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Indexed by:会议论文

Date of Publication:2006-01-18

Included Journals:EI、CPCI-S、Scopus

Page Number:905-+

Key Words:aluminum isopropoxide (AIP); nano-alumina; iron-removal; phenolphthalein (P)

Abstract:Aluminum isopropoxide (AIP) is an important precursor in preparing high-purity and nano-alumina. The iron impurity in AIEP has bad effect on the application of nanoalumina. In order to prepare the iron-free AILP, chelate organic ligand is added to this reaction system together with Al and isopropanol to form the high boiling point complex of the iron impurity in AYP by chelation. It has been revealed that phenolphthalein (P), an O-containing organic ligand, can form a stable, non-volatile chelate complex with iron element in the presence of AIP. By adding P into the reaction system and undergoing vacuum distillation after the reaction, 80% of the total product gives a high purity value with Fe content being less than 10 ppm (by Al2O3) that satisfies the need of luminous materials when mass ratio of P: Al is 1:500. A feasible mechanism about removal of trace iron impurity from AIP has been presented.