Fractional extraction of rice-bran oil and its esters with supercritical carbon dioxide

Journal Article · Thu Apr 01 04:00:00 EST 1993 · International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States)

OSTI ID:6056450

Saito, Norio; Ikushima, Yutaka; Hatakeda, Kiyotaka; Ito, Shota; Asano, Takashi; Goto, Tomio ^[1]

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1. Government Industrial Research Inst., Sendai (Japan)

The fractional extraction of rice-bran oil and its esters with supercritical carbon dioxide was studied at 313-373 K and 8.2-19.8 MPa, using an entrainer or a separation column. A column was effective for fractionating the fatty acids in the extracted rice-bran oil, while an entrainer enhanced the extraction efficiency of the rice-bran oil. No significant difference existed in the fatty acid composition of the oils extracted with supercritical CO[sub 2] alone and supercritical CO[sub 2] containing an entrainer. The degree of fractionation of the fatty acid esters from rice-bran oil increased with the temperature in the column. At 343 K, the proportion of palmitate in the extracts reached a maximum of 86% in the early fractions, but oleate and linoleate were not fractionated. The use of a column packed with silica gel-supported silver nitrate was extremely effective for fractionating fatty acid esters. Palmitate and oleate, which constituted 94% and 91% of the fatty acid esters in the initial rice-bran oil esters, were recovered in 91% and 81% purity, respectively, but the degree of recovery and the purity were both lower with linoleate than with oleate.

• OSTI ID: 6056450
• Journal Information: International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States), Journal Name: International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States) Vol. 33:2; ISSN INCEAX; ISSN 0020-6318
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ADSORBENTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CEREALS
CHALCOGENIDES
ESTERS
EXTRACTION
EXTRACTION APPARATUSES
EXTRACTION COLUMNS
FRACTIONATION
GRAMINEAE
LILIOPSIDA
MAGNOLIOPHYTA
MANAGEMENT
MATERIALS RECOVERY
MEDIUM PRESSURE
NITRATES
NITROGEN COMPOUNDS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
PROCESSING
RICE
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SILICA GEL
SILVER COMPOUNDS
SILVER NITRATES
SOLVENT EXTRACTION
SUPERCRITICAL GAS EXTRACTION
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS
VEGETABLE OILS
WASTE MANAGEMENT
WASTE PROCESSING