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Effect of chemical modifiers on borax crystal growth, nucleation and habit

✍ Scribed by A. D. Randolph; A. D. Puri

Publisher: American Institute of Chemical Engineers
Year: 1981
Tongue: English
Weight: 795 KB
Volume: 27
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690270114

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The effects on the fine‐crystal CSD of various surface active and ionic additives were studied for the sodium tetraborate decahydrate (borax) system. The organic modifiers used were effective at the ppm level. Surface active agents inhibited nucleation rate, while ionic additives increased nucleation. A simultaneous reduction in both the linear‐crystal growth rate and the degree of polycrystalline growth was observed in both cases. These effects correlated with modifier concentration in the liquor, but not with modifier/solids ratio. Borax exhibits classical magma and RPM‐dependent secondary nucleation and the results were well‐correlated with a conventional power‐law kinetic model.

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