Prevention of Starch Degradation in Pulp, Paper or Board Making Processes

摘要

The invention relates to biocidal systems comprising zinc ions and an oxidizing or non-oxidizing biocide, their use, and methods for preventing or decreasing starch degradation in starch-containing process waters from pulp, paper or board production processes.

主权项

1. A biocidal system comprising zinc ions and a biocide, which form in situ a biocidal composition, wherein the biocide is selected from an oxidizing biocide or a non-oxidizing biocide, with the proviso that the non-oxidizing biocide does not include zinc pyrithione or 1,2-benzoisothiazolin-3-one and zinc pyrithione.