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3. Chemical company recovers crystalline K2CrO4from aqueous solution of the salt using evaporation and crystallization methods. 45000 kg/hr of a solution that is one-third K2CRO4 by mass is joined by a recycle stream containing 36.4% K2CrO4 and the combined stream is fed to an evaporator. The concentrated stream leaving the evaporator contains 49.4% K2CrO4. This stream is fed to a crystallizer in which it is cooled (causing crystals of K2CRO4, to come out of solution) and then filtered. The wet filter cake consists of K2CRO4 crystals and solution that contains 36.4%K2CRO4 by mass. The crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K2CrO4by mass, is the recycle stream. Using the labelled figure below, determine i.Mass rate into the evaporator (m1), evaporation rate (m2), feed rate tothe crystallizer (m3) ii.Also determinem4, m5 andm6 iii.What is the recycle ratio(mass of recycle/mass of fresh feed)? Fresh feed Filser cake 4500 kph g Kih) CRYSTALLIZI AND FILTER EVAPORATOR 0333 kg Kg G667 kg Wg 0.94 kg Kkg 0506 kg WAg mykg solnh) 0364 kg Kkg soln 066 kg Wikg soln (1-kg WAg) Fitrale (recycle) 0.364 kg KAg 066 kg WAg

3. Chemical company recovers crystalline K2CrO4from aqueous solution of the salt using evaporation and crystallization methods. 45000 kg/hr of a solution that is one-third K2CRO4 by mass is joined by a recycle stream containing 36.4% K2CrO4 and the combined stream is fed to an evaporator. The concentrated stream leaving the evaporator contains 49.4% K2CrO4. This stream is fed to a crystallizer in which it is cooled (causing crystals of K2CRO4, to come out of solution) and then filtered. The wet filter cake consists of K2CRO4 crystals and solution that contains 36.4%K2CRO4 by mass. The crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K2CrO4by mass, is the recycle stream. Using the labelled figure below, determine i.Mass rate into the evaporator (m1), evaporation rate (m2), feed rate tothe crystallizer (m3) ii.Also determinem4, m5 andm6 iii.What is the recycle ratio(mass of recycle/mass of fresh feed)? Fresh feed Filser cake 4500 kph g Kih) CRYSTALLIZI AND FILTER EVAPORATOR 0333 kg Kg G667 kg Wg 0.94 kg Kkg 0506 kg WAg mykg solnh) 0364 kg Kkg soln 066 kg Wikg soln (1-kg WAg) Fitrale (recycle) 0.364 kg KAg 066 kg WAg

Introduction to Chemical Engineering Thermodynamics
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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Fresh feed Filser cake 4500 kph kgh) kg Kish) CRYSTALLIZIR AND PILTER EVAPORATOR 0.33 kg K/kg 0667 kg Wkg 1 (kg KAg) (I-1kg Wkg) 0.94 kg Kkg 0.506 kg Wkg niy(kg solnh) 0.364 kg Kkg soln 0.636 kg W/kg soln Filtrate (recycle) 0.364 kg KAg 0.636 kg WAg
Transcribed Image Text:Fresh feed Filser cake 4500 kph kgh) kg Kish) CRYSTALLIZIR AND PILTER EVAPORATOR 0.33 kg K/kg 0667 kg Wkg 1 (kg KAg) (I-1kg Wkg) 0.94 kg Kkg 0.506 kg Wkg niy(kg solnh) 0.364 kg Kkg soln 0.636 kg W/kg soln Filtrate (recycle) 0.364 kg KAg 0.636 kg WAg
3. Chemical company recovers crystalline K2CrO4from aqueous solution of the salt using evaporation and crystallization methods. 45000 kg/hr of a solution that is one-third K2CRO4 by mass is joined by a recycle stream containing 36.4% K2CrO4 and the combined stream is fed to an evaporator. The concentrated stream leaving the evaporator contains 49.4% K2CrO4. This stream is fed to a crystallizer in which it is cooled (causing crystals of K2CrO4, to come out of solution) and then filtered. The wet filter cake consists of K2CrO4 crystals and solution that contains 36.4%K2CrO4 by mass. The crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K2CrO4by mass, is the recycle stream. Using the labelled figure below, determine i.Mass rate into the evaporator (m1), evaporation rate (m2), feed rate tothe crystallizer (m3) ii.Also determinem4, m5 andm6 ii.What is the recycle ratio(mass of recycle/mass of fresh feed)? kg W(vyh) Fresh feed Pitser cake kgh) 4500 kyoh 0333 kg Kg G667 kg Wg EVAPORATOR CRYSTALLIZIK t: kg KAg) (1-kg WAg) 0,94 kg Kkg AND FILTER 0364 kg Kkg soln 0636 kg Wkg soln 0.506 kg Wkg Filtrate (recycle) 0.364 kg KAg 0636 kg WAg
Transcribed Image Text:3. Chemical company recovers crystalline K2CrO4from aqueous solution of the salt using evaporation and crystallization methods. 45000 kg/hr of a solution that is one-third K2CRO4 by mass is joined by a recycle stream containing 36.4% K2CrO4 and the combined stream is fed to an evaporator. The concentrated stream leaving the evaporator contains 49.4% K2CrO4. This stream is fed to a crystallizer in which it is cooled (causing crystals of K2CrO4, to come out of solution) and then filtered. The wet filter cake consists of K2CrO4 crystals and solution that contains 36.4%K2CrO4 by mass. The crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K2CrO4by mass, is the recycle stream. Using the labelled figure below, determine i.Mass rate into the evaporator (m1), evaporation rate (m2), feed rate tothe crystallizer (m3) ii.Also determinem4, m5 andm6 ii.What is the recycle ratio(mass of recycle/mass of fresh feed)? kg W(vyh) Fresh feed Pitser cake kgh) 4500 kyoh 0333 kg Kg G667 kg Wg EVAPORATOR CRYSTALLIZIK t: kg KAg) (1-kg WAg) 0,94 kg Kkg AND FILTER 0364 kg Kkg soln 0636 kg Wkg soln 0.506 kg Wkg Filtrate (recycle) 0.364 kg KAg 0636 kg WAg
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