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- Title
МОДЕРНИЗАЦИЯ ТЕХНОЛОГИИ ПОЛУЧЕНИЯ ФЕРРАТОВ(VI) ИЗ ГИДРОКСИДОВ ЖЕЛЕЗА
- Authors
Головко, Д. A.; Головко, И. Д.; Шевченко, Л. В.; Гончарова, И. В.
- Abstract
As an alternative of the solid iron salts to improve the ferrate(VI) technology it is proposed to use Fe(II) or F(III) hydroxides that are synthesized using special technique. The patterns of Fe(VI) compounds production from iron hydroxides by hypochlorite method are studied in the article. The effect of the main factors (OH- and Cl- ions concentration, temperature, duration of the synthesis, the molar ratio of the reactants [ClO−]/[Fe(II)] or [ClO−]/[Fe(III)]) to yield of the desired product is studied. It is shown that conversion degree of iron hydroxides into ferrates reaches 80-86 %. It is found that using the Fe(OH)2, except ferrate anions FeO4 2-, byproduct (Fe3O4 magnetite) is formed in an amount not exceeding about 4 % of total Fe. It is found that ferrate(VI) yield is reduced with increasing temperature, therefore for reducing the rate of FeO4 2- decomposition it is recommended to carry out the synthesis at low temperatures. It is found that conversion degree (α) of hydroxides into ferrates is also increased with increase of [ClO−]/[Fe(II)] or [ClO−]/[Fe(III)] values. Therefore, it should be maintained 2-3 fold excess oxidant to ensure the optimal values of α. The practical guidelines of ferrate(VI) production from Fe(II) and Fe(III) hydroxides are developed on the basis of experiments.
- Publication
Technology Audit & Production Reserves, 2017, Vol 1, Issue 3(33), p4
- ISSN
2664-9969
- Publication type
Academic Journal
- DOI
10.15587/2312-8372.2017.92565