The study is about the recovery and purification of glycerine as a by-product from coconut methyl ester production in the Philippines. The aqueous layer produced from settling or phase splitting of the methyl ester after the transesterification process was subjected to various treatments like acidification, neutralization, concentration in vacuo in order to get back the crude glycerine. The crude glycerine obtained from the laboratory and scale-up process conformed with the specification set by the British standard for crude glycerine. The recovered glycerine is composed of: 84.92%, glycerine; 8.03%, ash; 4.72%, H20; 2.32%, MONG. Further distillation yielded a refined glycerine that meets with the specification set by USP. The average glycerine content of refined glycerine is 96.86%; ash, 0.06%; water, 1.10%, refractive index @ 20°C, 1.4696, specific gravity at 25°C, 1.296 g.
[AOCS] American Oil Chemists Society, Firestone D. 1989. Official methods and recommended practices of the American Oil Chemists’ Society. 4th edition. Champaign: American Oil Chemists’ Society.
Garti N, Aserin A, Zaidman B. 1981. Polyglycerol esters: optimization and techno-economic evaluation. J Amer Oil Chem Soc. 58(9):878–883. doi:10.1007/BF02672963.
Gunstone F, Heming M. 2004. Glycerol-an important product of the oleochemical industry. Lipid Technol. 16(8):177–179.
Hedtke D. 1996. Glycerine processing. In: Hui YH, editor. Industrial oil and fat products. 5th edition. New York: John Wiley & Sons. p. 275–308.
Helmold VP. 1993. Sodium sulfate. In: Barbara E, editor. Ullmann’s encyclopedia of industrial chemistry. 5th edition. Weinheim: VCH Verlagsgesellschaft. p. 355–368.
Jeromin L, Gutsche B, Bunte R, Jordan V, inventors; Cognis Deutschland GmbH and Co KG, assignee. 1998 Jan 20. Process for the production of diglycerol. United States patent US 5,710,350.
Jungermann E. 1991. Chemical reactions of glycerine. In: Jungermann E, Sonntag NOV, editors. Glycerine, a key cosmetic ingredient. New York: Marcel Dekker. p. 97–112.
Matsushita K, Naribayashi I, Okuda S. 1990 Jun 29. Production of high-purity diglycerol. Japan patent JPH 02169536 A.
Ooi TL, Yong KC, Dzulkefly K, Wan Yunus WMZ, Hazimah AH. 2001. Crude glycerine recovery from glycerol residue waste from a palm kernel oil methyl ester plant. J. Oil Palm Res. 13:16–22.
Purdy E, Corpuz PG. 2019. Philippines biofuels annual: Philippine biofuel industry outlook. Technical report. United States Department of Agriculture Foreign Agricultural Service. Manila.
Quispe CA, Coronado CJ, Carvalho JA. 2013. Glycerol: production, consumption, prices, characterization and new trends in combustion. Renewable Sustainable Energy Rev. 27:475–493. doi:10.1016/j.rser.2013.06.017.
Sinaga MS, Ramadhan MR, Rico G, Sitompul WG. 2019. Effect of acidification mole ratio and solvent volume ratio of glycerol purification. IOP Conf Ser: Mater Sci Eng. 505(1):1–5. doi:10.1088/1757-899X/505/1/012116.
Thomas FC. 1983. Sodium sulfate. In: Encyclopedia of chemical technology. 3rd edition. New York: John Wiley & Sons. p. 245–256.
[USPC] United States Pharmacopeial Convention. 2009. Glycerin. Revision Bulletin. https://www.uspnf.com/sites/default/files/usp_pdf/EN/USPNF/revisions/2009-01-30glycerinmonograph.pdf.
Yong KC, Ooi TL, Dzulkefly K, Wanyunus WMZ, Hazimah aH. 2001. Characterization of glycerol residue from a palm kernel oil methyl ester plant. J. Oil Palm Res. 13(2):1–6.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Copyright (c) 2020 The Author(s)