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Utilization of natural gypsum for the preparation of ammonium

2023.1.6  The present study aims to synthesize ammonium sulfate from low-grade naturally occurring gypsum found in Rajasthan, India. Ammonium sulfate was prepared by adding a fixed amount of natural gypsum with an appropriate quantity of ammonium

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Fabrication of freeform bone‐filling calcium phosphate

2009.1.14  Abstract. Transformation of gypsum model fabricated by three-dimensional printing (3DP) into hydroxyapatite (HA) by treating in ammonium phosphate solution is

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Ammonium sulfate preparation from phosphogypsum waste

2017.1.1  Preparation procedures. Ammonium sulfate is prepared by stirring a definite amount of impure or purified phosphogypsum with a suitable amount of ammonium

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Phosphogypsum Two-Step Ammonia-Carbonation Resulting in Ammonium ...

2021.10.18  Two synthesis methods were used for the conversion of phosphogypsum to ammonium sulfate and calcium carbonate: (i) Two-step method: it consists of reacting

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Transformation of 3DP gypsum model to HA by treating in ammonium ...

2006.7.12  Commercially available 3DP system can form only gypsum model and not for bioceramics. On the other hand, transformation of hardened gypsum into

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Transformation of 3DP gypsum model to HA by treating in ammonium ...

With the present method, it is possible to transform the fabricated gypsum by 3D printing that is adaptive to the osseous defect into HA prostheses or scaffold. Three-dimensional

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Manufacture of ammonium sulfate fertilizer from FGD-gypsum

1995.12.31  Goal is to assess technical and economic feasibility for producing fertilizer-grade ammonium sulfate from gypsum produced in limestone flue gas

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Fabrication of calcite blocks from gypsum blocks by

2017.3.1  The fabrication of calcite blocks using CaSO 4 2H 2 O and CaSO 4 proposed in this investigation may be a useful method to produce calcite blocks because

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Fabrication of Hydroxyapatite Block from Gypsum Block

INTRODUCTION. Hydroxyapatite (HAP, Cam (PO4 ) 6 (OH) 2 ) has been used widely in medical and dental fields as a bone substitute material because of its good

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Utilization of natural gypsum for the preparation of

2023.4.20  The present study aims to synthesize ammonium sulfate from low-grade naturally occurring gypsum found in Rajasthan, India. Ammonium sulfate was prepared

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Fabrication of Freeform Bone-Filling Calcium Phosphate

2009.8.1  Transformation of gypsum model fabricated by three-dimensional printing (3DP) into hydroxyapatite (HA) by treating in ammonium phosphate solution is possible.

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Effect of Ammonium Chloride Solution on the Growth of Phosphorus Gypsum ...

2016.8.28  The gypsum whisker which grew in different salt solution (Figure 8) was observed after NH 4 Cl solution was added. The whisker of Figure 8(a) grew in KCl solution. The addition of ammonium chloride solution sample into a dendritic whisker made some fine small particles connected to the whisker, resulting in whiskers obtaining elongation.

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Interactive effects of soil amendments (biochar and gypsum)

2020.7.1  Ammonia (NH 3) volatilization is a major route of nitrogen (N) loss from soil, especially in saline soil.Biochar and gypsum are two important soil amendments that are widely used in coastal saline farmland. However, little is known about the interactive effects of soil amendments and salinity on NH 3 volatilization. In this study, five soil salinity

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Fabrication of hydroxyapatite block from gypsum block

ammonium phosphate. Durapatite. Calcium Sulfate. The aim of this study was to evaluate the feasibility of fabricating low-crystalline, porous apatite block using set gypsum as a precursor based on the fact that apatite is thermodynamically more stable than gypsum. When the set gypsum was immersed in 1 mol/L diammonium hydrogen phosphate

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Utilization of natural gypsum for the preparation of ammonium

2023.1.6  Conversion of FGD-gypsum to ammonium sulfate were tested at temperatures between 60 to 70°C for a duration of five to six hours. The results of a literature review and preliminary bench-scale ...

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Fabrication of freeform bone‐filling calcium phosphate ceramics by ...

