- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Two synthesis methods were used for the conversion of phosphogypsum to ammonium sulfate and calcium carbonate: (i) Two-step method: it consists of reacting ammonia aqueous solution with CO 2 to produce ammonium carbonate. This last product reacts with PG to form ammonium sulfate (NH 4) 2 SO 4 and calcium carbonate CaCO …
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The carbon dioxide and ammonia water react with red gypsum to manufacture ammonium sulfate and solid phase products. And solid phase products neutralize pickling wastewater to produce metal-enriched red gypsum for the next cycle. After the cycle, solid phase product with one circulation (containing 39.45% Fe and …
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Ammonium sulphate is widely used as a sulphur (S) fertilizer, constituting about 50% of global S use. ... Ammonia volatilization, leaching of nitrogen and corn yield response to the application of mix of urea and ammonium sulphate or gypsum. Revisata Brasileira Ciência De Solo, 32, 2331–2342.
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This paper considers the ammonium sulfate attack of high-strength concrete (grade 100). An accelerated attack consisting in wetting–drying cycles was adopted throughout this study. ... aluminate hydrates, thus forming expansive ettringite. Sodium sulfate reacts on calcium hydroxide and forms expansive gypsum, which, in …
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The document outlines calculations to determine the raw material requirements for a 300 tonne per day ammonium sulphate plant operating 24 hours per day. It details the chemical reactions involved and calculates that 12,500 kg of ammonium sulphate must be produced per hour. Taking into account process losses, 12,400 kg/hr is the required …
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In order to study the resource utilization of sintering flue gas desulfurization gypsum,the reaction of ammonium carbonate and the sintering flue gas desulfurization gypsum was involved to prepare calcium carbonate and ammonia sulfate.The process of the reaction was investigated,and the reaction mechanism and the reaction kinetic equation were …
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Millions of tone of FGD-gypsum by-product may be produced in this decade as a result of the 1990 Clean Air Act Amendments. In this research, bench-scale experiments were conducted to obtain process data for the production of ammonium sulfate from FGD-gypsum and to help evaluate technical and economic feasibilities of …
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Ammonia volatilization, leaching of nitrogen and corn yield in response to the application of mix of urea and ammonium sulphate or gypsum. Waldo Alejandro Ruben Lara Cabezas, Marcos André Souza. 01/Dec/2008. DOI: 10.1590/S0100-06832008000600012 .
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The present invention includes a partially continuous countercurrent process for converting gypsum, by reaction with ammonium carbonate, to products of ammonium sulfate and calcium carbonate by introducing the reactants into reactors, mixing the reactants for a predetermined amount of time, employing a novel combination of countercurrent flows ...
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The functional groups control the adsorption capacity as well as ion selectivity. Adsorption of ion exchange could be a better process compared to lime precipitation, because addition of lime precipitates the sulphate as a gypsum but still some low amount of dissolved sulphate may be present in the solution at below the gypsum …
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Ammonium sulfate is used as a fertilizer because it supplies nitrogen and sulfur for plant nutrients. It can be obtained by three processes: as recovery from coke oven, a by-product from caprolactum and gypsum process. Natural gypsum fulfills the demands of the cement industries and is used by farmers as a direct fertilizer for …
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Ammonium sulfate reacts with calcium hydroxide to produce ammonia, gypsum (calcium sulfate), and water. The reaction is as follows: [(NH_4)_2SO_4 + Ca(OH)_2 rightarrow 2NH_3 + CaSO_4 + 2H_2O] 02 Calculate moles of ammonium sulfate. Using the molar mass of ammonium sulfate, calculate the moles of ammonium sulfate present in 1584 …
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Ammonium sulfate is also produced from gypsum, which is calcium sulfate dihydrate (CaSO 4 • 2H 2 O), via the Haber process. This involves first converting natural gas (methane) into hydrogen, then reacting the hydrogen with nitrogen to produce ammonia, and finally, the ammonia is reacted with the gypsum to yield ammonium sulfate. …
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Costs for constructing and operating a conceptual plant based on a proposed process that converts flue gas desulfurization (FGD)-gypsum to ammonium sulfate fertilizer has been calculated and used to estimate a market price for the product. The average market price of granular ammonium sulfate ($138/ton) exceeds the rough estimated cost of …
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Ammonium Sulfate | (NH4)2SO4 or H8N2O4S | CID 6097028 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. ... An alternate method for converting gypsum into ammonium sulfate and calcium carbonate is the ...
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The present invention includes a partially continuous countercurrent process for converting gypsum, by reaction with ammonium carbonate, to products of ammonium sulfate and calcium carbonate by introducing the reactants into reactors, mixing the reactants for a predetermined amount of time, employing a novel combination …
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A continuous countercurrent flow process for converting FGD gypsum to ammonium sulfate and calcium carbonate including countercurrent flows with internal recycle of liquids to maximize the purity of reaction products while minimizing reaction times, and further include embodiments of the process that provide a yield of both ammonium …
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When gypsum is blended into a compost windrow or mixed in a manure pile, the sulfate salt naturally attaches to the ammonia molecules, forming ammonium sulfate – effectively trapping it in another stable form and preventing ammonia volatilization.
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Ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by NiCl 2 .6 H 2 O to form a stable coordination compound [ Ni NH 36] Cl 2. . Assume that both the reactions are 100 % complete. If 1584 g of ammonium sulphate and 952 g of NiCl 2 .6 H 2 O are used in the preparation, the combined weight in grams of gypsum …
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In enhanced phosphogypsum carbonation, water is used as a solvent for dissolving the ammonia, producing the ammonium sulfate, and dissociating phosphogypsum with a fast carbonation reaction rate. Using more water in the process will decrease the obtained ammonium sulfate concentration.
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