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Class of Equipment Advantages Disadvantages Mixer-settlers Good contacting Large holdup High power costs High investment Large floor space Interstage pumping may be required Handles wide flow ratio Low headroom High efficiency Many stages available Reliable scale-up Continuous, counterflow Low initial cost Limited throughput with small density difference Cannot handle high flow ratio High headroom Sometimes low efficiency Difficult scale-up Low operating cost Simplest construction contactors (no mechanical drive) Good dispersion Reasonable cost Continuous, counterflow contactors (mechanical agitation) Limited throughput with small density difference Cannot handle emulsifying Many stages possible Relatively easy scale-up systems Cannot handle high flow ratio Centrifugal extractors Handles low-density difference between phases Low holdup volume Short holdup time Low space requirements Small inventory of solvent High initial costs High operating cost High maintenance cost Limited number of stages (2-7) in single unit Process Yes Small volume Separators, centritugal extractors Makeup solvent Ehyl acetate-rich No Two quid phases Reftux Emulsion Yos formation, poor Separators separation Decanter With Centritugal extractors. No Posorva Graesser, RDC, ARD Extract tlons Ehyl acetate 67,112 Water Acetie acid Smalt number of theoretical stages equired (4 Water rich 6.660 6,649 Yes Mixer settler battery. centritugal extractor Yes LOw helght Distation No No Yes All column types. contritugal extractors Small noor Feed Glacial acetie adid area Acetic acid 6.00o water 23.600 Large number of theoretical stages requirid Yes mini Recycle solvent Water Ethy acetate ee.600 Yes LIquid-quld extraction Low height Mixer setler battery. Graesser 2.500 No Smail floor Yes area нiаn Yes throughput 50mn) Small load Yes Putsating sieve tray column, Kufini, Lurgi Ehyt acetatenich range tower extractor No No Yes Large load Pänge Rafinate Distlaton RDC, ARD Ethyi acetate 1,4 19,440 11 Water Acetic acid Yes throughput (<50mn) Low Small load Yes Putsating range packed column. Kar column No Large load range Yes Schelbel, Oldshue Rushton Note: Al flow rates are in ibh Wastrwater

Class of Equipment Advantages Disadvantages Mixer-settlers Good contacting Large holdup High power costs High investment Large floor space Interstage pumping may be required Handles wide flow ratio Low headroom High efficiency Many stages available Reliable scale-up Continuous, counterflow Low initial cost Limited throughput with small density difference Cannot handle high flow ratio High headroom Sometimes low efficiency Difficult scale-up Low operating cost Simplest construction contactors (no mechanical drive) Good dispersion Reasonable cost Continuous, counterflow contactors (mechanical agitation) Limited throughput with small density difference Cannot handle emulsifying Many stages possible Relatively easy scale-up systems Cannot handle high flow ratio Centrifugal extractors Handles low-density difference between phases Low holdup volume Short holdup time Low space requirements Small inventory of solvent High initial costs High operating cost High maintenance cost Limited number of stages (2-7) in single unit Process Yes Small volume Separators, centritugal extractors Makeup solvent Ehyl acetate-rich No Two quid phases Reftux Emulsion Yos formation, poor Separators separation Decanter With Centritugal extractors. No Posorva Graesser, RDC, ARD Extract tlons Ehyl acetate 67,112 Water Acetie acid Smalt number of theoretical stages equired (4 Water rich 6.660 6,649 Yes Mixer settler battery. centritugal extractor Yes LOw helght Distation No No Yes All column types. contritugal extractors Small noor Feed Glacial acetie adid area Acetic acid 6.00o water 23.600 Large number of theoretical stages requirid Yes mini Recycle solvent Water Ethy acetate ee.600 Yes LIquid-quld extraction Low height Mixer setler battery. Graesser 2.500 No Smail floor Yes area нiаn Yes throughput 50mn) Small load Yes Putsating sieve tray column, Kufini, Lurgi Ehyt acetatenich range tower extractor No No Yes Large load Pänge Rafinate Distlaton RDC, ARD Ethyi acetate 1,4 19,440 11 Water Acetic acid Yes throughput (<50mn) Low Small load Yes Putsating range packed column. Kar column No Large load range Yes Schelbel, Oldshue Rushton Note: Al flow rates are in ibh Wastrwater

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Based on Table  and the selection scheme in Figure , is an RDC appropriate for extraction of acetic acid from water by ethyl acetate in the process in Figure ? What other types of extractors might be considered?

