EXAMPLE #2 Chemistries available for the manufacture of maleic anhydride ◆ From benzene C6H6+31202-><CHCO2>0+2C0+2H20 C6H6+4102->6C02+3H20 ◆ From butane C4H10+31202-><(CHCO2>0+4H20 C4H1+41202->4C0+5H20 CH1+61202->4C02+5H20 1l/19/99 Input-Output Structure11/19/99 Input-Output Structure 6 EXAMPLE #2 Chemistries available for the manufacture of maleic anhydride: u From benzene C6H6 + 3 1/2 O2 --> <(.CHCO)2>O + 2 CO + 2 H2O C6H6 + 4 1/2 O2 --> 6 CO2 + 3 H2O u From butane C4H10 + 3 1/2 O2 --> <(.CHCO)2>O + 4 H2O C4H10 + 4 1/2 O2 --> 4 CO + 5 H2O C4H10 + 6 1/2 O2 --> 4 CO2 + 5 H2O