Obtaining ammonium sulfate and calcium carbonate by processing natural gypsum and phosphogypsum
Jamshid KholmurodovNamangan Institute of Engineering - Technological, 160115 Kosonsoy Str, 7 Namangan, UzbekistanUktam TemirovNavoi State University of Mining and Technologies, 210100 Galaba Str. 27, Navoiy, UzbekistanShafoat NamazovInstitute of General and Inorganic Chemistry, 100170 Mirzo Ulugbek Str. 77a, Tashkent, UzbekistanRuzmat RadjabovInstitute of General and Inorganic Chemistry, 100170 Mirzo Ulugbek Str. 77a, Tashkent, Uzbekistan
ABI
Abstract
Studying the conversion of local natural gypsum and phosphogypsum, categorized as a byproduct of extracting phosphoric acid (EPA), into ammonium carbonate through a liquid-based method. At the same time, the concentration of ammonium carbonate in an aqueous solution was obtained in the range from 10 to 50%. The norms of ammonium carbonate were 100, 105, 110% relative to stoichiometry. The transfer time of ammonium carbonate to the reaction zone was from 5 to 30 minutes, and the conversion time was also studied in the range from 5 to 30 minutes. The conversion process was carried out at a temperature of 30 to 50°C. The optimal time for the carbonate conversion of gypsum was 30 minutes, and the conversion rate was 95.68 and 96.83%.
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