2009.1.14  Transformation of gypsum model fabricated by three‐dimensional printing (3DP) into hydroxyapatite (HA) by treating in ammonium phosphate solution is possible. However, 3DP powder supplied by the manufacturer contains unknown additives which may be questionable for biomaterials.

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Flotation separation of quartz from gypsum using benzyl

2022.2.1  Mineral samples used were gypsum (Zaozhuang Xianglin Gypsum Powder Company, China) and quartz (Shijiazhuang Chuangwei Mining Company, China). The two mineral samples were crushed, ground and sieved to −74.0 + 38.0 μm and analyzed by X-ray diffraction (XRD) and X-ray fluorescence spectrometer (XRF), as shown in Fig. 1 and

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Fertilizer Granulation Equipment Systems - FEECO

2024.2.13  Founded in 1951 as the Fertilizer Engineering Equipment Company, the name FEECO has become synonymous with fertilizer granulation expertise in every facet – from process development, to equipment design and fabrication, and even parts and service. From single nutrient products to complex fertilizers, our expertise starts in traditional ...

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Fabrication ammonium Gypsum - kulturaszamotuly

Fabrication ammonium Gypsum POUR L’EXPLOITATION MINIÈRE ET L’EXCAVATION DE ROCHE. Notre offre produits propose des solutions pour presque tous types de projets d'exploitation minière et d'excavation de roche. Notre gamme d’équipements et de services pour l'exploitation minière et l'excavation de roche est étudiée afin de maximiser ...

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Applications of Gypsum and Ammonium Sulfate Change Soil

2020.6.15  Calcium sulfate (CS) or gypsum is commonly used on removal of soluble ions such as sodium (Na), however, large applications of CS can affect soil pH, EC, and nutrient availability to plants.

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Fabrication of a Novel Nanofiltration Membrane with ...

2019.11.1  Fabrication of a Novel Nanofiltration Membrane with Enhanced Performance via Interfacial Polymerization through the Incorporation of a New Zwitterionic Diamine ACS Applied Materials Interfaces ( IF 8.3Pub Date : 2019-10-31, DOI: 10.

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Utilization of natural gypsum for the preparation of ammonium

2023.1.6  Ammonium sulfate is used as a fertilizer because it supplies nitrogen and sulfur for plant nutrients. It can be obtained by three processes: as recovery from coke oven, a by-product from caprolactum and gypsum process. Natural gypsum fulfills the demands of the cement industries and is used by farmers as a direct fertilizer for reconditioning of

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The fabrication of all solid-state ammonium ion selective electrodes ...

2017.10.29  Solid state ammonium ion selective electrodes based on two kinds of electro conductive materials, copper and silver, had been successfully synthesized. First, polyaniline had been deposited on the surface of copper and silver by potentiostatic method and cyclic voltammetry respectively, and then ammonium ion selective film was coated

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Kinetics of the conversion reaction of gypsum with ammonium carbonate ...

2018.5.7  Ammonium sulfate can be prepared by the conversion reaction of gypsum with CO 2 and ammonia (Danielik et al., 2018). Except for ammonium sulfate, calcium carbonate is produced as a by-product ...

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Fabrication of freeform bone-filling calcium phosphate

Transformation of gypsum model fabricated by three-dimensional printing (3DP) into hydroxyapatite (HA) by treating in ammonium phosphate solution is possible. However, 3DP powder supplied by the manufacturer contains unknown additives which may be questionable for biomaterials. ... (POP) powder was used for fabrication in the present

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Sustainability Free Full-Text Fabrication of Functional Gypsum ...

2024.4.6  Eggshells can adsorb chemicals, but no studies regarding the adsorption of gaseous chemicals using eggshells or eggshell membranes have been reported. The purpose of this study was to apply chemical adsorption using eggshells to the maintenance of human health. Building materials containing eggshells may reduce the concentrations

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Flotation separation of quartz from gypsum using benzyl

Phosphogypsum is a kind of industrial by-product, which could be used as building materials instead of natural gypsum after removing impurities. Flotation is an effective method to remove the silicon-containing impurity quartz in the phosphogypsum. In this work, a surfactant tetradecyl dimethyl benzyl ammonium chloride (TDBAC) was first used as the

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Fabrication of freeform bone-filling calcium phosphate

