METHOD FOR PROCESSING WASTE FILTER POWDER USED IN THE PRODUCTION OF VEGETABLE OIL Russian patent published in 2018 - IPC C11B3/00 

FIELD: fat and oil industry.

SUBSTANCE: invention relates to fat and oil industry. Method of processing waste filter powder provides for loading into the process tank a filter cake and a solvent having a temperature of 85–100 °C, stirring to form a mixture of filter cake and solvent, after the mixing is completed, the mixture is allowed to settle until three layers of finished products are formed: the top layer is the fat mass, the middle layer is the aqueous alkaline solution and the bottom layer is the reconstructed filter powder, then the finished products are discharged, namely, the fat mass is pumped out into the accumulative tank, the aqueous alkaline solution layer is drained into another tank and the recovered filtering powder is discharged. As a solvent, use is made of an aqueous alkaline solution with pH from 9.5 to 13.5, obtained as a result of the processing of sunflower husk ash. Loading of the filter cake and the solvent is carried out simultaneously with constant stirring, while at the end of the load the resulting mixture of solvent and filter cake continue to mix for 20–60 minutes per one ton of filter cake, and upon completion of mixing, defend the resulting mixture for at least 60 minutes, after which the finished products are discharged – fat mass, aqueous alkaline solution and reconstituted filter powder.

EFFECT: invention allows to create a simple method for processing a filter cake, to restore a filtering powder with a residual fat content of not more than 15 %, while reducing energy consumption.

6 cl, 3 tbl