%0 Journal Article
%T Sodium aluminates obtained from the Al(NO3)3 £¿ 9H2O ¡ª NaOH system using the controlled precipitation method
%A Christhy Vanessa Ruiz Madro£¿ero
%A Jorge Enrique Rodr¨ªguez P¨¢ez
%J -
%D 2010
%X Sodium aluminate, NaAlO2£¿ xH2O, is an important comer- cial chemical used in water treatment, as a source of alumi- nium in the preparation of zeolites and other catalytic mate- rials and as an additive in paper manufacturing. Sodium alu- minates were synthesised in this work by using the Al(NO3)3 £¿9H2O- NaOH system¡¯s controlled precipitation method. Using the controlled precipitation method enabled identifying the process¡¯s different stages from potentiometric titration of Al(NO3)3 £¿ 9H2O dissolved in water and using NaOH as precipitating agent to ensure control and reproducibility and also identify final product characteristics. Powders were characterised by infrared spectroscopy (FTIR), X-ray diffraction (XRD) and gravimetric and differential thermal analysis. The results indicated that NaAlO2 crystallised well at 1,000¡ãC (obtained as the main crystalline sodium aluminate phase) and that ¦Â-alumina treatment began to form at 1,500¡ãC
%K sodium aluminate
%K synthesis
%K controlled precipitation method
%U https://revistas.unal.edu.co/index.php/ingeinv/article/view/15726