EFFECT OF AMMONIUM SULFATE AND …
plained by the fact that the solubility of calcium sulfate is not high enough and it takes more time for calcium to appear in an ionic form. Key words: ammonium nitrogen, nitrate nitrogen, hydrolyzed nitrogen, ammonium sulfate, phosphogypsum, mobile phospho-rus, exchangeable potassium, hydrolytic acidity.
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Manufacture of ammonium sulfate from gypsum
ammonium sulfate is manufactured from gypsum by a continuous process in which an aqueous flow of material is continously recycled along a predetermined closed circuit defined by a conduit and a wider vallel connected in series. a fresh aqueous gypsum slurry comprising a dispersion of finely divided gypsum in an ammonium sulfate solution is continuously introduced into the …
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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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Sulfate reduction from phosphogypsum using a mixed culture of sulfate
Phosphogypsum (CaSO 4), a primary by-product of phosphoric acid production, is accumulated in large stockpiles and occupies vast areas of land.It poses a severe threat to the quality of water and land in countries producing phosphoric acid. In this study, the potential of sulfate-reducing bacteria for biodegradation of this sulfur-rich industrial solid waste was …
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Study on The Production of Ammonium Sulfate …
The production of ammonium sulfate fertilizer from phosphogypsum is studied. The phosphogypsum is considered by product from extraction process of sulphoric acid. The mereseberg process is used a waste of phosphogypsum with ammonium carbonate to produce ammonium sulfate as a main product and calcium carbonate as a byproduct. It is a process ...
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SVXP
In foreign practice, technologies for the conversion of phosphogypsum into ammonium sulfate and calcium carbonate developed by OSAG (Austria), FACT (India), Marubeni Juda (Japan) and TVAB ... The first stage is the production of ammonium sulfate or sodium sulfate. The second stage is the production of REE concentrate. The second stage includes ...
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Process simulation of mineral carbonation of phosphogypsum with …
Accordingly, more water needs to be evaporated in the production of ammonium sulfate fertilizer, thereby leading to high energy consumption. The effect of mass ratio of water to phosphogypsum on this pressured phosphogypsum carbonation process is evaluated by increasing the mass flow of initial inputted water with the mass ratio of water to ...
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Synergistic preparation and application in PCU of α-calcium sulfate …
Introduction. 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 global annual production of PG is approximately 2.8 million tons, and it can be utilized as a soil conditioner, for the production of ammonium sulfate, …
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Mineral Carbonation of Phosphogypsum Waste for …
Phosphogypsum Waste for Production of Useful Carbonate and Sulfate Salts. Front. Energy Res. 3:48. ... ammonium sulfate as a reagent, even though the AS can largely be
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Reaction parameter optimization of ammonium sulfate …
Phosphogypsum (PG), by-product of wet process phosphoric acid production, has a high recycle and reuse potential within the scope of compliance with CE strategies. This study offers a …
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Sequence closed-loop recovery of fluoride, phosphate, and sulfate …
Phosphogypsum (PG) is a large-scale industrial by-product generated during the production of phosphoric acid, typically being deposited in landfills worldwide. The leaching of fluoride (F −), phosphate (PO 4 3−), and sulfate (SO 4 2−) anions from PG into water bodies through rainfall results in significant environmental pollution. Herein ...
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Preparation of ammonium sulfate and calcium carbonate …
With the continuous decline in phosphate rock grade,the enterprises of phosphate compound fertilizers have to face the use of low-grade phosphate ore.In order to solve the problem of accumulation of phosphogypsum,which is a byproduct in the process of nitrophosphate production by freezing method,using phosphogypsum,ammonium carbonate and ammonia …
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Ammonium Sulfate (ZA) | PDF | Ammonia | Fertilizer
The document describes a study on producing ammonium sulfate fertilizer from phosphogypsum waste. The Merseberg process is used, which involves reacting phosphogypsum with ammonium carbonate to produce ammonium sulfate and calcium carbonate. Experiments were conducted to determine optimum reaction conditions, finding …
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Study on The Production of Ammonium Sulfate Fertlizer …
We describe herein a detailed study on the effect of molar ratio MR = n (OH−)/n (Ca2+) on the Phosphogypsum (PG) waste ammonia-carbonation process. The use of an aqueous NH3 …
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The effects of ammonium sulfate application on methane emission …
Sulfate-containing fertilizers are known to decrease CH 4 emission as a result of competition between sulfate-reducing bacteria and methanogens for hydrogen and acetate substrates (Schütz et al., 1989, Hori et al., 1990, Hori et al., 1993). Although ammonium sulfate (AS) causes rice root rot by production of hydrogen sulfide, it may effectively affect rice …
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Ammonium Sulfate
Ammonium sulfate is used as a fertilizer providing nitrogen and sulfur needed by plants, especially in soils with high pH. The main method of producing ammonium sulfate is the reaction between ammonia and sulfuric acid. Technical Specifications: Phosphogypsum is the waste of phosphoric acid production, the majority of which is calcium sulfate.
