Factors that affect oil decolorization, decoloring oil raw material quality, detailed analysis is as follows:
1. The water oil decoloring, when adsorbent to join the activity of adsorbent center first adsorbed oil contained in the water, with the increase of bleaching temperature, the adsorption of moisture evaporation, adsorbent escapes out of the surface area for adsorption pigments.Before the decoloring, must be conducted under the condition of vacuum dehydration, decolor raw oil moisture control at 1% advisable.
2. The oil adsorption decolorizing phospholipids content is to use the adsorbent has a great deal of surface activity, through chemical bond force and the gravity of the pigments in the oil adsorption separation between molecular discolor the grease.If decoloring oil pretreatment effect is bad, phosphatide content in oil is bigger, the bleaching (http://www.cottonseedmill.com/bleaching/) effect is poor, will increase in the amount of adsorbent, and affect the decolorizing filtration.
3. The amount of residual soap decoloring oil raw material pretreatment process, if the washing effect is not good, oil soap residue amount is larger, or part of the existence of oil soluble soap, because its itself has no fixed appearance, viscosity, strong polar groups, when carries on the decolorizing, after joining adsorbent, this part of the residual soap will first combined with adsorbent, occupy a part of the adsorbent surface activity and thus reduce decolorizing efficiency, or increasing the dosage of the adsorbent.
4. Due to containing trace metal ions in metal ions, raw material oil Fe2, Cu2, M, Ca2, etc., especially Fe, Cu2 ions, they are not only for oil catalytic oxidation sunflower oil extraction (http://www.sunflowermill.com), but also easy to trace phospholipids generated compound nonhydratable phospholipids in oil and oil soluble soap, these products are strong polar groups containing metal ions.In decolorizing adsorbent of H is easy to be free of...