Processing of Nitrate Solutions for the Preparation of Basic Bismuth Nitrate and Oxide

Abstract

Hydrolytic processing of bismuth-containing nitrate solutions into basic nitrate and bismuth oxide of reagent purity was studied by chemical and X-ray diffraction analyses and electron microscopy. The results were confirmed by industrial trials of the developed procedure based on the oxidation of bismuth metal dissolution of the resulting technical oxide in nitric acid, its purification from impurity metals by aqueous alkaline hydrolysis, transformation of basic bismuth nitrate into basic carbonate, and their calcination to oxide.