Optimization of low-temperature methanol crystallization for unsaturated fatty acids separation from crude palm fatty acids mixture using response surface methodology

Murad Bahadi, Mohd Firdaus Mohd Yusoff, Jumat Salimon, Abd Al-Wali Japir, Darfizzi Derawi

Research output: Contribution to journalArticle

Abstract

This current work studies the separation of unsaturated fatty acids from crude palm fatty acids mixture by methanol crystallization. Separation conditions of unsaturated fatty acid were optimized through the adoption of the response surface method and the optimal model was developed. The percentages of unsaturated fatty acids recovered under the optimal condition were higher than 95 ± 0.3 % with the yield of product percentage 55.2 ± 0.8 %. The optimized condition comprised of three essential aspects methanol-to-fatty acids ratio of 15:1 (mL:g), crystallization temperature of −15 ºC and crystallization time of 20.8 h, respectively. The unsaturated fatty acids composition isolated from crude palm fatty acids mixture consisted of 76.3 % oleic acid (C18:1), 18.3 % linoleic acid (18:2) and 0.2 % linolenic acid (C18:3). Only 4.9 ± 0.3 % of saturated fatty acids was discovered in the product. The iodine value of separated unsaturated fatty acids had increased from 54.0 ± 0.1 mg/g to 94.4 ± 0.2 mg/g. The results have demonstrated that low-temperature methanol crystallization is very active, low cost, stable and obtainable, and comparatively ease to recover for the separation of unsaturated fatty acids from an oil mixture of fatty acids.

Original languageEnglish
Pages (from-to)1617-1625
Number of pages9
JournalAsian Journal of Chemistry
Volume31
Issue number7
DOIs
Publication statusPublished - 1 Jan 2019

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Crystallization
Unsaturated Fatty Acids
Methanol
Fatty Acids
Temperature
alpha-Linolenic Acid
Linoleic Acid
Oleic Acid
Iodine
Oils
Chemical analysis
Costs

Keywords

  • Crude palm oil
  • D-optimal Design
  • Methanol crystallization
  • Unsaturated fatty acids

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "Optimization of low-temperature methanol crystallization for unsaturated fatty acids separation from crude palm fatty acids mixture using response surface methodology",
abstract = "This current work studies the separation of unsaturated fatty acids from crude palm fatty acids mixture by methanol crystallization. Separation conditions of unsaturated fatty acid were optimized through the adoption of the response surface method and the optimal model was developed. The percentages of unsaturated fatty acids recovered under the optimal condition were higher than 95 ± 0.3 {\%} with the yield of product percentage 55.2 ± 0.8 {\%}. The optimized condition comprised of three essential aspects methanol-to-fatty acids ratio of 15:1 (mL:g), crystallization temperature of −15 ºC and crystallization time of 20.8 h, respectively. The unsaturated fatty acids composition isolated from crude palm fatty acids mixture consisted of 76.3 {\%} oleic acid (C18:1), 18.3 {\%} linoleic acid (18:2) and 0.2 {\%} linolenic acid (C18:3). Only 4.9 ± 0.3 {\%} of saturated fatty acids was discovered in the product. The iodine value of separated unsaturated fatty acids had increased from 54.0 ± 0.1 mg/g to 94.4 ± 0.2 mg/g. The results have demonstrated that low-temperature methanol crystallization is very active, low cost, stable and obtainable, and comparatively ease to recover for the separation of unsaturated fatty acids from an oil mixture of fatty acids.",
keywords = "Crude palm oil, D-optimal Design, Methanol crystallization, Unsaturated fatty acids",
author = "Murad Bahadi and {Mohd Yusoff}, {Mohd Firdaus} and Jumat Salimon and {Al-Wali Japir}, Abd and Darfizzi Derawi",
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AU - Mohd Yusoff, Mohd Firdaus

AU - Salimon, Jumat

AU - Al-Wali Japir, Abd

AU - Derawi, Darfizzi

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AB - This current work studies the separation of unsaturated fatty acids from crude palm fatty acids mixture by methanol crystallization. Separation conditions of unsaturated fatty acid were optimized through the adoption of the response surface method and the optimal model was developed. The percentages of unsaturated fatty acids recovered under the optimal condition were higher than 95 ± 0.3 % with the yield of product percentage 55.2 ± 0.8 %. The optimized condition comprised of three essential aspects methanol-to-fatty acids ratio of 15:1 (mL:g), crystallization temperature of −15 ºC and crystallization time of 20.8 h, respectively. The unsaturated fatty acids composition isolated from crude palm fatty acids mixture consisted of 76.3 % oleic acid (C18:1), 18.3 % linoleic acid (18:2) and 0.2 % linolenic acid (C18:3). Only 4.9 ± 0.3 % of saturated fatty acids was discovered in the product. The iodine value of separated unsaturated fatty acids had increased from 54.0 ± 0.1 mg/g to 94.4 ± 0.2 mg/g. The results have demonstrated that low-temperature methanol crystallization is very active, low cost, stable and obtainable, and comparatively ease to recover for the separation of unsaturated fatty acids from an oil mixture of fatty acids.

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