Liquid-Liquid Extraction One thousand pounds per hour of a 40 wt% acetone (A) – 60 wt% water (W) solution is to be reduced to 5 wt% acetone with 400 lb/hr of 1,1,2-trichloroethane as solvent in a counter-current multistage contact operation. a) Determine the number of stages required for the separation. b) Find the intermediate concentrations of acetone in the extract and raffinate leaving each stage. c) Determine the flowrates of extract (E1) and raffinate (RN) using the graphical method and a component balance of your choice. Confirm your calculated balances using another component balance. d) What fraction of acetone (as % of the amount fed) would be recovered in the extract after two stages?
Liquid-Liquid Extraction One thousand pounds per hour of a 40 wt% acetone (A) – 60 wt% water (W) solution is to be reduced to 5 wt% acetone with 400 lb/hr of 1,1,2-trichloroethane as solvent in a counter-current multistage contact operation. a) Determine the number of stages required for the separation. b) Find the intermediate concentrations of acetone in the extract and raffinate leaving each stage. c) Determine the flowrates of extract (E1) and raffinate (RN) using the graphical method and a component balance of your choice. Confirm your calculated balances using another component balance. d) What fraction of acetone (as % of the amount fed) would be recovered in the extract after two stages?
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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Liquid-Liquid Extraction
One thousand pounds per hour of a 40 wt% acetone (A) – 60 wt% water (W) solution is to be reduced to
5 wt% acetone with 400 lb/hr of 1,1,2-trichloroethane as solvent in a counter-current multistage contact
operation.
a) Determine the number of stages required for the separation.
b) Find the intermediate concentrations of acetone in the extract and raffinate leaving each stage.
c) Determine the flowrates of extract (E1) and raffinate (RN) using the graphical method and a component
balance of your choice. Confirm your calculated balances using another component balance.
d) What fraction of acetone (as % of the amount fed) would be recovered in the extract after two stages?
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