Purification of Methyl Ricinoleate on Producing of Cetane Improver

3rd International Conference on Mathematics, Science and Education 2016

数学;自然科学;教育

Abdullah^1 ; Triyono^2 ; Trisunaryanti, W.^2 ; Haryadi, W.^2

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat, Banjarbaru, Indonesia^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia^2

关键词: Acetic anhydrides;    Fractional distillation;    FT-IR spectrum;    FTIR analysis;    Methyl esters;    Methyl ricinoleate;    Nitrate groups;    Reduced pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/824/1/012018/pdf
DOI  :  10.1088/1742-6596/824/1/012018

来源: IOP

【 摘 要 】

Purification of methyl ricinoleate on a mixture of methyl ester that was derived from castor oil has been conducted. Methyl ricinoleate with high purity is required in the manufacture of additives for improving the cetane number of diesel oil. Purification of methyl ricinoleate was performed by fractional distillation under reduced pressure at 4.5 mmHg. In order to produce of cetane improver, methyl ricinoleate was nitrated with a mixture of HNO3and acetic anhydride at 11-13°C for 4 hours. Based on the analysis using gas chromatography (GC) was known that purity of methyl ricinoleate can be increased from 87.2% to 99.5%, with a yield of 30.6% (v/v). FTIR analysis showedthe absorption spectrum at 3440 (1 /cm), which is derived from the vibrations of the -OH (hydroxyl) on the ricinoleate methyl molecules. The results of characterization showed an increase in density of 0.9161 (mg/L) to 0.9171 (mg /L) and the refractive index of 1.4619 to 1.4627. FTIR spectra of nitrated methyl ricinoleateshowedan absorption spectrum at 1627 (1/cm), in which indicates a new compound with nitrate group (-NO3).