Page 289 - Chemical engineering design

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(continued)
Table 6.4.
Cost £/unit
Chemical, and state CHEMICAL ENGINEERING Cost $/unit
Cost unit
Oxalic acid, sacks kg 0.58 0.96
Phenol kg 0.90 1.53
Phosgene, cyl. kg 1.09 1.62
Phosphoric acid 75% w/w kg 0.47 0.78
Potassium bicarbonate, sacks kg 0.45 0.75
Potassium carbonate, sacks kg 0.56 0.92
Potassium chloride t 70 110
Potassium chromate, sacks kg 0.80 1.30
Potassium hydroxide kg 2.00 3.70
Potassium nitrate, bulk t 350 570
Propylene kg 0.43 0.64
Propylene oxide kg 1.00 1.60
n-Propanol kg 0.93 1.438
Sodium carbonate, sacks kg 0.35 0.58
Sodium chloride, drums kg 0.40 0.65
Sodium hydroxide, drums kg 1.60 2.60
Sodium sulphate, bulk t 72 120
Sodium thiosulphate kg 0.38 0.57
Sulphur, crude, 99.5%, sacks t 85 140
Sulphuric acid, 98% w/w t 40 65
Titanium dioxide, sacks kg 1.50 2.50
Toluene kg 0.32 0.47
Toluene diisocyanate kg 2.20 3.20
Trichloroethane kg 0.56 0.94
Trichloroethylene kg 0.84 1.40
Urea, 46% nitrogen, bulk t 120 160
Vinyl acetate kg 0.65 1.08
Vinyl chloride kg 0.44 0.66
Xylenes kg 0.29 0.43
Anhyd. = anhydrous, cyl. = cylinder, refin. = refined
Caution: Use these prices only as a rough guide to the probable price range.
Actual prices at a given time will vary considerably from these values, depending
on location, contract quantities, and the prevailing market forces.

Table 6.5. Cost of utilities, typical figures mid-2004
Utility UK USA
Mains water (process water) 60 p/t 50 c/t
Natural gas 0.4 p/MJ 0.7 c/MJ
Electricity 1.0 p/MJ 1.5 c/MJ
Fuel oil 65 £/t 100 $/t
Cooling water (cooling towers) 1.5 p/t 1 c/t
Chilled water 5 p/t 8 c/t
Demineralised water 90 p/t 90 c/t
Steam (from direct fired boilers) 7 £/t 12 $/t
3
Compressed air (9 bar) 0.4 p/m (Stp) 0.6 c/m 3
3
Instrument air (9 bar) (dry) 0.6 p/m (Stp) 1 c/m 3
Refrigeration 1.0 p/MJ 1.5 c/MJ
3
Nitrogen 6 p/m (Stp) 8 c/m 3
Note: £1 D 100p, 1$ D 100c, 1 t D 1000 kg D 2200 ib, stp D 1atm, 0 ° C
These prices should be used only as a rough guide to the likely cost of
utilities. The cost of water will be very dependent on the plant location, and
the price of all utilities will be determined by the current cost of energy.