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Patrick Sharrock - One of the best experts on this subject based on the ideXlab platform.
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Production of Sodium Dihydrogen Phosphate Using Sodium Chloride and Orthophosphoric Acid
Industrial and engineering chemistry research, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Up-to-date, standard synthesis processes of sodium phosphates are based on the neutralization of Orthophosphoric Acid by sodium hydroxide or sodium carbonate. To the best of our knowledge, the reaction between sodium chloride and Orthophosphoric Acid has not yet been reported in the literature. This study demonstrated the feasibility of the synthesis of sodium dihydrogen phosphate by the reaction of sodium chloride with Orthophosphoric Acid. A detailed parametric study was done, wherein the influence of reaction temperature, air flow rate, water addition flow rate, and reaction time was investigated. As expected, the evacuation of hydrogen chloride (HCl) was crucial for getting high conversion of NaCl to HCl. The highest conversion of NaCl to HCl reached 91% after 24 h of synthesis reaction. Sodium dihydrogen phosphate (NaH2PO4) was the main product. Pyrophosphate (P2O74-) was only formed at trace amounts, and any trace of trimetaphosphate (P3O93-) was observed.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and the Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Sodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and The Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:International audienceSodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field
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calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead ii from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Abstract Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 °C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4·2H2O), monetite (CaHPO4) and MCPM (Ca(H2PO4)2·H2O) were found to be more active than hydroxyapatite (Ca10(PO4)6(OH)2) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb10(PO4)6(OH)2) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents.
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Calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead(II) from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4 center dot 2H(2)O), monetite (CaHPO4) and MCPM (Ca(H2PO4)(2)center dot H2O) were found to be more active than hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb-10(PO4)(6)(OH)(2)) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents. (C) 2014 Elsevier B.V. All rights reserved.
Doan Pham Minh - One of the best experts on this subject based on the ideXlab platform.
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Production of Sodium Dihydrogen Phosphate Using Sodium Chloride and Orthophosphoric Acid
Industrial and engineering chemistry research, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Up-to-date, standard synthesis processes of sodium phosphates are based on the neutralization of Orthophosphoric Acid by sodium hydroxide or sodium carbonate. To the best of our knowledge, the reaction between sodium chloride and Orthophosphoric Acid has not yet been reported in the literature. This study demonstrated the feasibility of the synthesis of sodium dihydrogen phosphate by the reaction of sodium chloride with Orthophosphoric Acid. A detailed parametric study was done, wherein the influence of reaction temperature, air flow rate, water addition flow rate, and reaction time was investigated. As expected, the evacuation of hydrogen chloride (HCl) was crucial for getting high conversion of NaCl to HCl. The highest conversion of NaCl to HCl reached 91% after 24 h of synthesis reaction. Sodium dihydrogen phosphate (NaH2PO4) was the main product. Pyrophosphate (P2O74-) was only formed at trace amounts, and any trace of trimetaphosphate (P3O93-) was observed.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and the Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Sodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and The Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:International audienceSodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field
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calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead ii from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Abstract Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 °C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4·2H2O), monetite (CaHPO4) and MCPM (Ca(H2PO4)2·H2O) were found to be more active than hydroxyapatite (Ca10(PO4)6(OH)2) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb10(PO4)6(OH)2) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents.
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Calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead(II) from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4 center dot 2H(2)O), monetite (CaHPO4) and MCPM (Ca(H2PO4)(2)center dot H2O) were found to be more active than hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb-10(PO4)(6)(OH)(2)) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents. (C) 2014 Elsevier B.V. All rights reserved.
Ange Nzihou - One of the best experts on this subject based on the ideXlab platform.
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Production of Sodium Dihydrogen Phosphate Using Sodium Chloride and Orthophosphoric Acid
Industrial and engineering chemistry research, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Up-to-date, standard synthesis processes of sodium phosphates are based on the neutralization of Orthophosphoric Acid by sodium hydroxide or sodium carbonate. To the best of our knowledge, the reaction between sodium chloride and Orthophosphoric Acid has not yet been reported in the literature. This study demonstrated the feasibility of the synthesis of sodium dihydrogen phosphate by the reaction of sodium chloride with Orthophosphoric Acid. A detailed parametric study was done, wherein the influence of reaction temperature, air flow rate, water addition flow rate, and reaction time was investigated. As expected, the evacuation of hydrogen chloride (HCl) was crucial for getting high conversion of NaCl to HCl. The highest conversion of NaCl to HCl reached 91% after 24 h of synthesis reaction. Sodium dihydrogen phosphate (NaH2PO4) was the main product. Pyrophosphate (P2O74-) was only formed at trace amounts, and any trace of trimetaphosphate (P3O93-) was observed.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and the Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:Sodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field.
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Sodium Dihydrogen Phosphate Starting From Sodium Chloride and Orthophosphoric Acid Via Cation Resin Exchange
Phosphorus Sulfur and Silicon and The Related Elements, 2015Co-Authors: Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:International audienceSodium phosphates are generally synthesized by neutralization of Orthophosphoric Acid with sodium hydroxide. In this paper, we communicate a new synthesis process, wherein sodium dihydrogen phosphate can be obtained from sodium chloride and Orthophosphoric Acid, using cation resin exchange at room operational conditions. This opens a new concept for the design of environmentally friendly processes in this inorganic synthesis field
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calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead ii from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Abstract Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 °C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4·2H2O), monetite (CaHPO4) and MCPM (Ca(H2PO4)2·H2O) were found to be more active than hydroxyapatite (Ca10(PO4)6(OH)2) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb10(PO4)6(OH)2) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents.
