dewatering column plus aa grade methanol distillation
DESCRIPTION
Dewatering Column plus AA Grade Methanol Distillation Case Study #06250414GBHTRANSCRIPT
Dewatering Column plus AA Grade Methanol Distillation
Case Study #06250414GBH
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Dewatering Column
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Dewatering Column: Design Basis
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Feed Product O/H Vapor Bottoms
Prim Cond Liq
Sec Cond Liq
Temperature C 80.0 77.9 45.0 123.3 45.0 74.3 Pressure bar 2.0 1.6 1.3 2.2 2.0 1.5 Vapor Frac 0.0 0.0 1.0 0.0 0.0 0.0 Mole Flow kmol/hr 6932.2 5313.4 19.8 1599.0 1595.3 6762.6 Mass Flow kg/hr 193795 164203 786 28806 51411 215987 Mole Flow kmol/hr CH4 0.35 0.00 0.35 0.00 0.08 0.00 CO2 10.26 0.06 10.20 0.00 11.07 0.79 CO 0.00 0.00 0.00 0.00 0.00 0.00 N2 0.00 0.00 0.00 0.00 0.00 0.00 H2 0.01 0.00 0.01 0.00 0.00 0.00 METHANOL 4884.63 4877.99 6.63 0.01 1561.10 6702.38 ETHANOL 0.84 0.84 0.00 0.00 0.04 0.28 PROPANOL 0.42 0.42 0.00 0.00 0.00 0.02 BUTANOL 0.21 0.21 0.00 0.00 0.00 0.00 DME 2.69 0.11 2.58 0.00 17.31 4.11 WATER 2032.76 433.80 0.01 1598.95 5.66 54.98 ACETONE 0.00 0.00 0.00 0.00 0.00 0.00 MEK 0.00 0.00 0.00 0.00 0.00 0.00 MF 0.00 0.00 0.00 0.00 0.00 0.00 Mass Frac CH4 0.000029 0.000000 0.007131 0.000000 0.000025 0.000000 CO2 0.002330 0.000016 0.571071 0.000000 0.009479 0.000160 CO 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 N2 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 H2 0.000000 0.000000 0.000026 0.000000 0.000000 0.000000 METHANOL 0.807625 0.951876 0.270188 0.000013 0.972965 0.994314 ETHANOL 0.000200 0.000236 0.000005 0.000000 0.000034 0.000059 PROPANOL 0.000130 0.000154 0.000000 0.000000 0.000001 0.000005 BUTANOL 0.000080 0.000095 0.000000 0.000000 0.000000 0.000000 DME 0.000639 0.000030 0.151382 0.000000 0.015511 0.000876 WATER 0.188966 0.047594 0.000197 0.999987 0.001984 0.004586 ACETONE 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 MEK 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
Dewatering Column plus AA Grade Methanol
GBH ENTERPRISES, LTD
Dewatering Column plus AA Grade Methanol
GBH ENTERPRISES, LTD
Dewatering Column plus AA Grade Methanol
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Dewatering Column plus AA Grade Methanol Performance Simulation Results
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APPENDIX
Typical Crude Analysis
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Ethanol Acetone Propanol's Butanol's Methyl Formate Di Methyl Ether Alkanes
+ Dissolved CO2, CH4
300 ppm ~10 ppm 200 ppm 80 ppm 400 ppm 100 ppm 50-100 ppm
Crude 10 ppm 20 ppm
Refined Spec
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Characteristics Acetone Ethanol Acidity Appearance Hydrocarbons Gravity Minimum methanol PFT Water Smell
Grade AA 20 ppm 10 ppm n/a Clear and no sediment miscibility test clear in 20 mins 793 kg/m3 98.5% 60 minutes 0.1% No characteristic smell.
Product Methanol Specifications
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'A' grade methanol 'AA' grade methanol IMPCA grade methanol
Minimum Permanganate Fading Time (minutes)
30 30 60
Acetone (wt ppm) 30 20 30
The two key impurity specifications for methanol : are acetone and PFT
Product Methanol Specifications
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The respective ethanol limits in the methanol product are: 'A' grade: no spec 'AA' grade: 10 wt ppm IMPCA: 50 wt ppm The respective water limits in the methanol product are: 'A' grade: 0.15% w/w 'AA' grade: 0.1% w/w IMPCA: 0.1% w/w
Two Column System: Standard Design
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Three Column System: Improved Energy Utilization
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