A sophisticated application of the present 3DP method to fabricate the freeform bioceramic for osseous defect was attempted, and jaw bone defect filling biomaterial of beta-TCP and scaffold with macroporous structures could be fabricated. Transformation of gypsum model fabricated by three-dimensional printing (3DP) into hydroxyapatite (HA) by treating in

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Glycine-induced synthesis of vaterite by direct aqueous

2022.4.15  The carbonation reaction of gypsum from gas desulfurization was divided into four main stages (Lu et al. 2016; Song et al. 2012): (1) absorption of gas CO 2 in the ammonia solution, (2) formation of ammonium (bi)carbonate, (3) chemical reaction between ammonium (bi)carbonate and gypsum, and (4) precipitation of CaCO 3. The relevant

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Utilization of natural gypsum for the preparation of ammonium

2023.1.6  The dosage of natural gypsum was 100 gm. Design-Expert software was also applied to study the influence of both the operating parameters, and it was analyzed that maximum yield of 43.5% fit well with R ^2 value of 0.96. Therefore, low-grade natural gypsum could be used as effective source for manufacturing ammonium sulfate.

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Novel ammonia recovery from anaerobic digestion by

2023.12.1  The stripped gas reacted with the gypsum solution in this part by recovering ammonia as a form of ammonium bicarbonate or ammonium sulfate, and the rest of the gas discharged through the acid trapwhere capturs the remaining ammonia that was not absorbed in the prior part. under which the reactions producing ammonium sulfate

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Manufacture of ammonium sulfate fertilizer from gypsum

1996.12.31  Costs for constructing and operating a conceptual plant based on a proposed process that converts flue gas desulfurization (FGD)-gypsum to ammonium sulfate fertilizer has been calculated and used to estimate a market price for the product. The average market price of granular ammonium sulfate ($138/ton) exceeds the rough

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(PDF) A Review on Ammono-Carbonation Reactions:

2022.1.1  Ammono-carbonation reac tion of any kind of gypsum (pure, P G or. FGD gypsum) with ammonium carbonate known as Merseb urg Process is used to. produce ammonium sulfate and calcium carbonate. This ...

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Flotation separation of quartz from gypsum using benzyl

2022.2.1  Flotation is an effective method to remove the silicon-containing impurity quartz in the phosphogypsum. In this work, a surfactant tetradecyl dimethyl benzyl ammonium chloride (TDBAC) was first used as the collector of quartz to be separated from gypsum. The flotation behaviors of quartz and gypsum were investigated by micro

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Effect of Ammonium Chloride Solution on the Growth of Phosphorus Gypsum ...

2016.1.1  Pretreated with phosphogypsum as raw materials, K2SO4 as additive, study of the impact of K2SO4 solution with different concentrations on whisker growth of phosphogypsum by the atmos-pheric water ...

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Phosphogypsum Two-Step Ammonia-Carbonation Resulting in Ammonium ...

2021.10.18  Generally, gypsum solubility decreases with increasing temperature. On the other hand, during the reaction between NH 4 OH and CO 2, the heat from the ammonium carbonate formation exothermicity increased the temperature in the phosphogypsum conversion reactor contents by 35 °C , thereby significantly reducing the

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Desulfurization gypsum carbonation for CO2 sequestration

DOI: 10.1016/j.ijggc.2023.103843 Corpus ID: 256383669; Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt @article{Ding2023DesulfurizationGC, title={Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt}, author={Wenjin Ding and Jingyi Qiao

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Manufacture of Ammonium Sulfate Fertilizer from FGD-gypsum

1994.12.1  The overall goal of this project is to assess the technical and economic feasibility for producing feasibility-grade ammonium sulfate from gypsum produced as part of limestone flue gas desulfurization (FGD) processes. This is a cooperative effort among the ISGS, the UIUC, AlliedSignal, SE-ME, Henry Fertilizer, Illinois Power Co. (IP), and

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Flotation separation of quartz from gypsum using benzyl ...

2021.11.18  Flotation separation of quartz from gypsum using benzyl quaternary ammonium salt as Applied Surface Science ( IF 7.392) Pub Date : 2021-11-10, DOI: 10.1016/j.apsusc.2021.151834

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