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Usefulness of oxalic acid among other ingredients mixing dye in textiles and paint, neutralizing the excess alkali leaching and as bleaching, the need is still imported from abroad. Preparation of oxalic acid using water hyacinth raw materials is done by melting gas chromatography alkali cellulose process. The raw material in this case the water hyacinth is melted by using 50% NaOH solution at a temperature of 200 oC. From this melting process to form 50% of salt is then formed oxalic acid and the remainder as a carbonate salt. Purification of these results gas chromatography is washed with hot water, then cooled and concentrated solution that will eventually form the sodium oxalate. By reacting gas chromatography Ca (OH) 2 with sodium oxalate will be obtained calcium oxalate and sodium hydroxide. Calcium oxalate formed is reacted with sulfuric acid to obtain oxalic acid and calcium sulfate. The production capacity of the plant is designed gas chromatography 50,000 tons / year, requiring water hyacinth as raw materials 114,734.156 tons / year and 50% sodium hydroxide at 172101.2325 gas chromatography tons / year. Utilities such as water 580.50 thousand m3 / year obtained from creeks, power 181.3 kW obtained from the National Electricity gas chromatography Company and type of diesel fuel oil at 5.577 m3 / year. Factory established in the district planned Tondano North Sulawesi. The form of the company is a Limited Liability Company (PT) with a system of lines and staff, requiring a workforce of 172 people gas chromatography based on the needs of the company's gas chromatography management and production units that exist in the plant based on the volume of work. Based on the calculation of the economic evaluation for the establishment of oxalic acid plant is required total capital investment of Rp. 728 519 465 952 consisting of a fixed capital of Rp. And Working Capital 123 848 309 212 Rp. 109 277 919 893. Capital investment in plant consists of 40% equity and 60% equity loan from Bank Syariah Mandiri nisba loan with 15% per year. Manufacturing cost Rp. Rp 6,610,377,165,841 and general expenses. 734 486 351 760. Selling price of Rp. 7,612,094,635,200 per year, with a profit before and after tax of Rp. 267 231 117 599 per year and Rp. 173 700 226 439 per year. Profitability includes Rate of Investment (ROI) before gas chromatography and after tax of 36.68% and 23.84%, Pay Out Time (POT) before and after tax of 1.9 years and 2.6 years and Break Event Point (BEP) is 47.78%, Shut Down Point (SDP) of 33.69% and Interest Rate of Return (IRR) of 26.69%. More please download here
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