meb for salailylic acid
DESCRIPTION
salaliyalic acidTRANSCRIPT
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Material Balance
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Chemical reaction:
1 mole = 1 mole = 1 mole = 1 mole
Molecular weight of Acetic Anhydride = 102.09 (EXCESS REACTANT) Molecular weight of Salicylic Acid = 138.12 (LIMITING REACTANT) Molecular weight of Acetyl Salicylic Acid = 180.16 (MAIN PRODUCT) Molecular weight of Acetic Acid = 60 (BY-PRDOUCT)
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STOICHIOMETRY BALANCE FOR 100% YEILD: (Kg basis) Limiting component: 138.12 Salicylic Acid required = 180.16 Acetyl Salicylic Acid ? = 4000 kg Salicylic Acid required = 3067.5 kg. FOR 90% CONVERSION: Salicylic Acid required = 3067.5/0.9 = 3407.8 Kg.
EXCESS COMPONENT: FOR 100% YEILD: (Kg basis) 102.09 Acetic Anhydride required = 180.16 Acetyl Salicylic Acid ? = 4000 kg Acetic Anhydride required = 2266.6 Kg FOR 90% CONVERSION: Acetic Anhydride required = 2266.6/0.9 = 2518.5 Kg
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SOLVENT REQURIED: SOLVENT: Acetic Anhydride = (1:1.13) Toluene Required = 2518.5/1.3 =1937.3 Kg. CATALYST REQURIED: 1.5% OF WEIGHT OF Salicylic Acid = .015* 3407.8 Sulphuric acid required = 51.117 Kg PRODUCT FORMED: Acetyl Salicylic Acid Formed = 4000 kg BY PRODUCT FORMED: Acetic Acid Formed = 1332.149 Kg.
STOICHIOMETRY BALANCE
RECYCLE REACTION: Ketene + Acetic Acid Acetic Anhydride 1 mole = 1 mole = 1 mole 42 kg ketene = 60 kg Acetic Acid ? = 1332.149 Ketene Required = 932.50 Kg. Acetic Anhydride Formed = 2266.65
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EQUIPMENT WISE MATERIAL BALANCE
Input Output
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MATERIAL BALANCE OVER REACTOR
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MATERIALS ENTERING (Kg) LEAVING(Kg)
Acetic Anhydride 2518.5 251.9
Salicylic Acid 3407.8 340.3
Toluene 1937.8 1937.8
Acetyl Salicylic Acid 0 4000
Acetic Acid 0 1332.449
Sulphuric Acid 51.117 51.117
TOTAL 7915.217 7915.21
MATERIAL BALANCE OVER REACTOR
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MATERIAL BALANCE OVER CRYSTALLIZER
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MATERIAL BALANCE OVER CRYSTALLIZER
MATERIALS ENTERING (Kg) LEAVING(Kg)
Acetic Anhydride 251.9 251.9
Salicylic Acid 340.8 340.3
Toluene 1937.8 1937.8
Acetyl Salicylic Acid(Crys) 0 3500
Acetyl Salicylic Acid(liqu) 4000 500
Acetic Acid 1332.449 1332.449
Sulphuric Acid 51.117 51.117
TOTAL 7914.066 7913.566
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MATERIAL BALANCE OVER FILTER
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MATERIAL BALANCE OVER FILTER
MATERIALS ENTERING (Kg) LEAVING(Kg) TOP LEAVING(Kg) BOTTOM
Acetic Anhydride 251.9 251.9 0
Salicylic Acid 340.8 340.3 0
Toluene 2228.47 2028.47 20
Acetyl Salicylic Acid(Crys) 3500 0 3500
Acetyl Salicylic Acid(liqu) 500 500 0
Acetic Acid 1332.449 1332.449 0
Sulphuric Acid 51.117 51.117 0
TOTAL 8204.736 4504.236 3520
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MATERIAL BALANCE OVER ABSORBER
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MATERIALS ENTERING (Kg) LEAVING(Kg) TOP
Acetic Anhydride 251.9 2517
Salicylic Acid 340.8 340.3
Toluene 2228.47 2228.47
KEYENE GAS 932.5 0
Acetyl Salicylic Acid(liqu) 500 500
Acetic Acid 1332.449 0
Sulphuric Acid 51.117 51.117
TOTAL 5637.236 5636.887
MATERIAL BALANCE OVER ABSORBER
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ENERGY BALANCE
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ENERGY BALANCE
MATERIALS MASS MASS FRACTION Cp in J/Kg Cp*w in J/Kg
Toluene 1937.8 0.244 1.13 0.2766
Sulphuric Acid 51.117 0.006 1.14 0.0091
Acetic Anhydride 2518.5 0.32 1.17 0.372
Salicylic Acid 3407.8 0.43 1.81 0.778
TOTAL 7915.217 1 1.4357
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ENERGY BALANCE OVER REACTOR
HEAT OF REACTION (Q) = -84J/g.mol dt of steam = 110-100 = 100c dt of mixture = 90-25 = 650c Cp of steam at 1100c =2.03 Cp of mixture =1.357 Q + Ms* Cps* dts = m*Cpm* dtm -84 + Ms * 2.30*10 = 7915.217 * (1.43)*65 Ms=362.4kg
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ENERGY BALANCE OVER CRYSTALIZER
dt of WATER = 36-28 = 80c dt of mixture = 90-45 = 450c Cp of WATER =4.17 J/Kg Mw* Cpw* dtw = m*Cpm* dtm Mw*4.17*8 = 7915.217 * (1.43)*45 Mw=152.6807 Kg of cold water is required