METHOD OF PROGRESSIVE PREDEFECATION OF DIFFUSION JUICE Russian patent published in 2001 - IPC

FIELD: sugar production. SUBSTANCE: diffusion juice is alkalinized with lime to pH 7.5- 8.0 and simultaneously affected by alternate electric field with intensity 650-750 V/m for 0.5-5.0 min. Juice is then introduced into predefecator, in which it is mixed with lime, and unfiltered 1st-saruration juice or suspension of 1st- and 2nd-saturation juice precipitate are returned in countercurrent mode, while their alkalinity is increased in several steps to pH 10.8-11.6. Predefecated juice is drawn off defecator and a part of it in amounts from 25 to 75% of total amount of diffusion juice is fed into upright tubular saturator and saturated. Saturated juice id returned into predefecation stage. EFFECT: increased purification effect and thereby improved quality of diffusion juice. 1 tbl