Assignment 1 Solutions - 0123/); +27% + Vb ’0 {MMHO 3,93%...

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Unformatted text preview: 0123/); +27% + Vb ’0 {MMHO 3,93% 1:) V3 : __ 3714—7 ’2 57a; ,/'/ My. . Cflaufilfi'R 7‘ 3M” 0,1 : 7L ‘ C02 ’“ 07*” 0420/: / Llfim Z ! MWWWWWM ,,,,,,,, WW WWWWWWWWWWWWWWWWWWWW «W 5 3) The reactions are balanced by writing element balance equations and solving simultaneously. The balanced equations are given, along with a calculation of atom economy. Hydrogenation: (a) conventional 3 i Cffiii-iflilifitvi 3 + ZNa’Bi-M ~t~~ ago ($62215(t1~i(t).i:i)crag +- 13:33“)ng 4 ii Ct'mmfnia [- n (Tfi-tfifffit;€.).i:~§j}C‘ii§‘3 Atom economy = 122l(120+9.5+18) = 0.83 (b) catalytic iMi ‘ '28 15 i 3 (i'fgf’fngCKt-i t»- H —> ('7. 61:1 {fit-ti: (If-{EH 3 I Atom economy = 1.0! Oxidation: (a) conventional i c:(ii-{scr‘i-igot-iin};3 .i.:C:103 + i-igsoé (161-; SCGCi-t 3 -l~ 3- .3 g. C172 (304 -i- 21"13 . Cf,RZSCE‘Eifi'CilEiiflei-i; _ mm _ cf,ng (::i:)(:ist.3 Atom economy = 120l(122+66.7+98) = 0.42 (b) catalytic 5:75»;((‘_>i-£long + 324:)? m» (7:6;4'561363-ts + :23»; 30] Atom economy = 120/(122+34) = 0.77 C-C bond formation (a) conventional (351'! Sflifiiilfi-ijc 3315 + M334» (30,? + BIKE! C7653}5C3§iCfl3CGDH + MgCI-g +- 3311:) Mi WM; - ~ +¥ Atom economy = 150/(122+24+44+73) = 0.57 (b) catalytic C‘. {Jr-QCl':i{:()§--i}C'i'-{3 -+- CO -* (3 5H SCITFi'Cf-i £130“. Atom economy = 1.0! 5) The reactions are 1 {:3}: 501-: + :03 w.» (33301110 at, 330 (R if; (rt-3.30110 £41): a Cit-3COQH (R2) :- Water is the only byproduct. The generation-consumption analysis is shown in the table. n (first: --— At 0.77 kg ethanol consumed per kg acetic acid generated, and $0.80/kg ethanol, the minimum selling price for acetic acid is 0.77($0.80) = $0.62/kg. 6) Reaction pathway 1: The balanced chemical reactions are Cifil-igN-g -+- 4H3; (ifit-imNz (R2) The process economy evaluation, at 116,000 Ib/day, is summarized in a table. cmnwund 'X’M Mi III - €1.93 .- ' ‘ ‘: -' 1115. +3 16 ----- Raw material costs are $62,280/day at the desired production rate. Reaction pathway 2: The balanced chemical reactions are CaliiSNg + 4&1: ""~"‘ Cal-imN z The process economy evaluation, at 116,000 Iblday, is summarized in a table. campmnd 1*, v2 vm Mi vm M, 1.11 fifth {SF a HEN}? - 433,980 ------ ------ Raw material costs are $69,800/day at the desired production rate, or roughly 10% higher than in reaction pathway 1. However, no HCN is required, increasing the safety of the process. The cost differential is insufficient to justify the increased risks associated with process 1. ...
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This note was uploaded on 04/05/2010 for the course CHEBE 241 taught by Professor Ali during the Winter '08 term at The University of British Columbia.

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Assignment 1 Solutions - 0123/); +27% + Vb ’0 {MMHO 3,93%...

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