Phase and extraction equilibria in the antipirin-pyrocatechol-water system

Денисова, С. А.; Kudryashova, O. S.; Леснов, А. Е.; Sazonova, E. A.

doi:10.1134/s1070363207110023

Russ J Gen Chem

2007

DOI: 10.1134/s1070363207110023

|View full text |Cite

Phase and extraction equilibria in the antipirin-pyrocatechol-water system

С. А. Денисова

O. S. Kudryashova

А. Е. Леснов

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2015

2021

Publication Types

Select...

Article3

Relationship

Self Cite1

Independent2

Authors

Journals

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analogous results were obtained with the use of the water-diantipyrylbutane (DAB)-NSA system [56]. As compared with the system containing DAM, the system based on DAB is more effective in the extrac tion of the acid complexes of metals.…”

mentioning

confidence: 62%

“…The maximum extraction of rare earth elements was shifted to the region of higher pH values. The complexes of Sc, Y, and rare earth elements are colorless [7]. For the stud ied rare earth elements (La, Sm, Tb, Dy, and Er), there is a correlation between рН 50 and ionic radius (r).…”

mentioning

confidence: 99%

“…The phase diagrams of the systems of antipyrine with pyrocatechol [7] at 50°С, trichloroacetic acid (TCA) at 30°С [8], NSA, monochloroacetic acid (MCA) [9], and monobromoacetic acid (MBA) [10] at 20°С are analogously shaped. The region of segre gation is closed, and it has two critical points and bor ders on the areas of unsaturated solutions.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Phase and extraction equilibriums in aqueous segregable systems with protolytic interaction

2015

Self Cite

View full text Add to dashboard Cite

The major advantage of aqueous segregable sys tems with protolytic interaction over traditional extraction systems is the absence of organic solvents. The low toxicity of pyrazolone derivatives and some organic acids reacting with them, for example, sul fosalicylic and naphthalene 2 sulfonic acids, is responsible for the safety of extraction processes and compliance with green chemistry requirements.Extraction systems without an organic solvent belong to multicomponent systems, in which separa tion into two liquid phases is observed at certain com ponent concentrations. The most complete picture of phase equilibriums in these systems, which is neces sary for the optimization of extraction processes, can be obtained using physicochemical analysis and the construction of corresponding solubility diagrams. These diagrams make it possible not only to determine the boundaries of a segregation region and a numerical ratio between phase volumes in the system but also to make conclusions on interactions between the com ponents.Systems with antipyrine. For the first time, the presence of an equilibrium region of two liquid phases in the water-antipyrine-organic acid ternary systems was established in the 1950s. Chloral hydrate [1], ben zoic acid [2], salycilic acid [3], phenol [4], and resor cinol [5] were used as acidic components. Many of the test systems were separated into two liquid phases only at elevated temperatures. The presence of the liquid two phase equilibrium region in the water-antipy rine-organic acid ternary systems makes them poten tially suitable for the extraction of metal ions. Extrac tion can occur due to the formation of both cationic complexes with antipyrine and the ion associates of metal acid complexes with the protonated form of the reagent. Studies on the extraction capabilities of these systems were initiated at the Department of Analytical Chemistry of the Perm University in the early 1980s [6].As an example, Fig. 1 shows a solubility diagram of the water-antipyrine-naphthalene 2 sulfonic acid (NSA) system. The liquid two phase equilibrium region (II) (16.7% of the total area of the diagram) is surrounded from all sides by the region of homoge neous solutions (I) (41.2%). We failed to examine in detail the bottom part of the concentration triangle with high concentrations of solid components because of a long equilibration time and difficulty in phase sep aration. The eutonic and peritonic compositions were not determined; therefore, the boundary lines of crys tallization fields were drawn tentatively.It is possible to assume the occurrence of the crys tallization fields of antipyrine (III) and NSA (IV); the crystal hydrates of antipyrine (VIII) and NSA (XI); the chemical compound antipyrine⋅NSA (VII); the three phase equilibrium of the crystals of antipyrine, the chemical compound antipyrine⋅NSA, and a solu tion of the composition E 1 (V); the crystals of NSA, the chemical compound, and a solution of the compo sition Е 2 (VI); the crystallization of antipyrine, its Abstract-Data on aqueous ...

show abstract

mentioning

confidence: 62%

mentioning

confidence: 99%

See 1 more Smart Citation

Phase and extraction equilibriums in aqueous segregable systems with protolytic interaction

2015

Self Cite

View full text Add to dashboard Cite

show abstract

Phase Equilibrium in Diantipyrylmethane–Organic Acid–Hydrogen Chloride–Water Systems

Kudryashova

Елохов

2021

Russ. J. Phys. Chem.

View full text Add to dashboard Cite

Extraction of scandium by diantipyrylalkanes from naphthalene-2-sulfonate solutions in the extraction systems of different types

2015

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Phase and extraction equilibria in the antipirin-pyrocatechol-water system

Cited by 3 publications

References 0 publications

Phase and extraction equilibriums in aqueous segregable systems with protolytic interaction

Phase and extraction equilibriums in aqueous segregable systems with protolytic interaction

Phase Equilibrium in Diantipyrylmethane–Organic Acid–Hydrogen Chloride–Water Systems

Extraction of scandium by diantipyrylalkanes from naphthalene-2-sulfonate solutions in the extraction systems of different types

Contact Info

Product

Resources

About