Class of Equipment Advantages Disadvantages Mixer-settlers Good contacting Large holdup High power costs High investment Large floor space Interstage pumping may be required Handles wide flow ratio Low headroom High efficiency Many stages available Reliable scale-up Continuous, counterflow Low initial cost Limited throughput with small density difference Cannot handle high flow ratio High headroom Sometimes low efficiency Difficult scale-up Low operating cost Simplest construction contactors (no mechanical drive) Good dispersion Reasonable cost Continuous, counterflow contactors (mechanical agitation) Limited throughput with small density difference Cannot handle emulsifying Many stages possible Relatively easy scale-up systems Cannot handle high flow ratio Centrifugal extractors Handles low-density difference between phases Low holdup volume Short holdup time Low space requirements Small inventory of solvent High initial costs High operating cost High maintenance cost Limited number of stages (2-7) in single unit
Transcribed Image Text:Class of Equipment Advantages Disadvantages Mixer-settlers Good contacting Large holdup High power costs High investment Large floor space Interstage pumping may be required Handles wide flow ratio Low headroom High efficiency Many stages available Reliable scale-up Continuous, counterflow Low initial cost Limited throughput with small density difference Cannot handle high flow ratio High headroom Sometimes low efficiency Difficult scale-up Low operating cost Simplest construction contactors (no mechanical drive) Good dispersion Reasonable cost Continuous, counterflow contactors (mechanical agitation) Limited throughput with small density difference Cannot handle emulsifying Many stages possible Relatively easy scale-up systems Cannot handle high flow ratio Centrifugal extractors Handles low-density difference between phases Low holdup volume Short holdup time Low space requirements Small inventory of solvent High initial costs High operating cost High maintenance cost Limited number of stages (2-7) in single unit
Process Yes Small volume Separators, centritugal extractors Makeup solvent Ehyl acetate-rich No Two quid phases Reftux Emulsion Yos formation, poor Separators separation Decanter With Centritugal extractors. No Posorva Graesser, RDC, ARD Extract tlons Ehyl acetate 67,112 Water Acetie acid Smalt number of theoretical stages equired (4 Water rich 6.660 6,649 Yes Mixer settler battery. centritugal extractor Yes LOw helght Distation No No Yes All column types. contritugal extractors Small noor Feed Glacial acetie adid area Acetic acid 6.00o water 23.600 Large number of theoretical stages requirid Yes mini Recycle solvent Water Ethy acetate ee.600 Yes LIquid-quld extraction Low height Mixer setler battery. Graesser 2.500 No Smail floor Yes area нiаn Yes throughput 50mn) Small load Yes Putsating sieve tray column, Kufini, Lurgi Ehyt acetatenich range tower extractor No No Yes Large load Pänge Rafinate Distlaton RDC, ARD Ethyi acetate 1,4 19,440 11 Water Acetic acid Yes throughput (<50mn) Low Small load Yes Putsating range packed column. Kar column No Large load range Yes Schelbel, Oldshue Rushton Note: Al flow rates are in ibh Wastrwater
Transcribed Image Text:Process Yes Small volume Separators, centritugal extractors Makeup solvent Ehyl acetate-rich No Two quid phases Reftux Emulsion Yos formation, poor Separators separation Decanter With Centritugal extractors. No Posorva Graesser, RDC, ARD Extract tlons Ehyl acetate 67,112 Water Acetie acid Smalt number of theoretical stages equired (4 Water rich 6.660 6,649 Yes Mixer settler battery. centritugal extractor Yes LOw helght Distation No No Yes All column types. contritugal extractors Small noor Feed Glacial acetie adid area Acetic acid 6.00o water 23.600 Large number of theoretical stages requirid Yes mini Recycle solvent Water Ethy acetate ee.600 Yes LIquid-quld extraction Low height Mixer setler battery. Graesser 2.500 No Smail floor Yes area нiаn Yes throughput 50mn) Small load Yes Putsating sieve tray column, Kufini, Lurgi Ehyt acetatenich range tower extractor No No Yes Large load Pänge Rafinate Distlaton RDC, ARD Ethyi acetate 1,4 19,440 11 Water Acetic acid Yes throughput (<50mn) Low Small load Yes Putsating range packed column. Kar column No Large load range Yes Schelbel, Oldshue Rushton Note: Al flow rates are in ibh Wastrwater
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