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Adsorption of β-carotene: II. On cation exchanged bleaching clays

  • Technical
  • Published:
Journal of the American Oil Chemists Society

Abstract

X-ray diffraction patterns of a number of commercial bleaching earths indicate that they consist mainly of montmorillonite mixed with smaller amount of kaolinites as well as mica, quartz and cristobalite. The active sites in these earths for the adsorption of β-carotene are identified through ion exchange and found to be the protonic sites and some metallic ions. The efficiencies of the various cations in imparting activities to the earths are found to be in the order Mg2+ > Fe3+ > H+ > Ca2+ > Na+. For Fe3+ and H+ exchanged clays, the activity was found to be linear function of the concentration of these ions. The high activities of Mg2+ and Ca2+ exchanged clays are discussed.

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Authors and Affiliations

  1. School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia

    K. Y. Liew, S. H. Tan, F. Morsingh & L. E. Khoo

Authors
  1. K. Y. Liew
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  2. S. H. Tan
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  3. F. Morsingh
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  4. L. E. Khoo
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Additional information

Presented in part as paper T12 in the International Conference on Palm Oil Product Technologies in the Eighties, Kuala Lumpur, May 1981.

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Liew, K.Y., Tan, S.H., Morsingh, F. et al. Adsorption of β-carotene: II. On cation exchanged bleaching clays. J Am Oil Chem Soc 59, 480–484 (1982). https://doi.org/10.1007/BF02636147

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  • DOI: https://doi.org/10.1007/BF02636147

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