Butane extraction of model organic pollutants from water

Yang, Chun

doi:10.1016/j.jhazmat.2003.12.007

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Accordingly, there has been a great interest in the use of pressurized gases or highly volatile nonpolar solvents, as an alternative to the conventional solvents used. When gases at ambient conditions such as propane and nbutane are liquefied, its physicochemical properties become adequate for extraction purposes, and are considered non-toxic solvents (Yang et al 2004). Another advantage is the complete removal of the solvent after the extraction by reducing pressure, resulting in solvent-free oil (Tres et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Fatty acid profile of pecan nut oils obtained from pressurized n-butane and cold pressing compared with commercial oils

et al. 2017

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This short note compares the chemical profile of pecan nut oil samples obtained from pressurized -butane and cold pressing with two commercial oils. The conventional cold pressing technique yielded 58.9 wt%, while pressurized-butane yielded from 53 to 65 wt%, being the highest yield at 55 °C, and pressure of 40 bar. The -butane behaves nearly like a piston fluid within the experimental conditions used. The results showed that the extraction variables had a slight influence on the fatty acid composition of the samples. Extraction with-butane thus showed to be a promising alternative technique to conventional extraction methods, as very mild operating conditions and eco-friendly solvent can be used to provide good results without any residues in the final product.

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Section: Introductionmentioning

confidence: 99%

Fatty acid profile of pecan nut oils obtained from pressurized n-butane and cold pressing compared with commercial oils

et al. 2017

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“…T he partition coeffi cients of butane extraction of organic nonelectrolytes from aqueous solution have recently been obtained (Teo et al, 2002), and useful equations have been reported that correlate the partition coeffi cients, as log Pbut, with aqueous solubilities, as log Sw with Sw in units of mmol/L or mg/L: (2), it is then possible to determine removal effi ciencies for organic nonelectrolytes from water by extraction with butane (Teo et al, 2000;Yang et al, 2004). One major diffi culty in using these equations to predict butane/water partition coeffi cient, is the requirement of determined solubilities in water.…”

Section: Randd Notementioning

confidence: 99%

The Correlation and Prediction of Butane/Water and Gas/Butane Partition Coefficients

Abraham

Acree

2008

Can. J. Chem. Eng.

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It has been pointed out previously that the butane/water partition coefficient is a key parameter in the determination of extraction affinity. We have taken 43 such partition coefficients and have obtained a very satisfactory correlation with Abraham solvation parameters. Similarly, we have obtained a good correlation of 43 gas/butane partition coefficients. These correlations are general, and can be used to predict further values of the butane/water and gas/butane partition coefficient.

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“…The extraction efficiency of organic eluents is a function of the polarity of the molecules to be extracted, which correlates directly to the dielectric constant and the polarity of the extraction medium. n-Butane (nB) and dimethyl ether (DME) are two organic eluents that display different polarities, and their use is proposed as a valid alternative for n-hexane [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Comparison of extraction methods for active biomolecules using sub-critical dimethyl ether and n-butane

Ciulla

Canale

Wolicki

et al. 2022

Eur Food Res Technol

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Several extraction methods are used to isolate natural compounds, and recent approaches utilize subcritical or supercritical extraction media. In this paper we compare extraction methods based on subcritical eluents, dimethyl ether (sC-DME) and n-butane (sC-nB), under mild conditions, using coffee beans and powder as an exemplary raw material. The parameters to be controlled to improve the extraction are considered, and the resulting data discussed. The results obtained display higher selectivity of sC-DME for caffeine (1.9%w/w sC-DME vs. 1.7%w/w sC-nB, on dry extract) and a good yield (0.479 mg/g of caffeine from green coffee beans) compared to, e.g., supercritical carbon dioxide (SC-CO2), which shows 0.32 mg/g of caffeine at higher pressure and temperature (25 MPa, 40 °C). We also discuss some technical implementations for optimizing the use of sub-critical eluents through proper combinations of pressure and temperature. We show that extraction processes based on sub-critical eluents are easy to operate and efficient, and can be easily automated.

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Butane extraction of model organic pollutants from water

Cited by 9 publications

References 4 publications

Fatty acid profile of pecan nut oils obtained from pressurized n-butane and cold pressing compared with commercial oils

Fatty acid profile of pecan nut oils obtained from pressurized n-butane and cold pressing compared with commercial oils

The Correlation and Prediction of Butane/Water and Gas/Butane Partition Coefficients

Comparison of extraction methods for active biomolecules using sub-critical dimethyl ether and n-butane

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