Formation of Monofluorophosphate from Fluoride in Phosphoric Acid—Water and Phosphoric Acid—Sulfuric Acid—Water Mixtures.

ChemInform ◽  
2007 ◽  
Vol 38 (41) ◽  
Author(s):  
Kenneth E. Newman ◽  
Raymond E. Ortlieb ◽  
Nicole Pawlik ◽  
Jason Reedyk
Keyword(s):  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Acid Water

Formation of monofluorophosphate from fluoride in phosphoric acid – water and phosphoric acid – sulfuric acid – water mixtures

2007 ◽  
Vol 85 (5) ◽  
pp. 346-351 ◽  
Author(s):  
Kenneth E Newman ◽  
Raymond E Ortlieb ◽  
Nicole Pawlik ◽  
Jason Reedyk
Keyword(s):  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Reaction Kinetics ◽  
Water Activity ◽  
Activity Coefficients ◽  
Sodium Fluoride ◽  
Rate Constants ◽  
Strong Acid ◽  
Ternary Mixtures ◽  
Acid Water

When dissolved in concentrated phosphoric acid, sodium fluoride reacts rapidly to form monofluorophosphate. In less concentrated acid, the reaction does not proceed to completion, and the reaction kinetics become very much slower. The equilibrium and rate constants for the reaction have been determined. In ternary mixtures of phosphoric acid, sulfuric acid, and water, the formation of monofluorophosphate is considerably enhanced, and the kinetics are rapid. The results are interpreted in terms of the very low water activity coefficients in strong-acid solutions.Key words: monofluorophosphate, monofluorophosphoric acid, 19F NMR, 31P NMR, phosphoric acid, sulufric acid, equilibria, kinetics.

Study of Vibrational Spectra of Polyaniline Doped with Sulfuric Acid and Phosphoric Acid

2001 ◽  
Vol 96 (1-3) ◽  
pp. 173-182 ◽  
Author(s):  
Manju Arora ◽  
Vandna Luthra ◽  
Ramadhar Singh ◽  
S K Gupta
Keyword(s):  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Vibrational Spectra

scholarly journals Effect of ions on sulfuric acid-water binary particle formation: 1. Theory for kinetic- and nucleation-type particle formation and atmospheric implications

2016 ◽  
Vol 121 (4) ◽  
pp. 1736-1751 ◽  
Author(s):  
Joonas Merikanto ◽  
Jonathan Duplissy ◽  
Anni Määttänen ◽  
Henning Henschel ◽  
Neil M. Donahue ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Particle Formation ◽  
Acid Water ◽  
Type Particle

Crystal solvates in the poly[p-phenylene(benzo[1,2-d:4,5-d']bisthiazole-2,6-diyl)]/poly(phosphoric acid)/water system

1991 ◽  
Vol 24 (5) ◽  
pp. 1161-1167 ◽  
Author(s):  
Yachin Cohen ◽  
Yasuo Saruyama ◽  
Edwin L. Thomas
Keyword(s):  
Phosphoric Acid ◽  
Water System ◽  
Acid Water ◽  
Crystal Solvates

scholarly journals Binary nucleation of sulfuric acid-water: Monte Carlo simulation

1998 ◽  
Vol 108 (16) ◽  
pp. 6829-6848 ◽  
Author(s):  
I. Kusaka ◽  
Z.-G. Wang ◽  
J. H. Seinfeld
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Sulfuric Acid ◽  
Acid Water ◽  
Binary Nucleation

scholarly journals Study of the regularity of the process of decomposition of apatite with sulfuricacid at the boilingpoint of the solution

2019 ◽  
Vol 58 (4) ◽  
pp. 119-122
Author(s):  
Rauf F. Sabirov ◽  
◽  
Alexey F. Makhotkin ◽  
Yury N. Sakharov ◽  
Igor A. Makhotkin ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Boiling Point ◽  
Batch Reactor ◽  
Material Balance ◽  
Mercury Thermometer ◽  
Experimental Values ◽  
Kinetics Of ◽  
Liquid And Solid Phases ◽  
Phosphoric Acids

Experimental research of the kinetics of the decomposition process of Kovdorsky apatite with a size = 0.16 mm with sulfuric acid in a 1 dm3 batch reactor. Phosphoric acid with the concentration of 68.6 % wt and the sulfuric acid with the concentration of 12.3% wt in stoichiometric amount was introduces at the beginning of the process. The process was carried out at a ratio of liquid and solid phases 2.5:1 respectively at the boiling point of the mixture equal to 136 °C. The observing the progress was carried out according to the method of joint designation of sulfuric and phosphoric acids by titrimetric analysis. With methyl orange and then phenolphthalein 2 titration jumps were recorded, the first of which corresponded to the neutralization of sulfuric acid to Na2SO4 and phosphoric acid to NaH2PO4, the second to the neutralization of NaH2PO4 to Na2HPO4. The change in temperature of the reaction mixture was fixed during the process using a mercury thermometer. In the analysis of the derived experimental values of specified parameters that the boiling point decreases from 136 to 133.1 оС within 50 minutes during the process. A comparison of the reported values with the concentration values of sulfuric and phosphoric acids measured during the process shows that the change in boiling point of the reaction mixture is proportional to the change in the concentrations of sulfuric and phosphoric acids. This model is a closed system that provides thermal insulation and no loss of material balance. Thus, the kinetics of the decomposition of apatite with sulfuric acid at the boiling point can be monitored by the temperature change under specified conditions.

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