Isolation and Evaluation of Stearin and Olein Fractions from Rice Bran Oil Fatty Acid Distillate by Detergent Fractionation and Conversion into Neutral Glycerides by Autocatalytic Esterification Reaction

2019 ◽  
Vol 97 (3) ◽  
pp. 301-308
Author(s):  
Sudhasri Sahu ◽  
Minakshi Ghosh ◽  
Dipak K. Bhattacharyya
Keyword(s):  
Fatty Acid ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Esterification Reaction ◽  
Fatty Acid Distillate

scholarly journals Utilization of unsaponifiable matter from rice bran oil fatty acid distillate for preparing an antioxidant-rich oleogel and evaluation of its properties

2020 ◽  
Vol 71 (1) ◽  
pp. 336
Author(s):  
S. Sahu ◽  
M. Ghosh ◽  
D. K. Bhattacharyya
Keyword(s):  
Differential Scanning Calorimetry ◽  
Fatty Acid ◽  
Light Microscopy ◽  
Unsaponifiable Matter ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Polarized Light ◽  
Weight Basis ◽  
Scanning Calorimetry ◽  
Fatty Acid Distillate

Rice bran oil fatty acid distillate (RBOFAD) is an important by-product obtained from the physical refining process. This fatty acid distillate contains high a amount of Unsaponifiable Matter (γ-oryzanol 3.27 gm/100gm UM; total tocopherol 10.93 mg/100 g UM; total phytosterol 21.81 g/100g UM; squalene 1.15 g/100 g UM and total fatty alcohol 73.34 g/100 g UM) and free fatty acids. Antioxidant-rich Oleogels were obtained from rice bran wax (RBW), rice bran oil fatty acid distillate (RBOFAD) and refined rice bran oil. The main objective of this study was to utilize the antioxidant-rich unsaponifiable matter of RBOFAD (UMRBOFAD) as an organogelator along with rice bran wax, which also acts as a good organogelator. Antioxidant-rich oleogel was prepared using UMRBFAD, ethylcellulose (EC) and RBW at 2%, 2%, 3% on weight basis, respectively, in refined rice bran oil and this antioxidant-rich oleogel was compared with rice bran oil oleogel using RBW at 7% on weight basis of rice bran oil. These oleogels were evaluated using a combination of techniques such as differential scanning calorimetry (DSC), polarized light microscopy (PLM), Viscosity, synchrotron radiation X-ray diffraction (SR-XRD) and FTIR Spectroscopy. The differential scanning calorimetry (DSC) measured the thermal properties of rice bran oil oleogel and high antioxidant-rich oleogel. Polarized light microscopy images revealed needle-like crystals for RBW. SR-XRD measurements were used for clarification of the crystal structures of the building blocks of these oleogels. The antioxidant activities of oleogels were evaluated involving DPPH and ABTS assays.

scholarly journals NON-Catalytic and glycerol-free biodiesel production from rice bran oil fatty acid distillate in a microreactor

2021 ◽  
pp. 100096
Author(s):  
Nattee Akkarawatkhoosith ◽  
Tiprawee Tongtummachat ◽  
Amaraporn Kaewchada ◽  
Attasak Jaree
Keyword(s):  
Fatty Acid ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Biodiesel Production ◽  
Fatty Acid Distillate

scholarly journals Lipase Catalyzed Synthesis of Neutral Glycerides Rich in Micronutrients from Rice Bran Oil Fatty Acid Distillate

2008 ◽  
Vol 57 (11) ◽  
pp. 599-603 ◽  
Author(s):  
Sumit Nandi ◽  
Sarbani Gangopadhyay ◽  
Santinath Ghosh
Keyword(s):  
Fatty Acid ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Fatty Acid Distillate

scholarly journals Isolation of the unsaponifiable matter (squalene, phytosterols, tocopherols, γ-oryzanol and fatty alcohols) from a fatty acid distillate of rice bran oil

2018 ◽  
Vol 69 (3) ◽  
pp. 262 ◽  
Author(s):  
S. Sahu ◽  
M. Ghosh ◽  
D. K. Bhattacharyya
Keyword(s):  
Fatty Acid ◽  
Unsaponifiable Matter ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Physical Refining ◽  
Extraction Process ◽  
Fatty Alcohols ◽  
Hexane Extraction ◽  
The Individual ◽  
Fatty Acid Distillate

Rice bran oil is characterized by its unique composition of unsaponifiable matter such as oryzanol, squalene, sterols, tocopherols and fatty alcohols. Rice bran oil fatty acid distillate (RBOFAD) is an important by-product of physical refining plants. In the present study, an appropriate fractionation methodology is proposed for isolating the unsaponifiable matter into two fractions, squalene, phytosterols and fatty alcohols as fraction 1; tocopherols and γ- oryzanol as fraction 2. The two fractions together constitute the total unsaponifiable matter in the RBOFAD. The individual unsaponifiable matter components (γ-oryzanol 1.78g/100g, squalene 209.63 mg/100g, tocopherol 2.45mg/100g, total phytosterols 3.79g/100g and fatty alcohols 94.23g/100g) were isolated from RBOFAD by combining a chemical esterification process and liquid-liquid extraction process with 95% ethanol which extracted tocopherol, γ-oryzanol, sterols, squalene, FFA, monoglycerides; later with hexane extraction of the alkaline phase to remove squalene, sterols and fatty alcohols. The alkaline salts of tocopherols and γ-oryzanol are decomposed by the acidification and extraction of the unsaponifiable matter with n-hexane.

