PROCESS FOR PREPARING A FUEL FOR DIESEL ENGINES

摘要

The invention relates to a process for preparing a Diesel bio-fuel. According to the invention, the process consists in extracting oil with hexane from algae as powder, at a temperature of 70...75°C, for 6...8 h, after which methanol containing 5...10% sulphuric acid is admixed to the algae oil dissolved in hexane and the resulting mixture is thermostated at 50...55°C for 1...2 h and further treated with a solution of sodium methoxide in methanol, in a concentration of 20...25%, at a pH value of 10...13, then it is thermostated at 50...55°C for 1...2 h, the phases are separated and the upper layer containing the methyl esters of fatty acids of algae is purified by distillation-washing-drying to result in a fuel having a minimal methyl ester content of 97%.