Extraction Kinetics of Nitric Acid from the Nitric Acid-Hydrochloric Acid-Potassium Chloride Solution by Tributyl Phosphate

2021 ◽  
pp. 118984
Author(s):  
Lei Su ◽  
Baicheng Pan ◽  
Ze Sun ◽  
Ping Song ◽  
Xingfu Song
Keyword(s):  
Nitric Acid ◽  
Hydrochloric Acid ◽  
Potassium Chloride ◽  
Tributyl Phosphate ◽  
Chloride Solution ◽  
Potassium Chloride Solution ◽  
Extraction Kinetics ◽  
Kinetics Of

Polarographic Determination of Niacinamide in Multivitamin Preparations

1974 ◽  
Vol 57 (4) ◽  
pp. 910-913
Author(s):  
Albert Y Taira
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Bicarbonate ◽  
Potassium Chloride ◽  
Chloride Solution ◽  
Mercury Electrode ◽  
Sodium Bicarbonate Solution ◽  
Potassium Chloride Solution ◽  
Microbiological Methods ◽  
Dropping Mercury Electrode

Abstract Niacinamide is extracted from multivitamin preparations with sodium bicarbonate solution. The extract is mixed with Celite and packed into a chromatographic column. The vitamin is eluted with 10% re-propanol in ether and the eluate is evaporated to dryness in the presence of hydrochloric acid. The residue is dissolved in potassium chloride solution and diluted to volume. The polarogram, from –1.40 to –1.90 v, is recorded on a polarograph equipped with a dropping mercury electrode and an H-cell with a saturated calomel reference cell. Additional assays with chemical and microbiological methods showed comparable results. The method is sensitive to 2 mg niacinamide.

Concentration of Impurities during Melting of Snow Made from Secondary Sewage Effluent

1986 ◽  
Vol 18 (2) ◽  
pp. 151-156 ◽  
Author(s):  
R. Zapf-Gilje ◽  
S. O. Russell ◽  
D. S. Mavinic
Keyword(s):  
Potassium Chloride ◽  
Chloride Solution ◽  
Laboratory Experiments ◽  
Field Experiments ◽  
Low Cost ◽  
Sewage Effluent ◽  
Potassium Chloride Solution ◽  
Laboratory Results ◽  
Solution Field ◽  
Concentration Of Impurities

When snow is made from sewage effluent, the impurities become concentrated in the early melt leaving the later runoff relatively pure. This could provide a low cost method of separating nutrients from secondary sewage effluent. Laboratory experiments showed that the degree of concentration was largely independent of the number of melt freeze cycles or initial concentration of impurity in the snow. The first 20% of melt removed with it 65% of the phosphorus and 90% of the nitrogen from snow made from sewage effluent; and over 90% of potassium chloride from snow made from potassium chloride solution. Field experiments with a salt solution confirmed the laboratory results.

DETERMINATION OF TRACE AMOUNTS OF SILVER IN GALENA ORES

1960 ◽  
Vol 38 (9) ◽  
pp. 1488-1494 ◽  
Author(s):  
E. J. Bounsall ◽  
W. A. E. McBryde
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Silver Content ◽  
Aqueous Sodium Chloride Solution ◽  
Aqueous Sodium

An analytical method is described for the determination of microgram amounts of silver in galena ores, based on the "reversion" of silver dithizonate. Silver is separated from relatively large amounts of lead by extraction as dithizonate into chloroform from an aqueous 1:99 nitric acid solution. Separation from mercury, which is also extracted under these conditions and would, if present, interfere in the analysis, is achieved by reverting the dithizonate solution with a 5% aqueous sodium chloride solution which is also 0.015 molar in hydrochloric acid. Following dilution of this aqueous solution and adjustment of pH, silver is again extracted into chloroform as the dithizonate, and determined absorptiometrically. Analyses of a number of galena ore samples showed a precision of within 3% for a silver content ranging from 0.03 to 0.4%.Some other methods for isolating silver from these samples, which were tried but found unsatisfactory, are discussed.

The creeping-film phenomenon of potassium chloride solution

Nature ◽  
1976 ◽  
Vol 264 (5584) ◽  
pp. 383-384
Author(s):  
ALEXANDER M. YACYNYCH ◽  
WILLIAM R. HEINEMAN
Keyword(s):  
Potassium Chloride ◽  
Chloride Solution ◽  
Potassium Chloride Solution

scholarly journals The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Nukleonika ◽  
2015 ◽  
Vol 60 (4) ◽  
pp. 865-869
Author(s):  
Richard J. Wilbraham ◽  
Colin Boxall
Keyword(s):  
Stainless Steel ◽  
Nitric Acid ◽  
Stainless Steels ◽  
Steel Corrosion ◽  
Reductive Dissolution ◽  
Extraction Kinetics ◽  
Weak Absorption ◽  
Solution Interface ◽  
Nuclear Reprocessing ◽  
Kinetics Of

Abstract SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.

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