Equilibrium thickness of foam films and adsorption of ions at surfaces: Water and aqueous solutions of sodium chloride, hydrochloric acid, and sodium hydroxide

The study of the spent acidic pickling solution (SAPS) processing is presented. The solution is formed in the process of etching titanium products with hydrochloric acid. The processing includes the stages of neutralizing the SAPS with alkali, filtration and drying of the titanium hydroxide precipitate, electrochemical processing of the filtrate containing sodium chloride in an electrolyzer with ion-exchange membranes. The electrolysis process produces sodium hydroxide and hydrochloric acid. The proposed scheme for processing the SAPS makes it possible to obtain titanium hydroxide, sodium hydroxide and hydrochloric acid. Titanium hydroxide can be used in various industries. Alkali can be used in the SAPS neutralization process. Hydrochloric acid after the adjustment is suitable for use in the etching of titanium products.

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THE INFLUENCE OF TEMPERATURE ON THE RATE OF NATURAL PENETRATION OF ELECTROLYTES INTO WOOD

Canadian Journal of Research ◽

10.1139/cjr34-015 ◽

1934 ◽

Vol 10 (2) ◽

pp. 180-189 ◽

Cited By ~ 2

Author(s):

O. Maass

Keyword(s):

Sodium Chloride ◽

Hydrochloric Acid ◽

Sodium Hydroxide ◽

Black Spruce ◽

Longitudinal Direction ◽

Lateral Direction ◽

Influence Of Temperature ◽

Influence Of Temperature On ◽

Different Shapes

The rates of diffusion of sodium hydroxide, sodium chloride and hydrochloric acid into chips of black spruce heartwood impregnated with water were measured for different shapes of chip at 20, 50, and 75 °C. In the longitudinal direction of the wood, hydrochloric acid diffuses the most rapidly and sodium hydroxide and sodium chloride at nearly the same rates. In the lateral direction sodium hydroxide diffuses the most rapidly, owing to its action on the wood. Concentration of electrolyte is practically without influence on the time to half-value for sodium hydroxide and hydrochloric acid. The density of the wood does not affect the rate of diffusion of sodium hydroxide.The rate of diffusion of water into air dry chips was measured at 20 and 50 °C.

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Activity coefficient of hydrochloric acid in aqueous solutions of sodium chloride

Journal of Solution Chemistry ◽

10.1007/bf00645511 ◽

1977 ◽

Vol 6 (6) ◽

pp. 385-392 ◽

Cited By ~ 16

Author(s):

J. B. Macaskill ◽

R. A. Robinson ◽

Roger G. Bates

Keyword(s):

Sodium Chloride ◽

Hydrochloric Acid ◽

Activity Coefficient ◽

Aqueous Solutions

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Electrostriction volumes of α-amino acids from density measurements in water and in aqueous HCl and NaOH solutions at 25 °C

Canadian Journal of Chemistry ◽

10.1139/v93-267 ◽

1993 ◽

Vol 71 (12) ◽

pp. 2150-2154 ◽

Cited By ~ 9

Author(s):

M. Abbate ◽

G. Castronuovo ◽

V. Elia ◽

S. Puzziello

Keyword(s):

Amino Acids ◽

Hydrochloric Acid ◽

Aqueous Solutions ◽

Sodium Hydroxide ◽

Volume Change ◽

Pure Water ◽

Partial Molar Volumes ◽

Molar Volumes ◽

Density Measurements ◽

Alkyl Chains

The values of the limiting partial molar volumes, [Formula: see text], for some α-amino acids bearing alkyl chains, in pure water and in aqueous solutions of hydrochloric acid and sodium hydroxide, have been obtained from density measurements. From these data it is possible to determine the volume change, ΔVZW, due to the formation of the amphionic molecule from the corresponding neutral molecule.

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Chemical Detoxification of AflatoxinB1 in Rice by Several Solutions through Fluorescence Spectral Experiment

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.364-366.1032 ◽

2007 ◽

Vol 364-366 ◽

pp. 1032-1036

Author(s):

Wen Li Chen ◽

Quan Zhou ◽

Da Xing

Keyword(s):

Sodium Chloride ◽

Hydrochloric Acid ◽

Emission Spectrum ◽

Sodium Hydroxide ◽

Aspergillus Flavus ◽

Sodium Hypochlorite ◽

Alkaline Solutions ◽

Excitation Wavelength ◽

Low Concentration ◽

Acid Addition

AflatoxinB1 was extracted from rice contaminated artificially with Aspergillus flavus by using methanol-water (50:50 v/v). As for experiment group, sodium chloride was added into the extracted solution of AfB1, the excitation wavelength of 365 nm under the fluorescence mode, and the emission spectrum peak at 440nm were observed. To study the detoxification of AflatoxinB1 in several alkaline solutions, the solution of alkaline with difference concentration was added into the solution of AfB1 respectively. The results showed that all of three alkaline solutions could decrease the 440nm emission spectrum peak of solution of AfB1 in varying degrees, the effect to decrease emission spectrum peak of AfB1 was very obvious in sodium hypochlorite (NaClO), and sodium hydroxide (NaOH) took second place, whereas in ammonia (NH3·H2O), the effect was the weakest among three alkaline solutions. Moreover, the effects were different in the same alkaline solutions with different concentration, as hydrochloric acid (HCl) in low concentration was added to this complex AfB1 alkaline solutions, detoxification efficacy of AfB1 were found to be obviously increased. It was concluded that the detoxification of AflatoxinB1 may be affected by alkaline solutions according to their concentration and be degraded greatly by acid addition.

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