Solubilities of ammonium and potassium alums in water - Densities of the Saturated Solutions

Schlain, David; Prater, John D.; Ravitz, S. Frederick

doi:10.1021/ie50445a026

Cited by 12 publications

(8 citation statements)

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“…For the purpose of comparison, both the solubility and density data of potash alum in pure aqueous solutions obtained in this work are presented in Table IV together with those data available in literature (/1, 12, 14-18). The solubility data of potash alum in pure aqueous solutions obtained in the present study are intermediate between those of Mullin and Sipek (12) and of Garside (11), with higher values than those reported by Broul et al (14), Schlein et al (15), Berkeley (16), International Critical Tables (17), and Solubility of Inorganic and Organic Compounds (18). A more significant difference is observed in the case of density.…”

Section: Methodscontrasting

confidence: 83%

Solubility and density isotherms for potash alum-water-acetone

Mydlarz¹,

Jones²

1989

J. Chem. Eng. Data

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Section: Methodscontrasting

confidence: 83%

Solubility and density isotherms for potash alum-water-acetone

Mydlarz¹,

Jones²

1989

J. Chem. Eng. Data

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“…Moreover, the slightly supersaturated Al(OH) 3 solutions may stay in a metastable state and spontaneous precipitation need not occur. Schlain et al explicitly neglected the effect of hydrolysis upon the solubility of ammonium alum in pure water since they experimentally determined that in the temperature range from (25 to 80) °C, only 0.01 % to 0.1 % of the alum in some saturated solutions had hydrolyzed. In the other earlier studies on the solubilities in the (NH 4 ) 2 SO 4 + Al 2 (SO 4 ) 3 + H 2 O system, − the occurrence of aluminum hydrolysis was not reported.…”

Section: Methodsmentioning

confidence: 99%

Solubility of Ammonium Aluminum Sulfate Dodecahydrate in the Aluminum Sulfate + Ammonium Sulfate + Sulfuric Acid + Water System at (25, 30, 40, and 50) °C

Hostomská

Hostomský

2005

J. Chem. Eng. Data

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Solubilities of NH 4 Al(SO 4 ) 2 ‚12H 2 O in mixed aqueous solutions of Al 2 (SO 4 ) 3 and (NH 4 ) 2 SO 4 were determined at (25, 30, 40, and 50) °C. At the same temperatures, solubilities of NH 4 Al(SO 4 ) 2 ‚12H 2 O in the (NH 4 ) 2 SO 4 + Al 2 (SO 4 ) 3 + H 2 SO 4 + H 2 O system and densities of the equilibrium solutions were measured for sulfuric acid mass fraction on the salt-free basis, w′, equal to 0.1. The measured solubilities were compared with available literature data. Ammonium alum solubilities are only moderately influenced by the sulfuric acid addition up to w′(H 2 SO 4 ) ) 0.1. The addition of sulfuric acid to the ternary (NH 4 ) 2 SO 4 + Al 2 (SO 4 ) 3 + H 2 O solution increases the ammonium alum solubility in solutions with a NH 4 /Al molar ratio close to 1. In contrast, at either low or high NH 4 /Al molar ratios, the ammonium alum solubility is suppressed by the sulfuric acid addition.

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“…Ammonium alum is produced by the recovering the alumina from clay, whilst potassium alum is produced via the recovery of alumina from alunite [8]. Ammonium alum [NH 4 Al(SO 4 ) 2 .12H 2 O], a white crystalline double sulfate of aluminum, is used in fireproofing textiles, porcelain cement, water purification, and natural deodorant [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nano-alumina powder via recrystallization of ammonium alum

Saud¹,

Majdi²,

Saud

2019

Cerâmica

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In the present study, a recrystallization method was implemented to recover alumina powder from ammonium alum crystal. The ammonium alum was completely dissolved in water and treated by ultra-sonication to prevent the agglomeration of the alum crystal. The white precipitate was dried at 150 °C for 6 h, and calcinations at different temperatures were performed for 2 h. The XRD results indicated the crystalline structure of alumina with two main phases: γ-Al2O3 and α-Al2O3 at 800 and 1200 °C, respectively. The N2 adsorption/desorption isotherm results indicated that the surface area for the powder in the γ phase, which can be applied in catalysts, was 142.5 m2/g, while, in the α-phase, it was 15.3 m2/g. The morphologies elucidated that the powder particles were widely distributed in the range of ≤160 nm at different calcination temperatures and this may be attributed to increments in the particle agglomeration as the calcination temperature increased.

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Solubilities of ammonium and potassium alums in water - Densities of the Saturated Solutions

Abstract: of that company entered into many constructive discussions and supplied the production data. E. F. Schweitzer made some of the measurements and calculations. The authors are greatly indebted' to E. J. Serfass for carrying out the gas microanalysis.

Cited by 12 publications

References 0 publications

Solubility and density isotherms for potash alum-water-acetone

Solubility and density isotherms for potash alum-water-acetone

Solubility of Ammonium Aluminum Sulfate Dodecahydrate in the Aluminum Sulfate + Ammonium Sulfate + Sulfuric Acid + Water System at (25, 30, 40, and 50) °C

Synthesis of nano-alumina powder via recrystallization of ammonium alum

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