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Agglomeration during precipitation: I. Tracer crystals for Al(OH) 3 precipitation
Author(s) -
Ilievski D.,
White E. T.
Publication year - 1995
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690410310
Subject(s) - tracer , gibbsite , economies of agglomeration , precipitation , chemistry , crystal growth , residence time (fluid dynamics) , crystal (programming language) , mineralogy , analytical chemistry (journal) , chemical engineering , crystallography , chromatography , meteorology , geology , programming language , physics , geotechnical engineering , computer science , nuclear physics , kaolinite , engineering
Abstract Tracer crystals are developed to study the agglomeration, growth and residence time behavior of gibbsite crystals, an industrially important polymorph of Al(OH) 3 , in continuous and batch precipitation. Satisfactory tracer crystals contain detectable amounts of Zn and have the crystal structure of gibbsite. The tracer crystals behave in the same manner during precipitation as the nontracer Al(OH) 3 crystals. The application of the tracer crystals for investigating, both batch and continuous, seeded Al(OH) 3 precipitation is demonstrated. The tracer experiments provide information on the growth and agglomeration kinetics of different size fractions. The tracers are a useful tool for the quantitative investigation of solid‐phase residence time distributions within a crystallizer.