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Titanium dioxide (TIO:) is used extensively as a white pigment. It is produced from an ore that con- tains ilmenite (FeTiO,) and ferric oxide (Fe;O,). The ore is digested with an aqueous suifuric acid solution to produce an aqueous solution of titanyl sulfate ((TiŌ)SO,) and ferrous sulfate (FeSO,). Water is added to hydrolyze the titanyl sulfate to H;TIO,, which precipitates, and H;SO.. The pre- cipitate is then roasted, driving off water and leaving a residue of pure titanium dioxide. (Several steps to remove iron from the intermediate solutions as iron sulfate have been omitted from this description.) Suppose an ore containing 24.3% Ti by mass is digested with an 80% H;SO, solution, supplied in 50% excess of the amount needed to convert all the ilmenite to titanyl sulfate and all the ferric oxide to ferric sulfate [Fe;(SO,}»]. Further suppose that 89% of the ilmenite actually decomposes. Calculate the masses (kg) of ore and 80% sulfuric acid solution that must be fed to produce 100 kg of pure TiO;. What mass of ore needs to be fed to produce 1000 kg pure titanium dioxide? What is the amount (kmol) of 80% sulfuric acid solution needed to produce 1000 kg pure titanium dioxide?

Titanium dioxide (TIO:) is used extensively as a white pigment. It is produced from an ore that con- tains ilmenite (FeTiO,) and ferric oxide (Fe;O,). The ore is digested with an aqueous suifuric acid solution to produce an aqueous solution of titanyl sulfate ((TiŌ)SO,) and ferrous sulfate (FeSO,). Water is added to hydrolyze the titanyl sulfate to H;TIO,, which precipitates, and H;SO.. The pre- cipitate is then roasted, driving off water and leaving a residue of pure titanium dioxide. (Several steps to remove iron from the intermediate solutions as iron sulfate have been omitted from this description.) Suppose an ore containing 24.3% Ti by mass is digested with an 80% H;SO, solution, supplied in 50% excess of the amount needed to convert all the ilmenite to titanyl sulfate and all the ferric oxide to ferric sulfate [Fe;(SO,}»]. Further suppose that 89% of the ilmenite actually decomposes. Calculate the masses (kg) of ore and 80% sulfuric acid solution that must be fed to produce 100 kg of pure TiO;. What mass of ore needs to be fed to produce 1000 kg pure titanium dioxide? What is the amount (kmol) of 80% sulfuric acid solution needed to produce 1000 kg pure titanium dioxide?

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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Titanium dioxide (TIO:) is used extensively as a white pigment. It is produced from an ore that con- tains ilmenite (FETIO,) and ferric oxide (Fe,0,). The ore is digested with an aqueous suifuric acid solution to produce an aqueous solution of titanyl sulfate [(TiO)SO.] and ferrous sulfate (FeSO,). Water is added to hydrolyze the titanyl sulfate to H;TIO3, which precipitates, and H2SO.. The pre- cipitate is then roasted, driving off water and leaving a residue of pure titanium dioxide. (Several steps to remove iron from the intermediate solutions as iron sulfate have been omitted from this description.) Suppose an ore containing 24.3% Ti by mass is digested with an 80% H;SO, solution, supplied 50% excess of the amount needed to convert all the ilmenite to titanyl sulfate and all the ferric oxide to ferric sulfate [Fe;(SO,)). Further suppose that 89% of the ilmenite actually decomposes. Calculate the masses (kg) of ore and 80% sulfuric acid solution that must be fed to produce 1000 kg of pure TiOz. What mass of ore needs to be fed to produce 1000 kg pure titanium dioxide? What is the amount (kmol) of 80% sulfuric acid solution needed to produce 1000 kg pure titanium dioxide? :: 2,550 kg ore :: 2,670 kg ore :: 2,770 kg ore :: 40.12 kmol :: 60.18 kmol :: 50.18 kmol
Transcribed Image Text:Titanium dioxide (TIO:) is used extensively as a white pigment. It is produced from an ore that con- tains ilmenite (FETIO,) and ferric oxide (Fe,0,). The ore is digested with an aqueous suifuric acid solution to produce an aqueous solution of titanyl sulfate [(TiO)SO.] and ferrous sulfate (FeSO,). Water is added to hydrolyze the titanyl sulfate to H;TIO3, which precipitates, and H2SO.. The pre- cipitate is then roasted, driving off water and leaving a residue of pure titanium dioxide. (Several steps to remove iron from the intermediate solutions as iron sulfate have been omitted from this description.) Suppose an ore containing 24.3% Ti by mass is digested with an 80% H;SO, solution, supplied 50% excess of the amount needed to convert all the ilmenite to titanyl sulfate and all the ferric oxide to ferric sulfate [Fe;(SO,)). Further suppose that 89% of the ilmenite actually decomposes. Calculate the masses (kg) of ore and 80% sulfuric acid solution that must be fed to produce 1000 kg of pure TiOz. What mass of ore needs to be fed to produce 1000 kg pure titanium dioxide? What is the amount (kmol) of 80% sulfuric acid solution needed to produce 1000 kg pure titanium dioxide? :: 2,550 kg ore :: 2,670 kg ore :: 2,770 kg ore :: 40.12 kmol :: 60.18 kmol :: 50.18 kmol
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