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Calcium phosphate based materials starting from calcium carbonate and Orthophosphoric Acid for the removal of lead(II) from an aqueous solution
Chemical Engineering Journal, 2014Co-Authors: Doan Pham Minh, Ange Nzihou, Ngoc Dung Tran, Patrick SharrockAbstract:Calcium phosphates starting from calcium carbonate and Orthophosphoric Acid as unconventional and low cost initial reactants were investigated in the removal from aqueous solution of lead(II) as model heavy metal. Sorbent in gel form, which was directly obtained from the reaction of calcium carbonate powder and Orthophosphoric Acid, and sorbent in powder form, which was obtained by filtration and drying of the gel at room temperature showed the highest reactivity for the removal of lead(II). The sorption capacity could reach up to 1226 mg of lead(II) per gram of powder sorbent. On the other hand, the conventional drying overnight at 105 C decreased the reactivity of the sorbent in powder form. The intermediates of the reaction between calcium carbonate and Orthophosphoric Acid, including brushite (CaHPO4 center dot 2H(2)O), monetite (CaHPO4) and MCPM (Ca(H2PO4)(2)center dot H2O) were found to be more active than hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) which was the final stable product of the reaction between calcium carbonate and Orthophosphoric Acid. Lead hydroxyapatite (Pb-10(PO4)(6)(OH)(2)) was the main crystalline phase formed from the contact of calcium phosphate based sorbents with lead(II) nitrate solution. It was only formed at the external surface or surface of open-pores of calcium phosphate particles, highlighted by SEM characterization. The results obtained open new prospects for the design of efficient orthophosphate-based sorbents for the removal of lead(II) and other heavy metals from liquid effluents. (C) 2014 Elsevier B.V. All rights reserved.
Jocelyn Ramaroson - One of the best experts on this subject based on the ideXlab platform.
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One-Step Synthesis of Sodium Trimetaphosphate (Na3P3O9) from Sodium Chloride and Orthophosphoric Acid
Industrial & Engineering Chemistry Research, 2012Co-Authors: Doan Pham Minh, Ange Nzihou, Jocelyn Ramaroson, Patrick SharrockAbstract:One-step thermal synthesis of sodium trimetaphosphate (STM) from sodium chloride and 85 wt % Orthophosphoric Acid as starting materials was investigated. The reaction temperature and volume-mean diameter of sodium chloride influenced strongly the elimination of chloride and the selectivity in STM. STM of high quality (99%) was obtained at 600 °C from fine powder of sodium chloride. Hydrochloric Acid was the only byproduct of the reaction.
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One-Step Synthesis of Sodium Trimetaphosphate (Na3P3O9) from Sodium Chloride and Orthophosphoric Acid
Industrial and engineering chemistry research, 2012Co-Authors: Doan Pham Minh, Ange Nzihou, Jocelyn Ramaroson, Patrick SharrockAbstract:One-step thermal synthesis of sodium trimetaphosphate (STM) from sodium chloride and 85 wt % Orthophosphoric Acid as starting materials was investigated. The reaction temperature and volume-mean diameter of sodium chloride influenced strongly the elimination of chloride and the selectivity in STM. STM of high quality (99%) was obtained at 600 degrees C from fine powder of sodium chloride. Hydrochloric Acid was the only byproduct of the reaction.
Przemysław Kwolek - One of the best experts on this subject based on the ideXlab platform.
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Orthophosphoric Acid solutions of sodium orthovanadate, sodium tungstate, and sodium molybdate as potential corrosion inhibitors of the Al_2Cu intermetallic phase
Journal of Solid State Electrochemistry, 2019Co-Authors: Przemysław Kwolek, Kamil Dychtoń, Maciej PytelAbstract:Orthophosphoric Acid solutions of sodium orthovanadate, sodium tungstate, and sodium molybdate are tested as potential corrosion inhibitors of the Al_2Cu intermetallic phase. Corrosion inhibition is observed for 0.2 M solutions of Na_3VO_4 and Na_2WO_4 by increasing the pH to > 2. When the pH is < 2, the aforementioned salts increase the corrosion rate of the intermetallic phase. A 0.2 M solution of Na_3VO_4 causes the precipitation of vanadium phosphate on the surface of the Al_2Cu phase at pH = 1.
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spectrophotometric study of corrosion inhibition of aluminium in Orthophosphoric Acid aqueous solutions by using sodium molybdate
Corrosion Engineering Science and Technology, 2019Co-Authors: Marek Wojnicki, Przemysław KwolekAbstract:ABSTRACTThe kinetics of the corrosion of aluminium in the Orthophosphoric Acid aqueous solution was investigated spectrophotometrically and gravimetrically. Sodium molybdate was applied as the inhibitor of the corrosion process. The analysis of the results obtained indicated that there are at least two species that might be useful for the inhibition of the corrosion. These are the products from the reduction of molybdophosphoric Acid with aluminium. The mechanism of the inhibition of the corrosion depends on the initial concentration of sodium molybdate.
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Spectrophotometric study of corrosion inhibition of aluminium in Orthophosphoric Acid aqueous solutions by using sodium molybdate
Corrosion Engineering Science and Technology, 2018Co-Authors: Marek Wojnicki, Przemysław KwolekAbstract:The kinetics of the corrosion of aluminium in the Orthophosphoric Acid aqueous solution was investigated spectrophotometrically and gravimetrically. Sodium molybdate was applied as the inhibitor of...
