Abstract:

The purpose of the present study was to optimize the decolorization of soybean oil using single-factor design
and response surface methodology and to compare the color reversion of soybean oil treated with attapulgite clay with
conventional decolorized soybean oil after heating at 105 ℃. The optimal decolorization conditions were 32 min, 110 ℃,
250 r/min of stirring speed and 3% of decolorizing agent. Under these conditions, the decolorization ratio of soybean oil was
71.83%. Comparative results showed that the soybean oil treated with attapulgite clay was more stable and more resistant
against color reversion.

Key words: soybean oil, attapulgite adsorbent, bleach, color reversion