process for preparing potassium sulfate from phosphogypsum in Mexico
(PDF) Conversion of phosphogypsum to …
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
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Temperature effect on phosphogypsum conversion into potassium …
Phosphogypsum (PG) waste causes several environmental problems. The present work proposes an attractive process to recycle this industrial waste via the wet conversion and contributes to solve this problem. In our previous work, we tried to convert the PG by KOH at ambient temperature, but its total conversion was limited at the …
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Properties, Purification, and Applications of Phosphogypsum…
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded …
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Research Progress on Resource Utilization of Phosphogypsum
The impurities in phosphogypsum and its harm to the environment were introduced, and the advantages and disadvantages of the widely used pretreatment methods were analyzed in this paper. The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co …
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Green method of phosphogypsum waste conversion to lithium sulfate
The valorization of co-products in different fields is an interesting way to minimize many serious problems for ecosystems and human health. The novel process presented in this work is to propose an economic and ecological process of phosphogypsum (PG) conversion using soft chemistry.It makes possible to recover …
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Continuous and simultaneous conversion of phosphogypsum …
In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered a potential source of sulfate, into potassium sulfate compound could help reduce environmental impact and create a new value chain for the phosphate industry. Generally, solid–liquid equilibria are frequently applied in chemical industries. …
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Continuous and simultaneous conversion of …
In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered a potential source of sulfate, into potassium sulfate compound could help reduce environmental impact and create a new value chain for the phosphate industry. Generally, solid–liquid equilibria are frequently applied in chemical industries.
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Phosphogypsum Two-Step Ammonia-Carbonation …
Phosphogypsum Two-Step Ammonia-Carbonation Resulting in Ammonium Sulfate and Calcium Carbonate Synthesis: Effect of the Molar Ratio OH−/Ca2+ on the Conversion Process March 2022 Waste and ...
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Effect of maleic acid and pH on the preparation of α-calcium sulfate …
Phosphogypsum (PG) is a by-product of the wet-process phosphoric acid process, which causes serious environmental issues. In this work, PG was taken as raw material to prepare α-calcium sulfate ...
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Production of Potassium Sulphate by Conversion of Phosphogipsum …
Abstract The possibility of obtaining potassium sulfate by converting calcium sulfate (phosphogypsum) and potassium chloride in an ammonia solution was investigated. The optimal conditions for the process at various concentrations of ammonia solution were determined. When using a 25% solution of NH3, the stirring time is 30–60 …
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Process of preparing chloride-free KNS compound …
Crystallization phase diagrams are frequently used to optimize the evaporation, extraction, and crystallization process (Seader and Henley, 2010).A complete solubility study of the reciprocal K +, NH 4 + // Cl-, SO 4 2--H 2 O system has been investigated previously at 25 °C by Hill and Loucks (1937).In the present study, the …
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Research of new process preparing potassium sulfate from …
To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the influence of solvent such as Methanol, Methanol-ammonia on the yield of potassium …
ادامه مطلبResearch on Two-step Conversion Process to Make …
The process conditions for two-step conversion of phosphogypsum to make K2SO4 are obtained from single factor experiment: The optimal experimental condition for the first …
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Research of new process preparing potassium sulfate from …
Abstract. To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the …
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(PDF) Phosphogypsum Processing Method
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving Moroccan phosphogypsum in NaOH medium.
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Comprehensive Utilization of Phosphogypsum and …
Phosphogypsum is a by-product of phosphoric acid industrial production, and its stacking volume is increasing year by year, which brings a great threat to the environment and agricultural safety. The way of comprehensive utilization of phosphogypsum was described, and the mechanism of phosphogypsum producing …
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Evaluation for the process of mineralization of CO2 using …
Download Citation | Evaluation for the process of mineralization of CO2 using natural K-feldspar and phosphogypsum to produce sulfate potassium | Mineralization of CO2 using thermal activated ...
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Production of Potassium Sulphate by Conversion of …
PRODUCTION OF POTASSIUM SULPHATE 347 In order to intensify this process, it was also proposed to carry out the conversion of these salts in a aqueous ammonia solution [6, 7]. There are no clear recommen-dations on the process conditions for the interaction of phosphogypsum and KCl in order to obtain potassium sulfate.
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Temperature effect on phosphogypsum conversion into …
The present work suggests an attractive process allowing total PG conversion by potassium hydroxide KOH. This decomposition leads to potassium …
ادامه مطلب(PDF) Conversion of phosphogypsum to …
The aim of this process is to produce potassium sulfate, a high-value fertilizer, from sulfate solutions obtained after dissolving …
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K2SO4 production via the double decomposition reaction of …
The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. …
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Process of preparing chloride-free KNS compound …
Request PDF | Process of preparing chloride-free KNS compound fertilizers from phophogypsum waste using a quaternary phase diagram | Phosphogypsum (PG), commonly known as calcium sulfate, is a ...
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Morphology‐Controlled Preparation of α‐Calcium Sulfate …
Phosphogypsum (PG), a by-product of phosphoric acid industry, causes environmental issues. In this paper, PG was effectively transformed into alpha-calcium sulfate hemihydrate (ɑ-CSH) via a semi ...
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The Optimal Conditions of Preparation of Phosphogypsum …
Phosphogypsum (PG) as a by-product was obtained from the production of phosphoric acid [].PG contains CaSO 4 ·2H 2 O mainly and some impurities such as phosphates, fluorides, silicon [], etc.Over 150 million and 10 million tons of PG were produced per year in the world and China, but only 4.3–4.6 % and 2–3 % were reasonably utilized [].A great …
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TENORM: Fertilizer and Fertilizer Production …
Phosphogypsum. Phosphogypsum is the primary waste byproduct of the wet-acid process for producing phosphoric acid. During this process sulfuric acid dissolves phosphate rock creating a …
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Integrated process for potassium sulfate and a mixture …
The process comprises four basic units: preparation of the ore and flotation, production of ite and its recovery, leaching of the ... In this production process, potassium sulfate is ...
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Sustainable process for the preparation of potassium sulfate …
The factors affecting the conversion of potassium chloride to potassium sulfate, such as aqueous ammonia to phosphogypsum ratio, weight percent of isopropanol in the solution, weight percent excess phosphogypsum, and reaction temperature and pressure have also been investigated.The optimum reaction conditions obtained at 25°C and atmospheric ...
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Synergistic preparation and application in PCU of α-calcium sulfate …
Phosphogypsum (PG) is an industrial byproduct primarily composed of calcium sulfate dihydrate (DH, CaSO 4 ·2H 2 O), generated from the wet process production of phosphoric acid. Currently, the ...
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Research of new process preparing potassium sulfate from phosphogypsum
To improve the process of potassium sulphate prepared from phosphogypsum (under study, no product, only method) in ammonia solution, the influence of solvent such as Methanol, Methanol-ammonia on the yield of potassium oxide was studied. The result revealed that the system of ethanol and ammonia was optimal. …
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Process of preparing chloride-free KNS compound …
Phosphogypsum (PG), commonly known as calcium sulfate, is a waste by-product generated during the production of phosphoric acid by the wet phosphoric acid process (WPA). It is well known that every year the phosphate industries produce a large quantity of PG around the world (i.e., Currently, global production of this waste is …
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