Deacidification of crude rice bran oil (Crbo) to remove ffa and preserve γ-oryzanol using deep eutectic solvents (des)

Siti Zullaikah*, Nizar Dwi Wibowo, I. Made Gede Eris Dwi Wahyudi, M. Rachimoellah

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Citations (Scopus)

Abstract

High content of free fatty acids (FFA) in crude rice bran oil (CRBO) needs to be separated through deacidification. Generally, deacidification process that is widely used are chemical and physical processes which causes the loss of bioactive compounds (γ-oryzanol) and un-environmentally friendly. The liquid-liquid extraction (LLE) using deep eutectic solvents (DES) to remove FFA and preserve γ-oryzanol would be implemented in this study. DES with different hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA) with certain molar ratio such as Choline Chloride (ChCl)-Ethylene glycol 1:2 (DES I), ChCl-Glycerol 1:1 (DES II), ChCl-Urea 1:2 (DES III), ChCl-Oxalic acid 1:2 (DES IV), and Betaine Monohydrate-Glycerol 1:8 (NADES) were used as solvent to extract FFA from dewaxed/degummed RBO (DDRBO) for certain extraction time (30, 60, 120, 180, and 240 min) and extraction temperature (30°C, 40°C, 50°C, 60°C, and 70°C) under stirring (200 rpm). Deacidification using DES I for 240 min. and temperature of 50oC was the optimum solvent to remove FFA (19.03 ± 2.33 %) and preserve γ-oryzanol (recovery of γ-oryzanol was 51.30 ± 1.77 %). The results also revealed that the longer time of extraction would be increased removal of FFA and decreased recovery of γ-oryzanol. The higher temperature of extraction would be increased removal of FFA. In this work, temperature of 50oC was the best extraction temperature of FFA since DES has highest solubility at this temperature.

Original languageEnglish
Title of host publicationSeminar on Materials Science and Technology
EditorsLukman Noerochim
PublisherTrans Tech Publications Ltd
Pages109-114
Number of pages6
ISBN (Print)9783035714340
DOIs
Publication statusPublished - 2019
Event4th International Seminar on Science and Technology, ISST 2018 - Surabaya, Indonesia
Duration: 9 Aug 20189 Aug 2018

Publication series

NameMaterials Science Forum
Volume964 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference4th International Seminar on Science and Technology, ISST 2018
Country/TerritoryIndonesia
CitySurabaya
Period9/08/189/08/18

Keywords

  • Crude rice bran oil
  • Deacidification
  • Deep eutectic solvents
  • Free fatty acids (FFA)

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