Premium
Effect of selected impurities on the continuous precipitation of calcium sulphate (gypsum)
Author(s) -
Budz Jerzy,
Jones Alan G.,
Mullin John W.
Publication year - 1986
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280360402
Subject(s) - impurity , gypsum , nucleation , precipitation , agglomerate , economies of agglomeration , crystal growth , aqueous solution , brine , crystal (programming language) , materials science , ion , aluminium , mineralogy , inorganic chemistry , chemical engineering , chemistry , metallurgy , crystallography , composite material , programming language , physics , organic chemistry , meteorology , computer science , engineering
The effects of selected cationic and anionic impurities on the precipitation of gypsum in aqueous brine have been studied in a continuous MSMPR crystalliser. Crystal size distributions, determined by in situ Malvern laser light‐scattering measurements, were found to be bimodal. The suspected presence of agglomerates was confirmed by microscopy. Aluminium and maleate ions both enhanced the degree of agglomeration, but reduced the overall growth and nucleation rates. Contrary to expectation, fumarate ions also exerted an observable effect on both agglomeration and crystal growth.