Separation of calcium chloride from waste acidic raffinate in HCl wet process for phosphoric acid manufacture: Simulated and experimental study

Lv, Li; Liao, Hang; Zhang, Tao; Tang, Shengwei; Liu, Weizao

doi:10.1016/j.jece.2022.108076

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Proper mixing promotes the uniform dispersion of precursors, resulting in more homogeneous nanoparticles. The solvent being in wet chemical precipitation can also affect the reaction kinetics [ 23 ], solubility of precursors, and crystal growth.…”

Section: Synthesis Strategies For Calcium Phosphate-based Nanomaterialsmentioning

confidence: 99%

Calcium Phosphate-Based Nanomaterials: Preparation, Multifunction, and Application for Bone Tissue Engineering

Chen

et al. 2023

Molecules

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Calcium phosphate is the main inorganic component of bone. Calcium phosphate-based biomaterials have demonstrated great potential in bone tissue engineering due to their superior biocompatibility, pH-responsive degradability, excellent osteoinductivity, and similar components to bone. Calcium phosphate nanomaterials have gained more and more attention for their enhanced bioactivity and better integration with host tissues. Additionally, they can also be easily functionalized with metal ions, bioactive molecules/proteins, as well as therapeutic drugs; thus, calcium phosphate-based biomaterials have been widely used in many other fields, such as drug delivery, cancer therapy, and as nanoprobes in bioimaging. Thus, the preparation methods of calcium phosphate nanomaterials were systematically reviewed, and the multifunction strategies of calcium phosphate-based biomaterials have also been comprehensively summarized. Finally, the applications and perspectives of functionalized calcium phosphate biomaterials in bone tissue engineering, including bone defect repair, bone regeneration, and drug delivery, were illustrated and discussed by presenting typical examples.

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Section: Synthesis Strategies For Calcium Phosphate-based Nanomaterialsmentioning

confidence: 99%

Calcium Phosphate-Based Nanomaterials: Preparation, Multifunction, and Application for Bone Tissue Engineering

Chen

et al. 2023

Molecules

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“…Ammonium phosphate (AP) fertilizers are the most widely used nitrogen–phosphorus binary compound fertilizers, which are prepared by neutralizing wet-process phosphoric acid (WPA) with ammonia gas. Currently, WPA is derived from digestion of phosphate rock by sulfuric acid . The reaction is shown in eq .…”

Section: Introductionmentioning

confidence: 99%

Viscosity Formation Mechanism and Viscosity Reduction Strategy for Ammoniated Slurry of Nitrophosphate Fertilizer

Yin

Tang

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Wet-process phosphoric acid (WPA) preparation by the nitric acid method (WPA-HNO 3 ) is a green technology with broad development prospects. However, in the process of preparing nitrophosphate fertilizer (NP) by WPA-HNO 3 ammonification, the NP ammoniated slurry has high viscosity and poor fluidity, resulting in the shutdown of the production process. There is an urgent problem in NP production to study the formation mechanism of the high viscosity slurry and provide effective guidance for reducing the viscosity. In this paper, based on the composition of actual WPA-HNO 3 in NP production, the equilibrium species variation with pH in the ammoniated slurry was simulated by using HSC software. The viscosity and composition of the NP slurry and the hygroscopicity and microtopography of the solid products were analyzed. The mechanism of viscosity formation and the strategy of viscosity reduction were proposed. The results showed that the micron-scale CaHPO 4 formed in the NP slurry provided nucleation sites for the crystallization of the soluble ammonium salt, which promoted the precipitation of unsaturated NH 4 NO 3 and NH 4 H 2 PO 4 in large quantities. The strong hygroscopic NH 4 NO 3 solid reduced the free water content in the slurry. In addition, the NH 4 NO 3 underwent crystalline transformation with the increase in the pH, and the specific surface area of the solid was increased. The coated CaHPO 4 particles were stripped from the ammonium salt and hydrated to form CaHPO 4 •2H 2 O. The slurry viscosity increased sharply with the increase in the solid content and the decrease in free water. The large amount of Ca 2+ in WPA-HNO 3 was the inducible factor for the formation of the high viscosity slurry. By adding 2.5% (wt) sodium hexametaphosphate as the Ca 2+ complexing agent in WPA-HNO 3 to avoid the formation of micron-sized CaHPO 4 , the maximum viscosity of the slurry decreased from 1361.00 ± 128.47 mPa• s to 351.24 ± 15.87 mPa•s.

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Waste Treatment and Resource Utilization: Removal and recovery of soluble impurities from nitric acid leaching residue of phosphate rock by electrokinetic

Chen

Jin

et al. 2023

Electrochimica Acta

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Separation of calcium chloride from waste acidic raffinate in HCl wet process for phosphoric acid manufacture: Simulated and experimental study

Cited by 7 publications

References 25 publications

Calcium Phosphate-Based Nanomaterials: Preparation, Multifunction, and Application for Bone Tissue Engineering

Calcium Phosphate-Based Nanomaterials: Preparation, Multifunction, and Application for Bone Tissue Engineering

Viscosity Formation Mechanism and Viscosity Reduction Strategy for Ammoniated Slurry of Nitrophosphate Fertilizer

Waste Treatment and Resource Utilization: Removal and recovery of soluble impurities from nitric acid leaching residue of phosphate rock by electrokinetic

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