Methods, compositions and systems for controlled release of chlorine dioxide gas

摘要

A method for producing ice having substantially no undesirable taste and odor characteristics which comprises freezing water in the presence of chlorine dioxide gas. Method, composition and system for generating chlorine dioxide gas in a controlled release manner by combining at least one metal chlorite and a dry solid hydrophilic material that reacts with the metal chlorite in the presence of water vapor, but does not react with the metal chlorite in the substantial absence of liquid water or water vapor to produce chlorine dioxide gas in a sustained amount of from about 0.001 to 1,000 ppm.