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Permeability, Purity, and Yield in Crystal Beds
Author(s) -
Tang Haihao,
Ulrich Joachim
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500737
Subject(s) - supersaturation , crystal (programming language) , impurity , materials science , phosphoric acid , yield (engineering) , seed crystal , permeability (electromagnetism) , crystallography , mineralogy , analytical chemistry (journal) , chemistry , single crystal , chromatography , composite material , metallurgy , organic chemistry , biochemistry , membrane , computer science , programming language
The permeability of a phosphoric acid hemihydrate crystal bed as well as the crystal yield and the crystal purity were studied in order to find a suitable range for the operation of a hydraulic wash column. The key parameters were the width of the crystals as a measure of crystal size, the supersaturation, and the stirring speed. The results show that a crystal bed which contains larger crystals gives a higher permeability. A higher supersaturation leads to a higher crystal yield but more impurity inclusions in crystals. A higher stirring speed causes more impurity inclusions in crystals, as well.
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