Shows the shortcomings of traditional roasting-selenide technology of extraction of selenium. The results of studies on the development of reagentless electrochemical method of removing it. A basic technological scheme of obtaining technical selenium in terms of electroextraction was offer.
A thermodynamic analysis of the system Se – H 2 O was prospect. Plotted dependences the concentrations of selenium oxyanions from the pH of the solution and polarization graphs for various materials of the anode. Draw conclusions about the regularities of selenium electroextraction from selenium solutions.
Now manufacturing of rare chalcogens and precious metals is realizing in processing of sulphidic polymetallic raw material, mainly from muds of copper and nickel electrolysis. In the article the possibility of selenium extraction from alkaline solutions, using electrolysis. Detachment of choosing pH of initial solution are made. Also you can find results of polarizing admeasurements of selenium extraction from selenite – biselenite solutions. The conclusions of possibility of selenium procurement, using electrolysis.
The main trends in crystallization techniques of rubidium extraction from nepheline ores and the possibility to use properties of complex tellurium halides for this purpose are presented in this article.
