ON THE CONCEPT OF DEVELOPING OPTIMIZED TECHNOLOGY OF OBTAINING MOLYBDATES AND TUNGSTATES OF d-ELEMENTS IN THE SOLID PHASES ON THE BASIS OF METABOLIC REACTIONS IN THE MUTUAL SYSTEMS MeSO4-Na2CO3-Mo(W)O3 WITH THEIR HEAT TREATMENT ((Me – d-ELEMENT)

Abstract: the paper presents the material devoted to the development of the concept of optimized technology for the production of molybdenum (tungstates) elements of the d-family (Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Ag) at a relatively low temperature, based on the model of a physico-chemical system, in which it is possible to form a thermally unstable intermediate phase – donor of high-defect oxide d-element, entering at the time of its formation into chemical interaction with thermally activated Mo(W)O₃ with the formation of MeMo(W)O₄.

In the process of solving the problem of finding the necessary to achieve the goal of the real prototypes of the chosen model of the physico-chemical system, taking into account the properties of reagents and products of their interaction, and in particular, the thermal instability of carbonates d-elements (their average decomposition temperature 300⁰C), it was concluded that they can be a system such as MeSO₄-Na₂CO₃-Mo(W)O₃, which was justified and confirmed in the laws of physico-chemical analysis, thermodynamics, chemical kinetics, theories of polarization of Nekrasov ions, acids and Lewis’s grounds and confirmation in the experiment.

Keywords: synthesis, concept, optimized production technology