Use of potassium ferrocyanide as habit modifier in the size reduction and phase modification of ammonium nitrate crystals in slurries

Vargeese, Anuj A.; Joshi, Suresh G.; Krishnamurthy, V.

doi:10.1016/j.jhazmat.2010.04.073

Cited by 19 publications

(8 citation statements)

References 27 publications

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“…These results also were satisfactory in that inorganic potassium salts are very effective on the AN phase transition in the temperature range 30-100 °C. However, Vargeese et al [18] found that potassium ferrocyanide modifies the crystallization of AN but does not affect AN phase transitions. A possible reason for the difference between their results and ours is the amount of additive used.…”

Section: Dsc Analysismentioning

confidence: 99%

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Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Wang

2016

Cent. Eur. J. Energ. Mater.

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Abstract:A study has been undertaken on the effect of additives on the phase transition of ammonium nitrate(V) (AN). Results obtained using Differential Scanning Calorimetry (DSC) showed that organic compounds and potassium salts of organic compounds have an effect on the phase transition behavior of AN. The samples were further analyzed using infrared (IR) and powder X-ray diffraction (XRD). The mechanism of phase stabilization of AN by compounds of this kind was examined. The present study showed that the influence of additives on the phase transition of AN occurs through the polar groups that are involved in intermolecular interactions of orbital and electrostatic types that form new hydrogen bonds. AN exists in only one phase in the temperature range from 30 °C to +100 °C, when a potassium salt of organic compounds was added. However, with organic compounds, the III→II phase transition was changed. IR and XRD of composites are characterized by new intermolecular interactions. Compacted samples of AN containing potassium salts of organic compounds exhibited better stability than AN containing organic compounds to multiple cyclic changes within a temperature range. This we named 'freezing and thawing analysis'. Additives have two functions on the AN phase transition. First, solid solutions of AN mixture were formed for K + replacement of NH4 + . Second, hydrogen bonds formed, which caused AN and salts of organic compounds to interact intimately

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Section: Dsc Analysismentioning

confidence: 99%

“…A possible reason for the difference between their results and ours is the amount of additive used. Vargeese et al [18] added only 0.1-1% of additive. Therefore, we can further conclude that organic potassium salts, which contain polar groups, are very effective on the AN phase transition in the temperature range 30-100 °C.…”

Section: Dsc Analysismentioning

confidence: 99%

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Wang

2016

Cent. Eur. J. Energ. Mater.

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“…Crystal modifiers are mainly divided into ionic, molecular, and surfactants. [23][24][25][26] Generally speaking, the mechanism of action of crystal modifiers similar in size to the main system can be divided into two types. The first is retardation.…”

Section: The Effects Of Tween-80 On Particle Sizementioning

confidence: 99%

Optimization of the Crystallization Process of Bis(2‐hydroxyethyl) Terephthalate

Yuan

Liu

Sun

2021

Crystal Research and Technology

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The crystallization process of bis(2‐hydroxyethyl) terephthalate is experimentally investigated. The optimized crystals of bis(2‐hydroxyethyl) terephthalate have the median particle size (D50) of 1300 µm and a perfect crystal habit, and their diameter span reduces from 11.48 (before optimization) to 1.72 (after optimization). The results show that more oxygen atoms at both ends of the crystal are exposed to the crystal surfaces, which make it easy to form hydrogen bonds with free bis(2‐hydroxyethyl) terephthalate. Therefore, the crystal surfaces at both ends grow fastest and tend to disappear eventually.

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“…Phoenix made a research about the effect of various additives on the caking of NaCl and KCl, and presented many effective agents such as sodium or potassium ferrocyanide, ferricyanide, and so on. Potassium ferricyanide and such materials have been frequently used until now because of their properties of modification and anticaking effect on different inorganic crystals. − However, it is worth noting that with the increasing of food safety standards, potassium ferrocyanide and such materials, which are harmful to humans, are gradually being prohibited from use. Therefore, the key point is to select appropriate substitutes.…”

Section: Introductionmentioning

confidence: 99%

Determination and Chemical Modeling of Phase Equilibria for the Glycine–KCl–NaCl–H₂O System and Its Application To Produce Crystals with Anticaking Characteristics

Gao

2012

Ind. Eng. Chem. Res.

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The phase equilibria of the glycine−KCl−NaCl−H 2 O system were determined in the concentrations up to 3.33 mol•kg −1 over the temperature range from 283.2 to 363.2 K using a dynamic method. A rigorous chemical model for the glycine−KCl−NaCl−H 2 O system was established by the Pitzer model with the help of an OLI platform. With the equilibrium constants of dissociation reactions obtained by standard-state thermodynamic data, the new Pitzer model parameters were harvested by regressing solubility of the system. These newly obtained parameters were used to accurately predict the multiple saturated points at the temperature range from 283.2 to 363.2 K. The phase behavior of the ternary glycine−KCl−H 2 O and glycine−NaCl−H 2 O system at 298.2 and 343.2 K were successfully visualized with lucidity on an equilateral triangle. To investigate the effect of glycine on the morphology of KCl, the KCl crystals were produced from glycine solution with different concentration (17−25% w/v) by evaporation at ambient temperature. The glycine (25% w/v)-modified KCl crystal changed its morphology from native cubic to hexagonal prism form with the angle of repose from 32°to 23.8−25.8°, indicating a good flowability and anticaking characteristics. Finally, KCl supersaturation variation with evaporation time was simulated with aid of the chemical model established in present study to elucidate the influence of glycine concentration on the anticaking characteristics of KCl crystal. All the results generated from this study will provide the fundamentals for industrial application to produce crystals with anticaking characteristics.

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Use of potassium ferrocyanide as habit modifier in the size reduction and phase modification of ammonium nitrate crystals in slurries

Cited by 19 publications

References 27 publications

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Optimization of the Crystallization Process of Bis(2‐hydroxyethyl) Terephthalate

Determination and Chemical Modeling of Phase Equilibria for the Glycine–KCl–NaCl–H₂O System and Its Application To Produce Crystals with Anticaking Characteristics

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Use of potassium ferrocyanide as habit modifier in the size reduction and phase modification of ammonium nitrate crystals in slurries

Cited by 19 publications

References 27 publications

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Phase Stability of Ammonium Nitrate with Organic Potassium Salts

Optimization of the Crystallization Process of Bis(2‐hydroxyethyl) Terephthalate

Determination and Chemical Modeling of Phase Equilibria for the Glycine–KCl–NaCl–H2O System and Its Application To Produce Crystals with Anticaking Characteristics

Contact Info

Product

Resources

About

Determination and Chemical Modeling of Phase Equilibria for the Glycine–KCl–NaCl–H₂O System and Its Application To Produce Crystals with Anticaking Characteristics