Prysiazhnyi O. The technology for recovering copper and vanadium compounds from a byproduct of adipic acid synthesis

The object of research – the process of extracting compounds of copper and vanadium from the by-product of the production of adipic acid, followed by the return of metals to the main synthesis. The purpose of the study – the development of economically viable and resource-saving technology, which will allow efficient removal of copper and vanadium compounds from the by-product of adipic acid production. Research methods – to solve the problems, a complex of modern methods of theoretical and experimental research was used. Theoretical and practical results – a technological sequence and modes of carrying out the production process of copper and vanadium extraction from a mixture of lower dicarboxylic acids; the basic technological scheme of extraction of copper and vanadium compounds and their returning to the technological cycle is developed; the technical novelty of the proposed technology for the removal of copper and vanadium compounds from wastes is confirmed by the three patents of Ukraine on the utility model. Novelty – the phase and chemical composition of the dry mixture of lower dicarboxylic acids was established for the first time; the thermodynamic characteristics of succinate, glutaratum and copper adipinate (II) were first calculated; the chemistry of the process of interaction of elemental sulfur with compounds of copper in a mixture of LDA; the mechanism of sulfur regeneration during the interaction of copper sulphide precipitate with nitric acid is clarified; the solubility of dicarboxylic acids and copper and vanadium dicarboxylate for the first time in organic solvents of different chemical nature. Degree of integration – the results of research were transferred to the State Research and Design Institute of Basic Chemistry (NIOCHIM, Kharkiv) for the development of a feasibility study on investment and the design of industrial plants for the removal of copper and vanadium compounds from a mixture of lower dicarboxylic acids. Application – the results of the work can be applied to the chemical industry.