CaCO3 precipitate can be produced by reaction of an aqueous solution of Na2CO3 and CaO, the by-product being NaOH. Following decantation, slurry leaving the precipitation tank is 5 wt% CaCO3, 0.1 wt% NaOH, and the balance water. 1000 kg/h of slurry is fed to a two stage continuous countercurrent washing system to be washed with 20000 lb/h of water. Underflow from each thickener will contain 20 wt% solids. Determine % recovery of NaOH in the extract and wt% NaOH in the dried CaCO3 Is it worthwhile to add a third stage.
CaCO3 precipitate can be produced by reaction of an aqueous solution of Na2CO3 and CaO, the by-product being NaOH. Following decantation, slurry leaving the precipitation tank is 5 wt% CaCO3, 0.1 wt% NaOH, and the balance water. 1000 kg/h of slurry is fed to a two stage continuous countercurrent washing system to be washed with 20000 lb/h of water. Underflow from each thickener will contain 20 wt% solids. Determine % recovery of NaOH in the extract and wt% NaOH in the dried CaCO3 Is it worthwhile to add a third stage.
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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- CaCO3 precipitate can be produced by reaction of an aqueous solution of Na2CO3 and CaO, the by-product being NaOH. Following decantation, slurry leaving the precipitation tank is 5 wt% CaCO3, 0.1 wt% NaOH, and the balance water. 1000 kg/h of slurry is fed to a two stage continuous countercurrent washing system to be washed with 20000 lb/h of water. Underflow from each thickener will contain 20 wt% solids. Determine % recovery of NaOH in the extract and wt% NaOH in the dried CaCO3 Is it worthwhile to add a third stage.
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