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A study on the new production process for potassiam sulfate …
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 optimal condtions were found. Under …
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Method for producing ammonium sulphate with phosphogypsum …
The invention discloses a method using phosphogypsum as the raw material to produce ammonium sulfate, and the method comprises steps as follows: 1750 shares of crude phospho gypsum which contains 20 percent of free water is taken, and 2 to 5 percent of the amount of the crude phospho gypsum of activator is added the aging for 2 to 8 days; then, a reaction tank …
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(PDF) Effect of ammonium sulfate and phosphogypsum …
Effect of ammonium sulfate and phosphogypsum application on nutrients dynamics and acidity of black soil Elina Zakharchenko 2020, Vìsnik Sumsʹkogo nacìonalʹnogo agrarnogo unìversitetu
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Production of ammonium sulfate and calcium carbonate
A process for the manufacture of ammonium d sulfate and slime-free calcium carbonate, which comprises reacting an aqueous slurry of calcium sulfate and an aqueous solution of ammonium carbonate in three stages in the presence of -a minor quantity of ammonium bicarbonate, said reaction zones being of progressively larger size and of decreasing ...
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Mineral Carbonation of Phosphogypsum Waste for …
Phosphogypsum Waste for Production of Useful Carbonate and Sulfate Salts. Front. Energy Res. 3:48. doi: 10.3389/fenrg.2015.00048 Mineral carbonation of ... converted to ammonium sulfate [(NH 4) 2SO 4] with ammonia (NH 3) and CO 2, also solid calcium carbonate (CaCO 3) is generated. The ammonium sulfate can be utilized as a
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Process simulation of mineral carbonation of …
In enhanced phosphogypsum carbonation, water is used as a solvent for dissolving the ammonia, producing the ammonium sulfate, and dissociating phosphogypsum with a fast …
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Ammonium sulfate preparation from phosphogypsum …
The obtained ammonium sulfate product has a percent of purity equals 95%. The flow sheet for the highly purified ammonium sulfate production from phosphogypsum sample is constructed. References Fig. 14. Formulated flowsheet for the production of highly purified ammonium sulfate fertilizer from phosphogypsum sample.
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Mineral Carbonation of Phosphogypsum Waste for Production …
The ammonium sulfate can be utilized as a fertilizer or in other mineral carbonation processes that use magnesium silicate-based rock as feedstock, while calcium carbonate has various uses as e.g. filler material. ... @article{Mattila2015MineralCO, title={Mineral Carbonation of Phosphogypsum Waste for Production of Useful Carbonate and Sulfate ...
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High Valuable Materials from Phosphogypsum and …
production of ammonium sulfate. Results and Discussion Phosphogypsum (PG) was chemically and mineralogical characterized By the XRF analysis shown in table (1). Table 1: shows the main constituents of (PG): Main constituents Wt% SiO 2 10.3 TiO 2 0.03 2O3 0.27 Fe 2O3 Total 0.13 CaO 29.8 Na 2O 0.15 P2O5 1.3 SO 3 45.4 F 0.21 Main constituents Wt%
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Study on The Production of Ammonium Sulfate Fertlizer …
From results of laboratory experiments the temperature of ammonium sulfate preparation is done in 23Co and the ratio of phosphogypsum to ammonium carbonate (400ml /192 gm …
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Reaction parameter optimization of ammonium sulfate production …
Phosphogypsum (PG), by-product of wet process phosphoric acid production, has a high recycle and reuse potential within the scope of compliance with CE strategies. This study offers a straightforward, two-step solid/liquid heterogenous reaction sequence, providing the conversion of PG to ammonium sulfate (AS). Experiments were conducted in accordance with the OFAT …
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The effects of ammonium sulfate application on methane emission …
Sulfate-containing fertilizers are known to decrease CH 4 emission as a result of competition between sulfate-reducing bacteria and methanogens for hydrogen and acetate substrates (Schütz et al., 1989, Hori et al., 1990, Hori et al., 1993).Although ammonium sulfate (AS) causes rice root rot by production of hydrogen sulfide, it may effectively affect rice …
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Chemical Processing of Phosphogypsum for …
for utilizing phosphogypsum include the following: 1. Production of ammonium sulphate by reaction of gypsum with ammonia and carbon dioxide. 2. Use of phosphogypsum as a fertilizer filler. 3. Direct application of phosphogypsum to farmland when the soil requires it. 4. Use of phosphogypsum to create off-shore recreational islands.
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Complex Nitrogen-phosphorus-sulfur-containing …
The chemical industry of Uzbekistan has all the prerequisites for creating the production of complex (nitrogen-phosphorus, nitrogen-phosphorus-potassium, nitrogen-phosphorus-sulfur-containing and others) fertilizers based on ammonium nitrate (AN). Phosphogypsum (PG), a waste product from the
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