Potassium oleate

Surfactants. These enhance the colloid stability against mechanical and chemical stresses, help to disperse fillers, aid in wetting and enhance foaming. The most common surfactants are dodecylbenzene sulphonates and potassium oleate. 

Chemical Designations - Synonyms Potassium oleate Chemical Formula C,7H33COOK. Ohservahle Characteristics - Physical State (as shipped) Solid or liquid Color Brown Odor. Faint soapy. 

The influence of cosurfactant structure is best illustrated by using various isomeric alcohols with the same chain length. This is shown in Figure 4 for the system water, benzene, potassium oleate and amylic alcohols (25). The mass ratio of potassion oleate to COH is 3 5 and the temperature was 22°C. 

Figure 4. Phase diagrams of the system water benzene potassium oleate/an lic alcohols (a)...

Variation of k with for the system water/hexadecane/potassium oleate/hexanol. 

The PLIMSTEX curve for 0.3 pM WT-IFABP titrated with potassium oleate fits well with a 1 1 binding model [22, 24], The K and ADi (difference between the average deuterium level of one-ligand-bound protein and that of apo protein) for WT-IFABP are (2.6 + 0.6) x lO and 13.8 + 0.7 (Table 11.1), respectively, indicating that a strong interaction between oleate and WT-IFABP occurs with protection of 14 backbone amide hydrogens. 

The value of h the number of palmitate ions in the micelle is at least ten. The examination of a solution of potassium oleate at a temperature of 0T8°C. by these methods has resulted in the following values for the concentrations of the various substances present. 

Figure 8.13b shows the same data as Figure 8.13a, replotted with the variables interchanged. Note how the homogeneous area expands in size with increasing potassium oleate concentration up to 0.44 mole kg. At still higher concentrations of potassium oleate the homogeneous area shrinks as other surfactant phases compete for the components. 

FIG. 8.13 Two representations of a portion of the phase diagram for the water-benzene-potassium oleate-pentanol system. The unshaded regions represent homogenous solutions, (a) Redrawn, with permission, from S. Friberg and I. Burasczeska, Prog. Colloid Polym. Sci., 63, 1 (1978). (b) Redrawn, with permission, from C. U. Herrmann, U. Wurz, and M. Kahlweit, In Solution Chemistry of Surfactants, Vols. 1 and 2 (K. L. Mittal, Ed.), Plenum, New York, 1979. 

If a soap is added to a lead hydrogen arsenate-hydrated ferric oxide mixture considerable damage and leaf drop is caused, especially if the soap contains a strong base, as in the case of commercial potash fish-oil soap or potassium oleate. Laboratory tests show that more soluble arsenic is formed than with a soap of a weak base such as triethanolamine oleate.7 The addition of cryolite to an arsenate inhibits the formation of soluble arsenic 8 fluosilicates cause decomposition. These fluorine... 

A nonpolar solubilizate such as hexane penetrates deeply into such a micelle, and is held in the nonpolar interior hydrocarbon environment, while a solubilizate such as an alcohol, which has both polar and nonpolar ends, usually penetrates less, with its polar end at or near the polar surface of the micelle. The vapor pressure of hexane in aqueous solution is diminished by the presence of sodium oleate m a manner analogous to that cited above for systems in nonpolar solvents. A 5% aqueous solution of potassium oleate dissolves more than twice the volume of propylene at a given pressure than does pure water. Dnnethylaminoazobenzene, a water-insoluble dye, is solubilized to the extent of 125 mg per liter by a 0.05 M aqueous solution of potassium myristate. Bile salts solubilize fatty acids, and this fact is considered important physiologically. Cetyl pyridinium chloride, a cationic salt, is also a solubilizing agent, and 100 ml of its A/10 solution solubilizes about 1 g of methyl ethyl-butyl either m aqueous solution. 

Figure 3. Effect of various straight-chain potassium C18 carboxylate soaps upon mechanical stability of natural rubber latex (2) (KCt8) potassium stearate (KC18) potassium oleate (KC18") potassium elaidate (KC18Z) potassium linoleate (KC=ZZ) potassium linolenate (KC1H12(oli)) potassium 12-hydroxy stearate ...

How can one convert the potassium salt of a fatty acid (i.e., potassium oleate) into a fatty acid (oleic acid) ... 

The standard solution of soap can also conveniently be prepared by neutralising an alcohol solution of oleic acid with a solution of potassium hydroxide in the same solvent the neutral solution of potassium oleate... 

Again in the lubrication of moving metal parts oriented layers are produced, solidly anchored to the metal by carboxyl groups etc. Only the London interaction between the hydrocarbon tails then still acts between the two metal parts each with their layer of lubricating oil. A pure hydrocarbon (kerosene or paraffin oil) lubricates badly since this is forced away through inadequate adhesion to the metal. This is not only a consequence of too small a viscosity since a soap solution (potassium oleate etc.) is serviceable (drilling oil). 

Figure 7. At low water content (< 35% by weight) the water is not involved in colloidal association structures in a pentanol/potassium oleate (weight ratio 3.0)...

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