METHOD OF MANUFACTURE OF SOLID FILTER ELEMENT Russian patent published in 2002 - IPC

FIELD: cleaning hydrocarbon liquids; chemical , petroleum refining , automotive and other industries. SUBSTANCE: filtering material, for example wood saw dust is impregnated with stabilizing solution and is placed in perforated framework mounted in centrifuge rotor and is subjected to centrifuging for obtaining filter element at preset geometric sizes and porosity varying in radial direction. Centrifuging is effected at angular velocity calculated by formula defining dependence of filtration rating of filter element on angular velocity of rotor rotation. EFFECT: increased mud capacity of filter element due to special organization of pore space; possibility of using entire volume of filter element due to radially varying porosity caused by centrifugal field. 2 cl