3. [Green metrics] Maleic anhydride may be prepared using two synthetic routes: Route 1: Oxidation of benzene: 12/0₂ Route 2: Oxidation of but-1-ene: + + 2CO2 + 2 H2O +30₂ The benzene oxidation route typically occurs in 65 % yield, while the but-1-ene route only gives yields of 55 %. + 3H₂O a) Assuming that each reaction is performed in the gas phase only, and that no additional chemicals are required, calculate: (i) the atom economy and (ii) the effective mass yield of both reactions. You should assume that O2, CO2 and H₂O are not toxic. [Ans: atom econ (route 1) ~ 44%; EMY (route 1) ≈ 81.7%; atom econ (route 2) ≈ 64%; EMY (route 2) ≈ 96.3%] b) Which route would you recommend to industry? Outline the factors that influenced your decision.

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
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3. [Green metrics] Maleic anhydride may be prepared using two synthetic routes:
Route 1: Oxidation of benzene:
12/0₂
Route 2: Oxidation of but-1-ene:
+ 30₂
+
+ 2CO2 + 2 H2O
ܘܟ ܘ ܗܘ
+ 3 H₂O
The benzene oxidation route typically occurs in 65 % yield, while the but-1-ene route only gives
yields of 55 %.
a) Assuming that each reaction is performed in the gas phase only, and that no additional
chemicals are required, calculate: (i) the atom economy and (ii) the effective mass yield of
both reactions. You should assume that O2, CO2 and H₂O are not toxic.
[Ans: atom econ (route 1)≈ 44%; EMY (route 1) ≈ 81.7%; atom econ (route 2) ≈ 64%; EMY (route 2) = 96.3%]
b) Which route would you recommend to industry? Outline the factors that influenced your
decision.
Transcribed Image Text:3. [Green metrics] Maleic anhydride may be prepared using two synthetic routes: Route 1: Oxidation of benzene: 12/0₂ Route 2: Oxidation of but-1-ene: + 30₂ + + 2CO2 + 2 H2O ܘܟ ܘ ܗܘ + 3 H₂O The benzene oxidation route typically occurs in 65 % yield, while the but-1-ene route only gives yields of 55 %. a) Assuming that each reaction is performed in the gas phase only, and that no additional chemicals are required, calculate: (i) the atom economy and (ii) the effective mass yield of both reactions. You should assume that O2, CO2 and H₂O are not toxic. [Ans: atom econ (route 1)≈ 44%; EMY (route 1) ≈ 81.7%; atom econ (route 2) ≈ 64%; EMY (route 2) = 96.3%] b) Which route would you recommend to industry? Outline the factors that influenced your decision.
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