HW11ChE 150B F2009

HW11ChE 150B F2009 - o C in a continuous countercurrent...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ChE 150B Problem Set 11 Due November 13, 2009 Problem 1 . (20 Points) Using the data below, construct the following graphs: (a) An equilateral ternary diagram of acetone as the solute, water as the carrier, and 1,1,2-trichloroethane as the solvent. Be sure to include the tie lines on the graph. (b) Compute the selectivity of the solute (pure acetone) for solvent (pure 1,1,2- trichloroethane) at each tie line. Then, plot selectivity versus the concentration of 1,1,2-trichloroethane in the carrier (pure water). Acetone-Water-1,1,2-Trichloroethane Compositions on Phase Boundary: Extract, wt% Raffinate, wt% Acetone Water Trichloroethane Acetone Water Trichloroethane 60 13 27 55 35 10 50 4 46 50 43 7 40 3 57 40 57 3 30 2 68 30 68 2 20 1.5 78.5 20 79 1 10 1 89 10 89.5 0.5 Tie-line Data: Extract, wt% Acetone Raffinate, wt% Acetone 56 44 40 29 18 12 Problem 2. (25 Points) One thousand kilograms per hour of a 45 wt% acetone-in-water solution is to be extracted at 25
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o C in a continuous countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using equilateral ternary diagram from Problem 1 , determine the following: (a) the minimum flow rate of solvent, (b) the number of stages required for a solvent rate equal to 1.5 times the minimum, (c) the flow rate and composition of both the raffinate leaving the last stage and extract leaving the first stage, and (d) the flow rate and composition of the raffinate leaving the second stage. Problem 3. (20 Points) For the conditions of Problem 2, find the number of stages required for the separation using a McCabe-Thiele diagram. Plot the operating line for the extractor on the McCabe-Thiele diagram for the condition of minimum solvent-to-feed ratio. [Hint: Read section 8.4 of Seder and Henley to see how the McCabe-Thiele diagram is related to the equilateral triangle diagram.]...
View Full Document

Page1 / 2

HW11ChE 150B F2009 - o C in a continuous countercurrent...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online