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Resins for Purity by R.H. Oppermann is a Engineering article available to read on EtoBox.

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## Resins for Purity.--According to the Industrial Bulletin of Arthur D. Little, Inc., Number 168, water equivalent to distilled in purity but produced without heating is reported to be the product of synthetic resin treatment. The resins for this treatment are of two types, the polyhydric phenol-formaldehyde type used for changing a calcium chloride water impurity, for instance, to hydrochloric acid by replacing the calcium with hydrogen, and the amine-formaldehyde type which removes the acids themselves. As "base exchange" media substituting one type of water impurity for another of less injurious type, the polyhydric phenolic resins promise improvements over other materials, but the amine-formaldehyde resins, used with the phenolics, offer an entirely new method of complete water purification. Hydrogen is available in the resin's hydroxyl group which readily goes into solution to replace calcium or sodium ions and forms acids, or, if desired the resin may be reacted with sodium and will then replace calcium or magnesium impurities with sodium. The general dependability of the phenolic resins is said to be superior to that of previous softening media; they are reportedly physical

Who reads Resins for Purity?

Author

R.H. Oppermann

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0016-0032)

Published

1941

Language

EN

Field

Engineering (Physical Sciences)