PRARANCANGAN PABRIK ASAM TEREPHTALAT DARI P-XYLENE KAPASITAS 50.000 TON/TAHUN

This terephtalic acid plant was designed with a capacity of 50,000 tons per year. Terephtalic acid is produced using p-xylene as raw material by oxidation with air and planned to operate continuously for 330 days a year. The plant will be completely built in 2014. Terephtalic acid plant consists of three main processes, namely preparation, synthesis, and purification products. The temperature and pressure of raw material is prepared, based on reactor�s operating conditions. In the reactor, raw materials react with air to produce terephtalic acid, with cobalt acetate as catalyst and acetic acid as solvent. The products from reactor, go into crystallizer to obtain more products that still dissolved in liquid. Then, products go into purification units to conform the specification of the desired products. To produce terephtalic acid with 99% purity as much as 50,000 tons/year, needs 33,222 tons/year of p-xylene and 138.895 tons/year of air. Acetic acid as solvent is needed as much as 4,343 tons/year. Cobalt acetate as catalys is needed as much as 455 tons/year. Utilities which are needed include 300,697.65 tons year of treated water, 7,582.62 m 3 /year of No. 4 fuel oil, 121,116 tons/year of steam, 396,000 m 3 of compressed air, and electricity generated at 2,490 kW. The plant is planned to be established in the area of Cilacap, Central Java on the land area of 100,000 m 2 including the mess for employees and plans of regional expansion process. Employees are needed as much as 153 people. Based on the criteria, the plant is considered low risk. The fixed capital for the plant is as much as $ 10,356,465 + Rp 102,559,520,921 and the working capital as much as Rp 150,101,970,079. While the total production cost is as much as Rp 539,147,555,977. The profit before annual tax is Rp 56,602,944,023 and the profit after tax is Rp 28,301,472,011. The results of the economic analysis showed that the Return on Investment (ROI) before tax is 27.90