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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The paper discusses process conditions of preparing potassium sulfate with phosphogypsum by one-step process.The best process factors are obtained by …
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Preparation of potassium sulphate Potassium sulphate is a white crystalline soluble in water. In common organic solvents, it is insoluble. Potassium sulphate can be prepared by the protolytic reaction of potassium hydroxide with sulphuric acid according to the chemical equation 2 KOH(aq) + H 2 SO 4 (aq) ⎯→ K 2 SO 4
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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 …
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Research on Two-step Conversion Process to Make Potassium Sulfate from Phosphogypsum. Dengqi Li. Published 2015. Chemistry. Sulphur Phosphorus & Bulk …
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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‐liquid method. The phase evolution and the effects of different organic acids and pH values on crystal morphology of the α‐CSH were …
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Keywords: Potassium Sulphate; Phosphogypsum; CO2 Sequestration; Mineral Carbonation; Calcium Carbonate. ... This process of the final products with very little commercial value, and therefore is ...
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The process of potassium sulfate crystallization from aqueous solutions in the presence of organic modifiers containing phosphonic, phosphate, sulfonic, sulfate and carboxyl functional groups has ...
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[20−24] Table 1 Main technology of phosphogypsum preparation of β-hemihydrate gypsum [20−24] [25,26] [31] 。 ... This process aims to produce potassium sulfate (K2SO4), a high-value ...
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DOI: 10.1016/j.psep.2023.07.037 Corpus ID: 260042788; Process of preparing chloride-free KNS compound fertilizers from phophogypsum waste using a quaternary phase diagram @article{Bouargane2023ProcessOP, title={Process of preparing chloride-free KNS compound fertilizers from phophogypsum waste using a quaternary phase …
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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 …
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In this present work, the transformation of the Moroccan phosphogypsum (PG) waste, considered as a potential source of sulfate, into potassium sulfate compound could …
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The detailed manufacturing process and study strategy were described in Fig. 2, where the preparation of ESPSC pastes contained two steps, i.e., original phosphogypsum modification and new cementitious material fabrication.A mix of fresh phosphogypsum, slag, and cement with a proportion of 94:2:4 was wet-milled firstly for …
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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 …
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Potassium sulfate is an inorganic compound commonly used in chemistry.It consists of potassium (K), sulfur (S), and oxygen (O) atoms, forming the chemical formula K₂SO₄. This compound appears as a white, crystalline solid and is highly soluble in water. In the world of compounds, potassium sulfate plays a vital role as a …
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The process of potassium sulfate crystallization from aqueous solutions in the presence of organic modifiers containing phosphonic, phosphate, sulfonic, sulfate and carboxyl functional groups...
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A new preparing process for K 2SO 4 from (NH 4) 2SO 4 was developed. The effects of the raw material mole ratio, reaction temperature,crystal temperature, time and crystal improver on the comversion of the raw material and the compoisition of products were studied through orthogonal experiment and individual experiments. Meanwhile, the …
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The WPA process with sulfuric acid makes it possible to obtain PG in the form of a dihydrate (CaSO 4 ·2H 2 O) while other processes lead to the production of a hemi-hydrate (CaSO 4 ·0.5H 2 O) or an anhydrite (CaSO 4).The attack of one t phosphate rock is usually done with 0.6 t of concentrated sulfuric acid that generates approximately …
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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 conditions for this process are determined. It is shown that in an aqueous medium at a temperature of 20 °C, a stoichiometric ratio of the initial ...
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Abstract Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product ... (ammonium sulphate, potassium sulphate, urea, sodium sulphate and calcium carbonate) (Ennaciri et al. 2016;IFA 2018). ... The wet process is still the most popular one because it is economical and has been proven adaptable to various types of phosphate …
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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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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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This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
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Phosphogypsum origin the solid waste discharged from the production of phosphoric acid. The main component is calcium sulfate dihydrate, as well as incompletely decomposed phosphate rock, residual phosphoric acid, fluoride, organic matter and so on. On the one hand, phosphogypsum is the key component of PPSC and the major …
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Abstract—The possibility of obtaining potassium sulfate by converting calcium sulfate (phosphogypsum) and potassium chloride in an ammonia solution was investigated. The …
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Analytical grade glycerol (C 3 H 8 O 3), sodium sulfate (Na 2 SO 4) and citric acid (C 6 H 8 O 7 ·H 2 O) were purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd., China. PG was collected from a phosphate fertilizer plant in Guizhou Province, China. The X-ray diffraction (XRD) (X'Pert PRO, PANalytical Company, Netherlands) …
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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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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 ...
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The main mineral phase of the raw phosphogypsum was characterized by X-ray diffraction analysis. As shown in Fig. 2 b, the XRD results confirmed that the mainly composed of phosphogypsum is calcium sulfate CaSO 4 ·2H 2 O The major peaks of CaSO 4 was identified at 11.71°, 20.80°, 23.44° and 29.16°, while some minor peaks …
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Decomposition of phosphogypsum by potassium carbonate in aqueous solution Based on the previous works relative to the decomposition of the phosphogypsum by liquid route, we combined the reaction of preparing K2 SO4 from the phosphogypsum and KCl and the reaction of preparing (NH4 )2 SO4 from the phosphogypsum, the carbon dioxide …
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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.
WhatsApp: +86 18221755073