scholarly journals Continuous catalyst-free biodiesel synthesis from rice bran oil fatty acid distillate in a microreactor

2020 ◽  
Vol 6 ◽  
pp. 545-549
Author(s):  
Nattee Akkarawatkhoosith ◽  
Amaraporn Kaewchada ◽  
Attasak Jaree
Keyword(s):  
Fatty Acid ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Catalyst Free ◽  
Biodiesel Synthesis ◽  
Fatty Acid Distillate

scholarly journals PENGARUH KECEPATAN PENGADUKAN DAN SUHU REAKSI PADA ESTERIFIKASI MINYAK MENTAH DEDAK PADI BERKANDUNGAN ASAM LEMAK TINGGI

2019 ◽  
Vol 1 (3) ◽  
pp. 76
Author(s):  
Orchidea R. ◽  
Armanto Armanto ◽  
Lidia Yustianingsih ◽  
M. Rachimoellah
Keyword(s):  
Fatty Acid ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Fatty Acid Content ◽  
Acid Methyl Ester ◽  
High Fatty Acid ◽  
Biologically Active ◽  
Raw Material ◽  
Biodiesel Production ◽  
Esterification Reaction

Rice bran oil (RBO) derived from rice bran (RB) which could use as an alternative raw material for biodiesel production. Rice bran (dedak) are used as feed for poultry, pigs, and some dairy cattle because they are relatively cheap and do not require processing. The utilization of these oil further cheapen the cost of biodiesel and increased the economonic value of RB. The choice of RBO as a raw material for biodiesel due to the rice bran oil’s potentials. RBO is considered to be one of the most nutritious oils due to its favorable fatty acids composition and a unique combination of naturally occurring biologically active and antioxidant compounds (oryzanol, tocopherol, tocotrienol, phytosterol, polyphenol, dan squalene). The research emphazised on esterification reaction because of the rapid increase of FFA content in RBO after the milling of rice. Storage time of RB increased the FFA content. Mixing velocity dan time reaction was the other two variables which are affecting the esterification reaction. Those two variables are studied in this experiment.                 Experiment were designed to examine the mixing velocity and temperature reaction to the conversion of fatty acid methyl ester (FAME). Reaction condition 20:1 molar ratio methanol to FFA content and 5%-v/v catalyst (to the oil) was used in all experiments. Mixing velocity and time reaction was arranged as follows: 500, 750,  1000 rpm and 40, 50, 60oC, respectively. Research conducted in four parts: soxhlet extraction with n-hexane as a solvent; oil-solvent separation process; and the last step was esterification reaction. Reaction conducted on three neck round bottom flask equipped with magnetic stirrer, refluk condenser and thermometer. Crude product was separated first from unreacted methanol, glycerol, and catalyst prior to physical analyzed of biodiesel’s properties. Conversion of FAME was calculated from acid value difference, after and before reaction conducted.                 It was found that mixing velocity influenced the FAME conversion not significantly (specially in crude rice bran oil high fatty acid content esterification); increasing in temperature will increase the FAME conversion; kinetic reaction controlled by chemical reaction; and biodiesel product from this research already fullfill the requirements of Indonesian Standard of Biodiesel (FBI-SO1-03).

scholarly journals Enzymatic Degumming of Rice Bran Oil Using Different Commercial Phospholipases and Their Cocktails

Life ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1197
Author(s):  
Mayara S. Rodrigues ◽  
Rafaela M. Dos Passos ◽  
Paula V. de A. Pontes ◽  
Marcela C. Ferreira ◽  
Antonio J. A. Meirelles ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Vegetable Oil ◽  
Rice Bran ◽  
Phosphorus Content ◽  
Rice Bran Oil ◽  
Reaction Times ◽  
Oil Refining ◽  
Residual Phosphorus ◽  
Enzymatic Degumming

Rice bran oil is a highly nutritious vegetable oil, as it is rich in tocols and γ-oryzanol. Degumming is the first step in the vegetable oil refining process, and its main objective is the removal of phospholipids or gums. In the present study, enzymatic degumming trials were performed on crude rice bran oil using the phospholipases PLA1, Purifine® PLC, their mixture (PLA1/PLC), and a cocktail known as Purifine® 3G. Enzymatic degumming applying 50 mg/kg of PLA1 for 120 min resulted in a residual phosphorus content of 10.4 mg/kg and an absolute free fatty acid increase of 0.30%. Enzymatic degumming applying 300 mg/kg of Purifine® PLC for 120 min at 60 °C resulted in a residual phosphorus content of 67 mg/kg and an absolute diacylglycerol increase of 0.41%. The mixture of phospholipases and the cocktail presented approximately 5 mg/kg of residual phosphorus content after the reaction times. For all degumming processes, the preservation of minor components such as tocols and γ-oryzanol were observed. These results indicate that the use of enzyme mixtures or their cocktails to attain low phosphorus content and high diacylglycerol/free fatty acid conversion during enzymatic degumming is a viable alternative.

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