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Use of activited earths in palm oil refining and their effect on trace metal contaminants Palm oil product technology in the eighties; proceedings

by Shaw, D.B; Tribe, G.K. Laporte Industries Ltd., Widness, Cheshire (RU); Pushparajah, E; Rajadurai, M. eds; Palm Oil Research Inst. of Malaysia, Kuala Lumpur (Malasia); Incorporated Society of Planters, Kuala Lumpur (Malasia); International Conference on Palm Oil Product Technology in the Eighties Kuala Lumpur (Malasia) 22-24 Jun 1981.
Publisher: Kuala Lumpur (Malasia) 1983Description: p. 115-123.ISBN: 9679949001.Subject(s): REMOCION DE OXIDANTES | ELAEIS GUINEENSIS | ACEITES DE PALMAS | HIERRO | COBRE | CONTAMINANTES | PURIFICACION | ACIDO CITRICO | FOSFORO | ELAEIS GUINEENSIS | PALM OILS | IRON | COPPER | POLLUTANTS | PURIFICATION | CITRIC ACID | PHOSPHORUS | ELAEIS GUINEENSIS | HUILE DE PALME | FER | CUIVRE | POLLUANT | PURIFICATION | ACIDE CITRIQUE | PHOSPHORESummary: The removal of copper and iron impurities from crude palm oil was investigated. Use of the degumming agents, phosphoric and citric acid, do not remove copper and iron themselves in the form of phosphatide gums. Ion exchange materials such as zeolites and cation exchange resins were found only to remove a portion of the iron and cooper present. For acceptable removal of metal impurities, a material possessing the correct type of adsorption properties is necessary. High activity bleaching earths have been found to be most suitable in this respect. Pre-treatment with phosphoric or citric acid acts to convert the metal complexes into a more easily adsorbed form
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The removal of copper and iron impurities from crude palm oil was investigated. Use of the degumming agents, phosphoric and citric acid, do not remove copper and iron themselves in the form of phosphatide gums. Ion exchange materials such as zeolites and cation exchange resins were found only to remove a portion of the iron and cooper present. For acceptable removal of metal impurities, a material possessing the correct type of adsorption properties is necessary. High activity bleaching earths have been found to be most suitable in this respect. Pre-treatment with phosphoric or citric acid acts to convert the metal complexes into a more easily adsorbed form

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