METHOD FOR SORPTION-ALKALI OIL REFINEMENT Russian patent published in 2013 - IPC C11B3/06 C11B3/10 

FIELD: chemistry.

SUBSTANCE: method involves adding bleaching clay to oil, holding and separating phases. Before adding sorbent, the oil is heated to temperature of 90-120°C. Holding is carried out at residual pressure of 0.2×10^-3 MPa for 35-50 minutes. The bleaching clay is pretreated with 25% alkali alcohol solution in amount of 5-25% of the weight of the bleaching clay with evaporation of alcohol by drying. The bleaching clay is used in amount of 1-3% of the weight of the oil. Phase separation is carried out by filtering.

EFFECT: invention reduces content of phospholipids, the weight ratio of chlorophylls and free fatty acids, reduces the colour value and acid number, wax remains in the oil and maximum output of triacylglycerides is provided.

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