Electronic Theses and Dissertation

Propilen glikol merupakan salah satu produk industri kimia yang digunakan secara meluas dalam produksi resin polyester unsaturated, fluida anti beku serta bahan baku dalam industri farmasi, kosmetik, pembersih pakaian, dan pengawet makanan. Untuk memenuhi kebutuhan industri di Indonesia, maka dilakukan prarancangan pabrik propilen glikol melalui proses hidrasi propilen oksida dengan kapasitas 20.000 ton/tahun di Kota Dumai, Provinsi Riau. Pabrik ini direncanakan beroperasi selama 330 hari dalam satu tahun dengan
jumlah pekerja 133 orang dan akan mulai beroperasi pada tahun 2028. Propilen glikol dibuat dengan reaksi hidrasi propilen oksida dalam reaktor berpengaduk untuk menghasilkan propilen glikol sebagai produk utama dan dipropilen glikol sebagai produk samping. Bahan baku yang diperlukan adalah propilen oksida sebesar sebesar 3.334,35 kg/jam dan air sebesar 7.636,82 kg/jam dengan kondisi operasi reaktor pada suhu 85°C dan
tekanan 21 atm. Produk yang dihasilkan dari reaktor kemudian akan dimurnikan di multiple effect evaporator dan kolom distilasi. Kebutuhan utilitas air sebesar 29.657,88 kg/jam, kebutuhan listrik sebesar 400 kW, dan bahan bakar solar untuk boiler sebesar 2.621,87 kg/jam. Diperoleh analisa ekonomi dari pabrik ini:
Fixed Capital Investment (FCI) = Rp. 661.880.275.622
Working Capital Investment (WCI) = Rp. 116.802.401.580
Total Capital Investment (TCI) = Rp. 778.682.677.203
Total Production Cost (TPC) = Rp. 861.399.216.144
Selling Cost (SC) = Rp. 1.077.887.735.095
Laba Bersih = Rp. 162.366.389.213
PBP = 4,68 tahun
Break Event Point (BEP) = 39,20 %
Internal Rate of Return (IRR) = 18,90%
Return on Investment (ROI) = 20,85%
Berdasarkan hasil analisa eknomi tersebut, dapat disimpulkan bahwa pabrik propilen glikol
dengan kapasitas 20.000 ton/tahun layak untuk dilanjutkan ke tahap desain estimasi
terperinci.

Propylene glycol is one of the chemical industry products widely used in the production of unsaturated polyester resins, antifreeze fluids, as well as raw material in the pharmaceutical, cosmetic, laundry detergent, and food preservative industries. To meet the industrial needs in Indonesia, a preliminary design for a propylene glycol plant is carried out through the hydration of propylene oxide with a capacity of 20,000 tons per year in Dumai City, Riau Province. This plant is planned to operate for 330 days annually with total worker of 133 people and scheduled to begin its operations in the year 2028. Propylene glycol is produced by the hydration of propylene oxide in an agitated reactor to produce propylene glycol as the main product and dipropylene glycol as byproduct. The required raw materials are 2,363.43 kg/hour of propylene oxide and 5,467.75 kg/hour of water under operating conditions in reactor at 85°C and 21 atm pressure. The products from the reactor will then be purified in a multiple-effect evaporator and distillation column. The utility requirements are 29.657,88 kg/hour of water, 400 kW of electricity, and 2,621.87 kg/hour of diesel fuel for the boiler. An economic analysis for this plant results in: Fixed Capital Investment (FCI) = Rp. 661.880.275.622 Working Capital Investment (WCI) = Rp. 116.802.401.580 Total Capital Investment (TCI) = Rp. 778.682.677.203 Total Production Cost (TPC) = Rp. 861.399.216.144 Selling Cost (SC) = Rp. 1.077.887.735.095 Net Profit = Rp. 162.366.389.213 Pay Out Time (POT) = 4.68 years Break Event Point (BEP) = 39,20 % Internal Rate of Return (IRR) = 18,90% Return on Investment (ROI) = 20,85% Based on the economic analysis results, it can be concluded that the propylene glycol plant with a capacity of 20,000 tons per year is feasible to be continued to detailed-estimate design.