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COMPARISON OF THE EFFICIENCY OF ADSORBENTS FROM DIFFERENT MANUFACTURERS IN THE PROCESS OF ADSORBATIVE BLEACHING OF COTTON OIL

Authors

Akhmedov Azimjon Normuminovich, Niyozov Ma’murjon Bobonazarovich

Rubric:Food processing industry
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In this work, the efficiency of adsorbents imported from Switzerland and China in the adsorption bleaching process of refined cottonseed oils obtained by pressing and extraction methods was comparatively studied. The bleaching process was carried out under vacuum at a temperature of 90°C for 30 minutes, and the adsorbent consumption was varied in the range of 1.0-3.0%. The results showed that with an increase in the adsorbent consumption, the color indicators significantly decreased, but at a rate higher than 2.0-2.5%, the increase in efficiency slowed down, which is explained by the saturation of the adsorption centers. The Swiss adsorbent showed high selectivity in color reduction, reduction of unsaponifiables and peroxide value, and showed a lower oil capacity.

Keywords

Cottonseed oil
adsorption bleaching
bleaching earth
color indicator.
bentonite

Authors

Akhmedov Azimjon Normuminovich, Niyozov Ma’murjon Bobonazarovich

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References:

Rossi, M., Gianazza, M., Alamprese, C., Stanga, F. (2001). The effect of bleaching earths on oil quality and refining performance. Journal of the American Oil Chemists’ Society, 78(10), 1051–1056.

 Dijkstra, A.J. (2016). Edible Oil Processing: Refining. AOCS Press, Urbana.

Sabah, E., Çelik, M.S. (2005). Interaction of bleaching earth with vegetable oils. Food Chemistry, 92, 29–36.

Lin, L., Cunshan, Z., Vittayapadung, S., Xiangqian, L., Mingdong, Z. (2014). Opportunities and challenges for biodiesel fuel. Applied Energy, 88, 1020–1031.

 Zschau, W. (2004). Bleaching of edible fats and oils. European Journal of Lipid Science and Technology, 106, 1–5.

 Boki, K., et al. (1992). Adsorption of pigments from vegetable oils by bleaching earth. Journal of the American Oil Chemists’ Society, 69(3), 232–236.

Standard 5477-2015. Vegetable oils. Methods for determining color.

Standard 5476-80. Vegetable oils. Methods for determining acid value.

Standard 11812-2022. Vegetable oils. Methods for determining moisture and volatile matter.

Standard 5481-2014. Vegetable oils. Method for determining non-fatty impurities and sediment.

Standard 5480-2023. Vegetable oils and natural fatty acids. Methods for determining soap.

Standard 5479-2023. Vegetable oils and natural fatty acids. Methods for determining unsaponifiable substances.

Standard 26593-85. Vegetable oils. Method for measuring peroxide value.

Standard 9287-59. Vegetable oils. Closed crucible flash point test method.

Uzbek State Standard 816:2015. Refined cottonseed oil. Specifications.

Arutyunyan, N. S. Laboratory practical training on fat processing technology Text. / N. S. Arutyunyan, L. I. Yanova, E. I. Arisheva et al. 2nd ed., revised and enlarged. - M .: Agropromizdat, 1991. - 160 p.

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