Abstract
The application of the chemical exchange properties of zeolites to the art of water softening indicates an important step in the evolution of the art. The peculiar ability of zeolites to exchange their alkaline bases has been known for a number of years. Dr. Robert Gans of the Royal Prussian Geological Institute has been the foremost investigator of this group of minerals, and is probably the first to conceive of their applicability to water purification. Dr. Gans and others have measured the exchange capacity of a large variety of natural zeolites, and concluded that the natural deposits were either too rare or too greatly associated with impurities to be of commercial value in themselves. He therefore sought to develop a synthetic product having as large an exchange capacity as possible. His product is beginning to be fairly well known in this country and is coming into extensive commercial use abroad. You are probably acquainted with the general nature of the process. The synthetic product, in chemical composition, is a hydrous aluminum silicate in combination with sodium. A hard water
Published Version
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