AMMONIUM-SALT METHODS ARE THE BASIS FOR BUILDING EFFECTIVE NEW TECHNOLOGIES IN CHEMICAL AND METALLURGY INDUSTRIES

Abstract

The article contains new data, which is a continuation of the research for the development of scientific theoretical applied directions, which appeared in previous publications related to the field of chemical technologies and metallurgy. Previous studies have used ammonium salts as reagents for the production of synthetic sodium carbonate and fluorides, but this publication shows the possibilities of using them for the development of non-ferrous metallurgy. The purpose of the work is to show the importance of the anionic hydrogen atom contained in ammonium bisulfate (ABS) in entering the compound. Thermodynamic, thermal, renggenphase analysis and mathematical programs were used in the research methods. Physical and chemical changes in reaction mixtures, some synthesized salts when heated using the system derrivatograph Q-1000/D of the company" mom " F.Paylik, J. Paylik, L. Erdey and LabSys Evo were studied using special standardized factory structures such as TG-DTA/DSC (Setaram, France). The probability of some reactions occurring or not occurring was thermodynamically evaluated using the HCs-5.1 Chemistry (Outokumpu) "Astra-4" software package (complex). In the results of the study, the method of processing raw materials of non-ferrousmetals is presented in the form of a basic technological scheme.The possibility of formation of intermediate complex Tutton salts during production of the final product and reactions leading to their decomposition has been shown by thermodynamic studies. It is shown that the decomposition of such ammonium nickel sulfate salt releases ammonia into the melt of crystalline metal sulfate and ammonium bisulfate at about 235-260°С, where the pyrolysis of ammonium sulfate begins. It was observed that the by-products of (NH4)2Ni(SO4)2nickel ammonium Tutton's salt heated in the ABS melt up to 300-350°C are nickel sulfate and ABS melt, and ammonia also reacts upon re-cooling. It was experimentally determined that this "heating-cooling" process changes the color of ABS melt from lemon yellow to white. During the repetition of the process, it was found that this phenomenon is repeated until the excess melt is exhausted. This phenomenon is explained by the formation of nickel acid salt between nickel sulfate and ABS melt, which no one has studied before. It was concluded that this phenomenon should be common to ABS melt with sulfate of other metals.