METHOD OF TREATING CONDENSATE DURING PULPING Russian patent published in 2025 - IPC D21C9/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a treated condensate which does not contain an organic substance by treating the condensate using at least one of physical, chemical, physical-chemical treatment or combinations thereof. In addition, a method of treating condensate in a fibre pulping line using several washing steps is also provided, where at least the treated condensate circulates in a closed cycle, before feeding the condensate into the fiber line, wherein the method includes steps of: a) identifying colloidal organic compounds in the condensate, b) subjecting the condensate to at least a combination of coagulation and flocculation, and c) reducing contamination of condensate with its supply to the last stage of washing or to any other stage of the pulping process. Coagulation is carried out using at least a cationic polyamine, an anionic polyamine or combinations thereof. Flocculation is carried out using at least cationic polyacrylamide, anionic polyacrylamide or combinations thereof.

EFFECT: invention enables separation of the resin, mainly consisting of an organic substance, from the condensate, which enables measurement and further identification of such compounds and their amounts.

15 cl, 13 dwg, 2 tbl, 8 ex