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Wet chemical synthesis of low bulk density aluminium hydroxide powder
Author(s) -
Pradhan JK,
Gochhayat PK,
Bhattacharya IN,
Das SC,
Panda RK
Publication year - 2003
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.837
Subject(s) - aluminium , hydrate , aluminium hydroxide , hydrazine (antidepressant) , aqueous solution , hydrolysis , aluminium nitrate , hydroxide , particle size , base (topology) , aluminium powder , chemistry , lightness , inorganic chemistry , materials science , nuclear chemistry , metallurgy , chromatography , organic chemistry , mathematical analysis , physics , mathematics , optics
Fine, low bulk density aluminium hydroxide powdered gel was prepared by the mild base hydrolysis of an aqueous solution of aluminium sulfate with hydrazine hydrate. Parameters such as method of addition of reactant, initial concentration of Al 3+ , mole ratio, final pH and hydrolysis temperature have a profound effect on the lightness and particle size of the powder. Optimized conditions showed that the final pH, Al 3+ concentration and method of addition of reactant have a major contribution on the formation of lighter grade powder. Experiments conducted using other bases also produced lighter particles under similar conditions. Deviation from the optimized conditions led to formation of a higher bulk density product. Copyright © 2003 Society of Chemical Industry