Conversion of phosphogypsum to potassium sulfate

In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered a potential source of sulfate, into potassium sulfate compound could help …

Production of Potassium Sulphate by Conversion of …

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.

(PDF) Phosphogypsum Processing Method

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 ...

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 ...

Preparation of gypsum with high purity and whiteness from phosphogypsum

Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2.The widespread deposition of that fine, light- to dark-grey, powder with a slight odor and ...

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 ...

CONVERSION OF PHOSPHOGYPSUM TO POTASSIUM …

Solubility of calcium sulfate in concentrated aqueous chloride solutions is of particular significance in chloride hydrometallurgy and various crystallization processes, such as the production of …

Conversion of phosphogypsum to potassium sulfate …

solution containing the phosphogypsum and the ammonia water [7]. We can schematize this chemical reaction by the following reaction equation: CaSO 4,2H 2O + (NH 4) 2CO 3 → (NH 4) 2SO 4 + CaCO 3 + 2H 2O. Synthesis of potassium sulfate For its utility in the cultures of high quality, the potassium sulphate is a very important potash. It is ...

(PDF) Conversion of Moroccan Phosphogypsum to …

In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered as a potential source of sulfate, into potassium sulfate compound could help to reduce …

Continuous and simultaneous conversion of Moroccan phosphogypsum …

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 ...

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. The solubility of …

(PDF) Conversion of phosphogypsum to …

The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of phosphogypsum in aqueous solutions ...

(PDF) Conversion of Moroccan Phosphogypsum to 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 ...

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. The solubility of phosphogypsum in aqueous solutions of KCl, HCl, and mixtures of both has been first measured at various temperatures and concentrations. The factors affecting the conversion of ...

Production of potassium sulphate by conversion of phosphogypsum …

This work shows the possibility of obtaining potassium sulfate by converting phosphogypsum and potassium carbotane by the reaction CaSO 4 + K 2 CO 3 → ↓ CaCO 3 + K 2 SO 4 . The optimal ...

Comparative study of K2SO4 production by wet conversion …

Potassium sulfate K 2 SO 4 (arcanite) is a type of simple potash fertilizer used especially for high quality cultivation. It allowed bringing to plants two essential nutrients: …

K 2SO 4 production via the double decomposition reaction of …

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 ...

Preparation of α-hemihydrate gypsum whiskers from phosphogypsum …

α-calcium sulfate hemihydrate (α-CSH) is a green building material. The synthesis of α-CSH from industrial phosphogypsum (PG) in Na 2 SO 4 solution is a promising technique, but Na impurity may be introduced into α-CSH crystal. In this study, the doping behavior of Na into α-CSH was investigated, and the occurrence state of Na in α-CSH ...

Process of preparing chloride-free KNS compound fertilizers …

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 estimated at 300 Mt/ year), but the …

(PDF) K 2SO 4 production via the double …

The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of phosphogypsum in aqueous solutions ...

Status and development trends of phosphogypsum …

Phosphogypsum (PG) is a byproduct of the wet phosphoric acid process, with calcium sulfate as its primary component. Approximately 4.5–5.0 t of PG are generated per ton of phosphoric acid produced (Li & Gu, 2016).Globally, the cumulative stockpiles of PG have reached 6 billion t, with an annual increase of 200 million t (Ou et al., 2021).By the end of 2020, PG …

Conversion of phosphogypsum to potassium sulfate

Solubility of calcium sulfate in concentrated aqueous chloride solutions is of particular significance in chloride hydrometallurgy and various crystallization processes, such as the production of …

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 ...

Research on Two-step Conversion Process to Make Potassium Sulfate …

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-step reaction is reaction temperature 35 ℃, reaction duration approximately more than 90 min, n( Ca SO4) /n( 2NH4HCO3) is 0. 9,where the phosphogypsum conversion η( SO2-4) is up to 59. 86%; The …

(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.

Conversion of phosphogypsum to potassium …

It is also possible to produce potassium sulfate by double decomposition of potassium chloride and phosphogypsum in aqueous ammonia solution at room temperature. The reaction is proposed by Fernandez and al [9]: CaSO4, 2H2 …

Phosphogypsum: Properties and Potential Use in Agriculture

The manufacturing of fertilizers (ammonium sulphate, potassium sulphate, urea, sodium sulphate and calcium carbonate) ... Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. ...

(PDF) Utilization of phosphogypsum in CO2 mineral …

The obtained results show the high efficiency of portlandite Ca(OH)2 resulting from the dispersion of phosphogypsum in alkaline potash solution followed by releasing of potassium sulphate as a co ...

Process of preparing chloride-free KNS compound fertilizers …

In certain cases, potassium sulfate K 2 SO 4 that provides a lower Salt Index, is often preferred over potassium chloride for some chloride-sensitive crops or chloride-rich ... Conversion of phosphogypsum to potassium sulfate: Part I. The effect of temperature on the solubility of calcium sulfate in concentrated aqueous chloride solutions. J ...

Valorization of sodium sulfate waste to 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 ...

Temperature effect on phosphogypsum conversion into potassium …

Biochars showed relatively higher potassium (4.2–12.7%) and sulfur (13.3–17.8%) contents than phosphogypsum (potassium − 0.02% and sulfur − 12.5%). In addition, leachable fraction of ...

K2SO4 production via the double decomposition reaction of KCl …

The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ammonia and isopropanol has been investigated. The solubility of phosphogypsum in aqueous solutions of KCl, HCl, and mixtures of both has been first measured at various temperatures and concentrations. The factors affecting the conversion of ...

-Solubility of potassium sulfate in water and its predicted

Download scientific diagram | -Solubility of potassium sulfate in water and its predicted concentrations as a function of temperature [16]. from publication: Comparative study of K2SO4 production ...

Conversion of phosphogypsum to potassium sulfate

Solubility of calcium sulfate in concentrated aqueous chloride solutions is of particular significance in chloride hydrometallurgy and various crystallization processes, such as the production of potassium sulfate from phosphogypsum and potassium chloride. This paper examines an example of the second type of application in which gypsum and potassium …

CONVERSION OF PHOSPHOGYPSUM TO POTASSIUM …

Ammonium and potassium sulfate In the hemihydrate or dehydrate state, it is used aiming to recover the SO 4 content in manufacturing of ammonium or potassium sulfate by the double de-composition ...

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. Meanwhile, the process of potassium …