The original stress applied to the polymer for the given application should be calculated. Concept Introduction: The formula to calculate stress ( σ ) on a polymer after time ' t ' is: σ = σ o exp ( − t λ ) ....... (1) Here, σ o is the initial stress applied on the polymer and λ is the relaxation time.

Question

Use the binary diagram, 45 line above and material balance to solve the One thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous, countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the following equilibrium data, determine with an equilateral-triangle diagram: a the minimum flow rate of solvent; b. the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each streamleaving each stage. Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water impurities) acetone 0.6 water 0.13 1,1,2-trichloroethane 0.27 Raffinate. Weight Fraction Acetone Extract. Weight Fraction Acetone 0.5 0.04 0.46 0.44 0.56 0.4 0.03 0.57 0.29 0.40 0.3 0.02 0.681 0.12 0.18 0.2 0.015 0.785 0.0 0.0 0.1 0.01 0.89 0.55 0.35 0.1 0.5 0.43 0.07 0.4 0.57 0.03 0.3 0.68 0.02 0.2 0.79 0.01 0.1 0.895 0.005

Answer 1

Question

Chapter 16, Problem 16.32P

Interpretation Introduction

Interpretation:

The original stress applied to the polymer for the given application should be calculated.

Concept Introduction:

The formula to calculate stress (σ) on a polymer after time ' t ' is:

σ=σoexp(−tλ) ....... (1)

Here, σo is the initial stress applied on the polymer and λ is the relaxation time.

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Use the binary diagram, 45 line above and material balance to solve the One thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous, countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the following equilibrium data, determine with an equilateral-triangle diagram: a the minimum flow rate of solvent; b. the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each streamleaving each stage. Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water impurities) acetone 0.6 water 0.13 1,1,2-trichloroethane 0.27 Raffinate. Weight Fraction Acetone Extract. Weight Fraction Acetone 0.5 0.04 0.46 0.44 0.56 0.4 0.03 0.57 0.29 0.40 0.3 0.02 0.681 0.12 0.18 0.2 0.015 0.785 0.0 0.0 0.1 0.01 0.89 0.55 0.35 0.1 0.5 0.43 0.07 0.4 0.57 0.03 0.3 0.68 0.02 0.2 0.79 0.01 0.1 0.895 0.005

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