Ueber das Verhalten der fettsauren Alkalien und der Seifen in Gegenwart von Wasser. I

Krafft, F.; Stern, A.

doi:10.1002/cber.189402702116

Cited by 30 publications

(11 citation statements)

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“…(8) Mn02 is suspended stably by dilute solutions of silicate of soda and some other alkali salts and thus there is no difficulty in determining the detergent values of a soap just because it happens to have some such "filler" present. (9) When once the KMn04 solutions and the ferrous salt solution, as well as the soap solutions are prepared, one can make two or three score determinations without making any weighings except the one-gram portions of dirt (MnOo) started with.…”

Section: Table VImentioning

confidence: 99%

“…An explanation of this phenomenon has been offered. (9) The method of estimating the cleansing power of soaps by the use of sodium chloride, or a number of other salts, on suspensions of clay in soap solutions, was found not to be feasible. (10) A practical method has been developed for the direct and rapid determination of the amount of finely divided Mn02 which various detergent solutions are able to suspend for a definite period of time.…”

Section: Table IXmentioning

confidence: 99%

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Detergent Action of Soaps

Fall¹

1927

J. Phys. Chem.

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Section: Table VImentioning

confidence: 99%

Section: Table IXmentioning

confidence: 99%

Detergent Action of Soaps

Fall¹

1927

J. Phys. Chem.

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“…Many surfactant molecules are insolubilized and solidified with decreasing temperatures of the aqueous surfactant solutions. The insolubilization with the solidification of alkyl chains of the surfactant molecules inducing the formation of hydrated solids in water is termed the Krafft transition . Recently dynamical polymorphisms of surfactant-hydrated solid have been found in the transition from the metastable bilayer lamella to the stable interdigitated lamella during the Krafft transition of cetylpyridinium chloride (CPC) in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

“…The insolubilization with the solidification of alkyl chains of the surfactant molecules inducing the formation of hydrated solids in water is termed the Krafft transition. 1 Recently dynamical polymorphisms of surfactant-hydrated solid have been found in the transition from the metastable bilayer lamella to the stable interdigitated lamella during the Krafft transition of cetylpyridinium chloride (CPC) 2 in aqueous solution. The dynamical polymorphism of hydrated solid has been also found in the changing periodic length of undulated lamella solid of octadecyltrimethylammonium chloride (OTAC) 3 in the aqueous solid suspension.…”

Section: Introductionmentioning

confidence: 99%

Transformation Relationships among Monomers, Micelles, Metastable Solid, and Stable Solid in Aqueous Cetylpyridinium Chloride Solution

Sasaki

2010

J. Phys. Chem. B

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Kinetic studies on metamorphoses among monomer, micelle, metastable solid, and stable solid during the Krafft transition of cetylpyridinium chloride (CPC) in the aqueous solution were carried out. The Krafft transition accompanied a decrease of the electric conductance with a large increment of the dielectric permittivity Delta epsilon, which vanished after finishing the transition. The observing duration of large Delta epsilon in transforming to the metastable solid was much shorter than the duration in transforming to the stable solid. From the observing duration of Delta epsilon, a formation boundary between the metastable and the stable solids was determined as a function of the temperature and the CPC concentration. It was found from the boundary that the metastable solid forms in the micelle solution. A change in the electric conductivity kappa of metastable solid suspensions during metastable-stable transformation suggests the solid dissolution-limited metamorphosis of metastable solid into the stable solid in the solution. Arrhenius plots of the metastable-stable transformation durations obtained from the time courses of kappa changes gave the high activation energy of 290 kJ/mol for the metastable solid dissolution-limited metastable-stable transition.

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“…The hydrolysis of water-soluble soaps in dilute aqueous solution has been extensively studied (8,(10)(11)(12)(13)(14)(15)(16)19). When a hydrocarbon dispersion of an oil-soluble soap such as sodium phenyl stearate is equilibrated with an aqueous phase, the hydrolysis of the soap would be expected to be more extensive than that occurring in strictly aqueous systems, because the two primary products of hydrolysis, sodium hydroxide and phenyl stearic acid, are exclusively soluble in the water and hydrocarbon, respectively, so that the reverse reaction can occur only at the oilwater interface.…”

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confidence: 99%