Titanium dioxide, which is the most common white pigment in paint, can be produced from the titanium mineral, rutile, by chlorination to TiCl4, followed by oxidation to TiO2. To purify the insoluble titanium dioxide, it is washed free of soluble impurities in a continuous, countercurrent system of thickeners with water.  Two hundred thousand kg/h of 99.9 wt% titanium dioxide pigment is to be produced by washing, followed by filtering and drying.  The feed contains 50 wt% TiO2, 20 wt% soluble salts and 30 wt% water.  The wash liquid is pure water at a flow rate equal to that of the feed on a mass flow basis   .Determine the number of ideal stages using the McCabe-Smith method. kg solute/kg solution kg solution/kg TiO2 0.0 0.30 0.2 0.34 0.4 0.38 0.6 0.42

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter21: Heparin Infusion Calculations
Section: Chapter Questions
Problem 1.3P
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Titanium dioxide, which is the most common white pigment in paint, can be produced from the titanium mineral, rutile, by chlorination to TiCl4, followed by oxidation to TiO2. To purify the insoluble titanium dioxide, it is washed free of soluble impurities in a continuous, countercurrent system of thickeners with water.  Two hundred thousand kg/h of 99.9 wt% titanium dioxide pigment is to be produced by washing, followed by filtering and drying.  The feed contains 50 wt% TiO2, 20 wt% soluble salts and 30 wt% water.  The wash liquid is pure water at a flow rate equal to that of the feed on a mass flow basis

 

.Determine the number of ideal stages using the McCabe-Smith method.

kg solute/kg solution

kg solution/kg TiO2

0.0

0.30

0.2

0.34

0.4

0.38

0.6

0.42

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