Cottonseed colour fixed pigments. Part III. Prevention of colour fixation and removal of colour‐fixed pigments

Attia, Mohamed I.; Abbasy, M.; El‐Nockrashy, A. S.; Shoeb, Z. E.

doi:10.1002/food.19810250702

Cited by 5 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All values represent an average of 3 runs. Ethanolamine and sodium silicate were used as additives based on an overall screening of several additives [6].…”

Section: Resultsmentioning

confidence: 99%

Bench‐scale treatments of colour‐fixed cottonseed oil

Attia

Taha

Mustafa

et al. 1988

Nahrung

Self Cite

View full text Add to dashboard Cite

Bench-scale refining of crude colour-fixed cottonseed oil was carried out using equipment and conditions similar 10 those ;it a local factory. Ethanolamine at 2 ~ 3"" level resulted in 55---62", reduction in the oil colour, and 24-26 o?; reduction in the refining loss over the factory treated oil. Sodium silicate at 0.14-0.47',, level resulted in about 50% reduction in oil colour and 24-440., reduction in the refining loss. A two-step treatment, first with caustic soda lye then with either additives. and miscella relining using ethanolamine as an additive, resulted in superior oil colour, yet the refining losses were high.

show abstract

“…All values represent an average of 3 runs. Ethanolamine and sodium silicate were used as additives based on an overall screening of several additives [6].…”

Section: Resultsmentioning

confidence: 99%

Bench‐scale treatments of colour‐fixed cottonseed oil

Attia

Taha

Mustafa

et al. 1988

Nahrung

Self Cite

View full text Add to dashboard Cite

show abstract

“…This efficiency may be probably due to the alkaline character of sodium stereate as well as sodium oléate. From previous investigations, gossypol proved to be the responsible factor for colour fixation of cottonseed oil (1,6,14). Colour fixation is more pronounced in the refined and bleached oil samples, also in the fixed refined and bleached oil samples containing gossypol.…”

Section: C10>c5anda10>a5>gmentioning

confidence: 99%

“…Eight samples of the crude cottonseed oil containing the additives were subjected to colour fixation at 60 °C for a period of 15 days as described by Pons etal{5) and recommended by Atteia et al (6) The samples are as followes:…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Trials to improve the colour of colour fixed cottonseed oil using sodium oleate and sodium stearate in the absence and presence of azeotropic extract of cottonseed meal

Yousef¹

1998

Grasas y Aceites

View full text Add to dashboard Cite

“…These pigments develop either during the stage of seed or oil storage or during oil processing. Development of such type of pigments during processing is highly accelerated at high temperatures (1)(2)(3)(4)(5) . Pigment fixation may occur during the heating process necessary to evaporate the solvent from miscella (6) .…”

Section: Introductionmentioning

confidence: 99%

Assessment of the process of cottonseed oil bleaching in hexane

Megahed¹

2002

Grasas y Aceites

View full text Add to dashboard Cite

RESUMENEvaluación del proceso de decoloración del aceite de semilla de algodón en hexano.Este trabajo ha sido iniciado para evaluar la viabilidad de la decoloración del aceite de semilla de algodón en miscela como un paso de procesado siguiente a la refinación alcalina en miscela. La refinación alcalina de aceite de semilla de algodón en miscela tiene varias ventajas sobre las tecnologías de refinación convencionales con respecto a la calidad del aceite, pérdida de aceite y coste del proceso.Por tanto, ha sido comparada la eficacia del proceso de decoloración de aceite de semilla de algodón sin solvente y en una relación volumétrica aceite:hexano 1:1. La decoloración en presencia de hexano se llevó a cabo a 25 o C mientras que la decoloración convencional a 110 o C. Se utilizaron diferentes lotes de tierras decolorantes en cada una de las dos técnicas de decoloración y se determinaron los índices de color de los aceites antes y después de la decoloración. La eficacia del proceso ha sido evaluada de acuerdo con la capacidad de decoloración, las pérdidas de aceite en tierras agotadas, la velocidad de filtración del aceite de la tierra decolorante y la acidez del aceite decolorado así como su contenido en peróxido.Los resultados fueron usados para predecir las ecuaciones de adsorción de Freundlich para los pigmentos de los aceites en ambos casos. Estas ecuaciones fueron utilizadas posteriormente para predecir el color de los aceites obtenidos por decoloración de los aceites refinados de grados diferentes. Los resultados han mostrado que la decoloración del aceite es más eficaz en presencia de solvente cuando el aceite inicial es de un grado aceptable, y la inversa es verdad para aceites de bajo grado. También, la posibilidad de oxidación del aceite es menor durante la decoloración en presencia de solvente. Por otro lado, la decoloración en miscela ha proporcionado otras dos ventajas adicionales sobre la decoloració n conve ncion al. La filtración de aceite de la tierra decolorante es más rápida en la decoloración en miscela y las pérdidas de aceite sobre las tierras agotadas es baja. Esto se reflejará en la economía del proceso global. PALABRAS-CLAVE: Aceite -Decoloración -Hexano -Refinación en fase miscela -Semilla de algodón. SUMMARY Assessment of the process of cottonseed oil bleaching in hexane.This work has been initiated to assess the feasibility of bleaching cottonseed oil in miscella as a processing step next to alkali refining in miscella. Alkali refining of cottonseed oil in miscella has several advantages over conventional refining technologies with respect to oil quality, oil losses and process cost.Th ere fore, the process e fficiency of the blea ching of cottonseed oil in presence of hexane (at a volumetric ratio of 1:1), has been studied and compared to that without solvent. The bleaching in presence of hexane was carried out at 25 o C whereas that by conventional bleaching at 110 o C. Different clay loads were used in each of the two bleaching techniques and the colour indices of the oils before and...

show abstract

Cottonseed colour fixed pigments. Part III. Prevention of colour fixation and removal of colour‐fixed pigments

Cited by 5 publications

References 15 publications

Bench‐scale treatments of colour‐fixed cottonseed oil

Bench‐scale treatments of colour‐fixed cottonseed oil

Trials to improve the colour of colour fixed cottonseed oil using sodium oleate and sodium stearate in the absence and presence of azeotropic extract of cottonseed meal

Assessment of the process of cottonseed oil bleaching in hexane

Contact Info

Product

Resources

About