Utilization of phosphogypsum for the preparation of α‐calcium sulfate hemihydrate in chloride‐free solution under atmospheric pressure

BACKGROUND This work aims to investigate the possibility of recycling by‐product phosphogypsum (PG) as raw material for preparing α‐calcium sulfate hemihydrate (α‐CSH) in chloride‐free salt solution under mild conditions. The dehydration of PG in a concentrated Ca(NO3)2 solution at 97 °C under atmos...

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Veröffentlicht in:	Journal of chemical technology and biotechnology (1986) 2018-08, Vol.93 (8), p.2371-2379
Hauptverfasser:	Mi, Yang, Chen, Deyu, Wang, Shuzhou
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum sulfate Aspect ratio Atmospheric pressure Calcium Calcium chloride Calcium sulfate Calcium sulfate hemihydrate chloride‐free system Crystal morphology Dehydration Kinetics mechanical strength Morphology Organic chemistry Phase transitions Phosphogypsum Pressure effects Reaction kinetics Saline solutions salt solution method Succinic acid Sulfates α‐calcium sulfate hemihydrate
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