Decolorization of vegetable oils by membrane processing

Reddy, K. Kondal; Subramanian, R.; Kawakatsu, Takahiro; Nakajima, Mitsutoshi

doi:10.1007/s002170100353

Cited by 38 publications

(30 citation statements)

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“…Membrane can be used in degumming process (Subramanian et al, 1999, Alicieo et al, 2002, Hafidi et al, 2005, Ribiero et al, 2008. Other studies also evaluate about membrane flux behavior of several vegetable oils (Manjula et al, 2011, Alicieo et al, 2002, deacidification (Firman et al, 2013), decolorization (Reddy, 2001), and pigment concentration from the oil .…”

Section: Introductionmentioning

confidence: 99%

Non-Dissolved Solids Removal During Palm Kernel Oil Ultrafiltration

Purwasasmita

Juwono

Karlina

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Non-Dissolved Solids Removal During Palm Kernel Oil Ultrafiltration

Purwasasmita

Juwono

Karlina

et al. 2014

REAKTOR

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“…Zhang et al (13) screened 36 laboratory-made UF membranes for refining vegetable oils without added solvent, and one of the membranes achieved 93% separation of phospholipids. Kondal Reddy et al (14) reported that nonporous membranes were effective in reducing color compounds in undiluted oils as well as in hexane-oil miscella.…”

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confidence: 98%

Processing vegetable oils using nonporous denser polymeric composite membranes

Subramanian

Nakajima

Raghavarao

et al. 2004

J Americ Oil Chem Soc

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Membrane processing offers several advantages over conventional processes for edible oil refining. In recent years, processing solvent-extracted, screw-pressed, and used frying oils using nonporous denser polymeric composite membranes without pretreatment and addition of chemicals has been extensively investigated. In the present review, results obtained with real and model systems have been summarized and a comprehensive explanation is provided on the mechanism of rejection and differential permeation of oil constituents. Phospholipid-TG and pigment-TG systems are construed as conventional solute-solvent systems, and tocopherol-TG and FFA-TG systems are treated as liquid mixtures exhibiting differential permeability.Dense membrane theory appears more applicable than the reverse osmosis theory in qualitatively explaining the differential permeability of liquid constituents of the oil. Membrane processing of oils appears to have the potential to be a one-step process, especially for screw-pressed oils, in producing a premium-quality product. However, the development of suitable membranes that enable higher fluxes is necessary for industrial adoption of this technology.

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“…Our earlier studies on processing hexane-oil miscella also showed that there is no selectivity between oil and hexane over a wide range of oil concentration in the miscella [15,16]. Accordingly, in the present batch system the maximum removal of oil from the feed would be proportional to the amount of permeation.…”

Section: Efficacy Of Nonporous Membrane For Deoiling Lecithinmentioning

confidence: 92%

Laboratory Studies on Membrane Deoiling of Lecithin

Manjula

Subramanian

2008

J Americ Oil Chem Soc

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Deoiling of lecithin using a nonporous membrane was examined in a favorable solvent (hexane) medium with soy and rice bran lecithins. During the membrane process, the acetone insoluble (AI) content of soy lecithin increased from 63.2 to 81.0% in a single step batch operation. The membrane exhibited an excellent selectivity since phospholipid (PL) reverse micelles formed in the system were rejected almost completely due to low solubility probably aided synergistically by size exclusion. Diafiltration achieved greater oil removal from lecithin as reflected in terms of higher AI and PL contents in the deoiled lecithin. In discontinuous diafiltration, the PL content increased from 33.3 to 85.5% in rice bran lecithin (150% dilution to feed) and 56.6 to 85.7% in soy lecithin (200% dilution), respectively. The simulated continuous diafiltration run showed slightly greater PL content in soy lecithin (91.3%) compared to discontinuous diafiltration (89.7%) besides offering higher productivity. The membrane showed a color reduction of *60% in soy lecithin but there was no improvement in rice bran lecithin due to the retention of degradation products. The proposed integrated membrane process with nonporous (deoiling) and nanofiltration (solvent recovery) membranes could be an attractive preposition besides being an acetone free process.

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Decolorization of vegetable oils by membrane processing

Cited by 38 publications

References 1 publication

Non-Dissolved Solids Removal During Palm Kernel Oil Ultrafiltration

Non-Dissolved Solids Removal During Palm Kernel Oil Ultrafiltration

Processing vegetable oils using nonporous denser polymeric composite membranes

Laboratory Studies on Membrane Deoiling of Lecithin

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