Synthesis of Waste Frying Oil and Trimethylolpropane Based Lubricant Basestocks


Synthesis of Waste Frying Oil and Trimethylolpropane Based Lubricant Basestocks


Norliza Julmohammad1,2*, Jumat Salimon3

1Faculty of Food Science & Nutrition, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah. 2,3School of Chemical Sciences & Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia.


American journal of chemical research-2d-code

Research on waste frying oil based lubricant base stocks production and trimethylolpropane (TMP) was investigated. Quality parameters were tested for the waste frying oil. The hydrolysis process was conducted to extract the free fatty acid from waste frying oil. TMP ester was produced via reaction between free fatty acids of waste frying oil and TMP at 130-140°C, for 5 hours with acid-catalyzed condition. Modification of TMP ester by epoxidation reaction followed by ring-opening reaction using a medium branch chain alcohol; 2-ethylhexanol. The TMP ester was reacted with hydrogen peroxide and formic acid at 45-55°C for 2½ hours during epoxidation process. Epoxidized TMP ester was reacted with 2-ethylhexanol in mol ratio of 1:2 to produce ether ester TMP. Concentrated sulphuric acid was used as a catalyst during ring opening and esterification processes. Ether ester TMP functional groups and chemical structure were identified using FTIR and NMR, respectively. Confirmation with FTIR has indicated sharp peak at 1742 cm-¹, proved the existence of ester group which confirmed the TMP ester formation during esterification and broad peak of 3456 cm-1 during ring opening indicated the formation of ether ester TMP. In ¹H NMR analysis, the signal of methylene proton in which the carbon attached to ether esters TMP existed at 4.0-4.1 ppm and for 13C NMR, the carbonyl ester signals existed in the range of 174.1 ppm. Several analyses were conducted on the ether ester TMP base stock such as hydroxyl value, viscosity value, pour point and flash point. It showed good low temperature behaviour with pour point at -40ºC and high thermal stability, flash point value exceeding 250ºC and viscosity value of 75 cP. The ether ester TMP produced is comparable with a commercial biolubricant in the market respectively.


Keywords: Waste Frying Oil, Trimethylolpropane, Epoxidation, Esterification, Biolubricant.

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How to cite this article:
Norliza Julmohammad, Jumat Salimon.Synthesis of Waste Frying Oil and Trimethylolpropane Based Lubricant Basestocks. American Journal of Chemical Research, 2019, 3:13. DOI: 10.28933/ajcr-2019-07-1506


References:

1. Aluyor EO, Obahiagbon KO, Ori-jesu M. (2009) Biodegradation of Vegetable Oils: A Review. Academic Journals: Scientific Research and Essay, 4(6): 543-548.
2. Ghazali Z, Wan Nik WB, Ku Bulat KH, Ani FN, Xian LF. (2006) Proceedings of the 1st International Conference on Natural Resources Engineering & Technology, Putrajaya, Malaysia. pp. 631-637.
3. Jese Sihombing. (2000) Analisis Komposisi Asam Lemak Minyak Daging Buah Kemiri yang diperoleh dengan Cara Ekstraksi Kontiniu, Sumatera Utara Medan.
4. Jumat S, Nadia S. (2009) Improved Low Temperature Properties of 2-Ethylhexyl-9(10)-Hydrox-10(9)-Acyloxystearate Derivatives. European Journal of Scientific Research, 31(4): 583-591.
5. Malaysian Palm Oil Board. (2007) Application Number PI 2007 0797. Process to Produce Polyols, 22 May 2007.
6. Mamot S. (2004) STKO 2122 SEBATIAN OLEOKIMIA (Oleochemicals), Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia.
7. Moser BR, Sharma BK, Doll KM, Erhan SZ. (2007) Diesters from Oleic Acid: Synthesis, Low Temperatures
8. Properties, and Oxidation Stability. Journal of American Oil Chemists Society, 84: 675-680.
9. Mungroo R, Pradhan NC, Goud VV, Dalai AK. (2008) Epoxidation of Canola Oil with Hydrogen Peroxide Catalyzed by Acidic Ion Exchange Resin. Journal Of American Oil Chemistry Society, 85: 887–896.
10. Pavia DL, Lampman GM, Kriz GS. (2009) Introduction to Spectroscopy, 4th Ed., United States: Thomson Learning, Inc.
11. Robiah Y, Razi AF, Ooi TL, Iyukie SE, Idris A. (2003) Development of optimum synthesis method for transesterification of palm oil methyl esters and trimethylolpropane to environmentally acceptable palm oil-based lubricant. Journal of Oil Palm Research, 15 (2): 35-41.