PROPANOLS
SUPPORTED LIQUID MEMBRANES
MATHEMATICAL MODELS
ENERGY CONSERVATION
MEMBRANE TRANSPORT
ORGANIC SULFUR COMPOUNDS
PERFORMANCE
WATER
ALCOHOLS
ALKANES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MEMBRANES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
020400* - Petroleum- Processing