(PDF) Phosphogypsum Processing Method

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 …

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Process of preparing chloride-free KNS compound fertilizers from

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 …

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Comparative study of K2SO4 production by wet conversion from

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: …

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Preparation of α-hemihydrate gypsum whiskers from phosphogypsum …

Phosphogypsum (PG) emerges as by-product during the wet preparation of phosphoric acid[1]. ... potassium sulfate, as well as some sulfur-based products[13]. …

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Production of potassium sulfate from KCl and …

K 2 SO 4 has been studied at 25 • C and 0.0 bar gauge using a 33 wt.% ammonia solution (with Fig. 7. Effect of ammonia solution to phosphogypsum ratio on the production of potassium sulfate at ...

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US4504458A

reaction (14) when phosphogypsum is slurried with water and brought into contact at low pH with a chloride-loaded anion exchanger, the reaction (14) will start, and along with the removal of …

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(PDF) Conversion of phosphogypsum to potassium sulfate and …

The factors affecting the conversion of potassium chloride to potassium sulfate, such as aqueous ammonia to phosphogypsum ratio, weight percent of isopropanol in the …

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Conversion of phosphogypsum to potassium sulfate and …

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 …

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Continuous and simultaneous conversion of Moroccan phosphogypsum …

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 …

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Solubility of potassium sulfate in aqueous isopropanol as a …

The energy of activation in this case was estimated to be 58.5 kJ/mol. Abu-Eishah [10] studied the production of potassium sulfate from potassium chloride and phosphogypsum using aqueous …

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

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

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Status and development trends of phosphogypsum utilization in …

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 …

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(PDF) Conversion of phosphogypsum to potassium sulfate: Part I.

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

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Producing Potassium Sulfate from Phosphogypsum and Potassium …

In this paper, some technical conditions of producing potassium sulfate with phosphogypsum and potassium chloride by adding proper solvent are studied.Some main variables affecting the …

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Effect of temperature on the solubility 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 ...

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Temperature effect on phosphogypsum conversion into potassium

The effect of temperature on phosphogypsum conversion was evidenced reacting a high concentration of phosphogypsum waste (1.3 M) with potassium hydroxide to produce …

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Preparation of Phosphogypsum–Bentonite-Based Slow-Release Potassium

Potassium Magnesium Sulfate Fertilizer Release Behavior in the Column Leaching Study Figure 4 illustrates the nutrient release from different coating components at various …

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Properties, Purification, and Applications of Phosphogypsum: A

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 …

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Solubility of potassium sulfate in aqueous isopropanol as a …

Effect of excess phosphogypsum on the production of potassium sulfate at 25 • C, 1 atm, 33% ammonia, 7% isopropanol, 4.32:1 ammonia solution to phosphogypsum ratio, and mixer …

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Phosphogypsum circular economy considerations: A critical …

This procedure leads to the production of considerable amounts of hydrated calcium sulfate, commonly referred to as PG (see simplified mass balance in Fig. 1). In …

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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 …

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"Treating Waste with Waste": Utilizing Phosphogypsum to …

Phosphogypsum is a by-product of the wet-process phosphoric acid production, and it is rich in Ca and S. Long-term storage of Phosphogypsum can cause serious pollution to …

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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 …

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(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...

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Effect of modifiers on crystalizing habit and mechanical strength …

Phosphogypsum (PG) is a kind of solid waste residue, which is produced during phosphoric acid manufactured with phosphate rock by the wet process, it' main composition is …

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Research Progress on Pretreatment and Comprehensive …

The research progress of comprehensive utilization of phosphogypsum is introduced, including the production of sulfuric acid, calcium sulfate whiskers, potassium …

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Production of glaserite and potassium sulphate from gypsum and

Interest in potassium sulphate stems mainly from its use as a potash fertilizer for crops which are sensitive to chlorides. This fertilizer is usually manufactured by double …

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Continuous and simultaneous conversion of Moroccan phosphogypsum …

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 …

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Process of preparing chloride-free KNS compound fertilizers from

Traditionally, the large proportion of the world production of K 2 SO 4 is based on the reaction of potassium chloride with sulfuric acid according to Mannheim process …

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