Minimizing entrainment of extract liquid by settling maize particles

Dickey, Leland C.; McAloon, Andrew J.; Parris, Nicholas

doi:10.1016/s0926-6690(03)00035-9

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Dickey et al also discussed the maize‐based zein extraction process carefully and showed that the cost of evaporating the solvent from maize residues was significant in capital and energy, hence an economically feasible method, called ‘liquid/liquid miscible displacement’, was used instead to thoroughly recover the alcoholic extract from the maize residues. However, this method may not be suitable for DDGS, because unlike the maize, DDGS was the down‐steam product of the dry grind ethanol process.…”

Section: Resultsmentioning

confidence: 99%

Recovering high value-added substances from corn distillers dried grains with solubles: a semi-continuous countercurrent downstream processing method

Xin

Meng

et al. 2015

J. Chem. Technol. Biotechnol.

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BACKGROUND Recovering high value‐added substances (oil, zein and carotenoids) from corn distillers dried grains with solubles (DDGS), the major coproduct of bioethanol, is important to enhance the profit of the corn ethanol process. Currently, few studies have been reported on separating high value‐added substances in a process suitable for industrialization. In this article, a semi‐continuous countercurrent extraction method was investigated to refine the corn DDGS. RESULTS First, an oil yield as high as 94.5% (based on oil content in DDGS) was measured using a series of five packed columns. Second, the DDGS residues after oil extraction were used for zein extraction, obtaining a zein yield of 24.5% (based on protein content in DDGS) with a series of four packed columns. Moreover, the carotenoids in zein were extracted by anhydrous ethanol in a Soxhlet apparatus. The extractives, which accounted for 17% of the original mass of zein, had a carotenoids content of 2.4 mg g−1. Finally, zein was decolored by hydrogen peroxide to form a whiter product. CONCLUSIONS The semi‐continuous countercurrent method was developed successfully to refine the corn DDGS. The corn oil with high acid value was a perfect feedstock for biodiesel. The zein obtained achieved the quality of a commercial product. © 2015 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Recovering high value-added substances from corn distillers dried grains with solubles: a semi-continuous countercurrent downstream processing method

Xin

Meng

et al. 2015

J. Chem. Technol. Biotechnol.

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“…It is hydrophobic, renewable, biodegradable, exhibits low toxicity, and is a relatively straightforward biopolymer that can be prepared using electrospinning [ 7 , 8 , 9 , 10 , 11 , 12 ]. Alcohols are excellent solvents for zein; however, a water-ethanol mixture has been shown to be the best solvent for zein [ 13 , 14 , 15 , 16 , 17 , 18 ]. The major structure of zein is a helical wheel conformation in which nine homologous repeating units are arranged in an anti-parallel form stabilized by hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

Optimum Conditions for the Fabrication of Zein/Ag Composite Nanoparticles from Ethanol/H2O Co-Solvents Using Electrospinning

Yang

Rabbani

et al. 2016

Nanomaterials

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The optimum conditions for the fabrication of zein/Ag composite nanoparticles from ethanol/H2O cosolvents using electrospinning and the properties of the composite were investigated. The zein/Ag nanoparticles were characterized using field-emission scanning electron microscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis. The antibacterial activity of the zein/Ag composite nanoparticles was also investigated. The XRD patterns and TEM images indicate the coexistence of a zein matrix and well-distributed Ag nanoparticles.

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“…Also, they form aggregates and precipitate under separation conditions (Bean et al 2000). In general, ethanol solutions have been used to solubilize corn prolamins (Fu and Weller 1999; Lawton 2002; Dickey et al 2003; Guo et al 2005).…”

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confidence: 99%

Comparison of Solubility of Corn Proteins in Propanol, Ethanol, and tert‐Butyl Alcohol Solutions on the Tortilla Process Samples

et al. 2017

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To find the best solvent of those reported and to study changes in protein aggregation during corn processing to obtain tortillas, extractability of corn proteins with three alcoholic solutions (70% ethanol, 50% propanol, and 60% tert‐butyl alcohol) was compared in corn, nixtamal, masa, and tortillas. Relative solubility was assessed through size‐exclusion chromatography, SDS‐PAGE, and insoluble polymeric protein determination using the Dumas procedure. Differences in the behavior of solvents in the samples indicate that different protein interactions are promoted during each of the processing steps. All the three alcoholic solutions can be used to study changes in corn proteins, but the best solvent was 50% propanol. Ethanol (70%) extracted the lowest amounts of corn proteins in tortilla process samples.

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Minimizing entrainment of extract liquid by settling maize particles

Cited by 10 publications

References 9 publications

Recovering high value-added substances from corn distillers dried grains with solubles: a semi-continuous countercurrent downstream processing method

Recovering high value-added substances from corn distillers dried grains with solubles: a semi-continuous countercurrent downstream processing method

Optimum Conditions for the Fabrication of Zein/Ag Composite Nanoparticles from Ethanol/H2O Co-Solvents Using Electrospinning

Comparison of Solubility of Corn Proteins in Propanol, Ethanol, and tert‐Butyl Alcohol Solutions on the Tortilla Process Samples

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