Mechanochemical activation of (SeO2+Na2CO3) mixture and sodium selenite synthesis in vibrational mill

摘要

The possibilities of Na2SeO3 mechanochemical synthesis from (SeO2+Na2CO3) stoichiometric mixture were investigated. The experiments mere performed using vibrational mill with rings, On the basis of X-ray diffractograms, IR-spectra, and performed chemical analyses, it has been shown that solid state mechanochemical synthesis of sodium selenite was achieved. By the S-ray and IR-spectra analyses, a qualitative determination of the sodium selenite synthesis dynamics was obtained. The structural changes of input compounds occurring during the mechanical treatment and dynamics of these components' consumption during mechanochemical synthesis were investigated, Based on the layout of the kinetics diagram, if mas concluded that mechanochemical synthesis of sodium selenite, performed under described conditions, appears to be a zero-order reaction. (C) 1998 Academic Press. [References: 22]