METHOD FOR PREPARING BIOCIDAL AND ANTIFOULING AQUEOUS COMPOSITIONS COMPRISING HYDROBROMIC ACID, UREA AND SODIUM HYPOCHLORITE

摘要

The invention provides a biocidal and anti-biofouling composition from highly concentrated precursors, and a process for manufacturing the composition.

主权项

1. A method for manufacturing a biocidal and antifouling composition, comprising the steps of
i) providing aqueous solution A containing HBr at a concentration of between 33 wt % and 38 wt %, and urea at a weight ratio of urea/HBr of between 0.6 and 0.9; ii) providing aqueous solution B containing sodium hypochlorite (NaOCl) in an amount corresponding to a weight ratio of NaOCl (as Cl2) to said HBr in said solution A of from 0.4 to 0.8; and iii) combining said aqueous solutions A and B optionally after diluting one or both of the solutions with water;wherein said solution A may be stored for up to one year at 40° C. without significant decomposition.