PRARANCANGAN PABRIK MALEIC ANHYDRIDE DARI BENZENA DENGAN KAPASITAS 28.000 TON PER TAHUN

Maleic anhydride is made by an oxidation of benzene in gas phase with Vanadium Pentaoxide (V2O5) catalyst inside fixed bed multitube reactor. The reaction occurs at 3500C-4000C and 20 atm condition. Reaction is highly exotermic, so it is important to keep the temperature value using dowtherm A as a cooler. Product is separated using absorber tower with dibutyl phthalate as a solvent. After that maleic anhydride as a product is purified in distillation column until the purity reaches 99.5%. This plant is designed at 28,000 ton per year capacity. Benzene�s requirements is 33,249.4224 ton/year while V2O5 is 36.2 ton/year. This plant is expected to be built in Cilacap, Central Java with 4 Ha area and 160 employees. Utilities component required by the plant are 637.412 kg/hour water from Serayu River, 8573.7 kW electricity and 11.106.142,75 litre per year. From economic evaluation calculation the value of fixed cost is US$ 23,796,908.25 + Rp 99,279,984,053.64 , manufacturing cost is US$ 41,593,587.10 + Rp 167,224,146,099.08 , working capital is US$ 8,107,837,386.62 + Rp 16,523,399.28 , general expense is US$ 54,590,914.06 + Rp 189,770,213,523.67 , profit before tax is Rp 74,911,559,892.86, profit after tax Rp. 37,455,779,946.43. ROI before tax 23.90 % , ROI after tax 11.95 %. POT before tax 2.95 years, POT after tax 4.56 years. BEP is 58.84 % of capacity, SDP is 30.27 % of capacity, dan DCF is 31.76 %. Based on economic evaluation above, maleic anhydride plant from benzene with 28.000 ton capacity per year is potential enough to be studied furthe