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Sodium oleate

The following values for the surface tension of a 10 Af solution of sodium oleate at 25°C are reported by various authors (a) by the capillary rise method, y - 43 mN/m (b) by the drop weight method, 7 = 50 mN/m and (c) by the sessile drop method, 7 = 40 mN/m. Explain how these discrepancies might arise. Which value should be the most reliable and why ... [Pg.41]

If the third substance dissolves in both liquids (and the solubility in each of the liquids is of the same order), the mutual solubility of the liquids will be increased and an upper C.S.T. will be lowered, as is the case when succinic acid or sodium oleate is added to the phenol - water system. A 0 083 molar solution of sodium oleate lowers the C.S.T. by 56 -7° this large effect has been applied industrially in the preparation of the disinfectant sold under the name of Lysol. Mixtures of tar acids (phenol cresols) do not mix completely with water at the ordinary temperature, but the addition of a small amount of soap ( = sodium oleate) lowers the miscibility temperature so that Lysol exists as a clear liquid at the ordinary temperature. [Pg.20]

X 10 M sodium oleate 1.5 X 10 M sodium oleate 10 M sodium oleate, pH = 8.1 10 Af potassium ethyl xanthate water... [Pg.43]

Fig. 16. Two-hquid flotation flow sheet (39). The original ROM is kaolin (white clay) that contains 11% impurity in the form of mica, anatase, and siUca. Treatment produces high purity kaolin and a Ti02-rich fraction. A, Kaolin stockpile D, dispersant (sodium siUcate plus alkah) W, water K, kerosene C, collector (sodium oleate) RK, recycled kerosene S, screen M, inline mixer SPR, separator CFG, centrifuge P, product and T, to waste. Fig. 16. Two-hquid flotation flow sheet (39). The original ROM is kaolin (white clay) that contains 11% impurity in the form of mica, anatase, and siUca. Treatment produces high purity kaolin and a Ti02-rich fraction. A, Kaolin stockpile D, dispersant (sodium siUcate plus alkah) W, water K, kerosene C, collector (sodium oleate) RK, recycled kerosene S, screen M, inline mixer SPR, separator CFG, centrifuge P, product and T, to waste.
Formulated metal poHshes consist of fine abrasives similar to those involved in industrial buffing operations, ie, pumice, tripoH, kaolin, rouge and crocus iron oxides, and lime. Other ingredients include surfactants (qv), eg, sodium oleate [143-19-1] or sodium dodecylben2enesulfonate [25155-30-0], chelating agents (qv), eg, citric acid [77-92-9], and solvents, eg, alcohols or aUphatic hydrocarbons. [Pg.211]

In a study of the adsorption of soap and several synthetic surfactants on a variety of textile fibers, it was found that cotton and nylon adsorbed less surfactant than wool under comparable conditions (59). Among the various surfactants, the cationic types were adsorbed to the greatest extent, whereas nonionic types were adsorbed least. The adsorption of nonionic surfactants decreased with increasing length of the polyoxyethylene chain. When soaps were adsorbed, the fatty acid and the aLkaU behaved more or less independently just as they did when adsorbed on carbon. The adsorption of sodium oleate by cotton has been shown independently to result in the deposition of acid soap (a composition intermediate between the free fatty acid and the sodium salt), if no heavy-metal ions are present in the system (60). In hard water, the adsorbate has large proportions of lime soap. [Pg.532]

Chemical Designations - Synonyms Eunatrol Sodium oleate Chemical Formula Ci7H33COONa. Ohservahle Characteristics - Physical State (as shipped) Solid Color Light tan Odor Slight tallowlike. [Pg.302]

Glyceryl dioleate monopalmitate — > glycerol + 2 sodium oleate -r sodium pal mi tale... [Pg.1277]

The ability to disperse the calcium soap formed from a given amount of sodium oleate has been studied for a number of a-sulfo fatty acid esters with 14-22 carbon atoms [28,30]. In principle, the lime soap dispersion property increases with the number of C atoms and the dissymmetry of the molecule. Esters with 14 C atoms have no dispersion power and in the case of esters with 15-17 carbon atoms the least symmetrical are the better lime soap-dispersing agents. However this property does not only depend on the symmetry but on the chain length of the fatty acid group. For example, methyl and ethyl a-sulfomyristate have better dispersing power than dodecyl propionate and butyrate. The esters with 18 and more carbon atoms are about equal in lime soap dispersion power. Isobutyl a-sulfopalmitate is the most effective agent under the test conditions. [Pg.482]

This test measures the minimum lime soap dispersant requirement (LSDR) (in g) which keeps 100 g of sodium oleate from precipitating in hard water (333 ppm CaC03). Although this is a convenient laboratory test, it bears little relation to an real in-use situation. [Pg.636]

Carboxylates (9.4, where R is the long-chain hydrophobe and X the cation) represent the oldest type of surfactants, since they could be obtained from naturally occurring fats and oils long before the advent of the petrochemical industry sodium heptadecanoate (9.5), for example, incorporates the cetyl group as hydrophobe. Sodium stearate, sodium palmitate and sodium oleate are the simplest carboxylates generally used as surfactants. Alkylaryl compounds (9.6) are also known. [Pg.17]

Hiraide et al. [737] developed a multielement preconcentration technique for chromium (III), manganese (II), cobalt, nickel, copper (II), cadmium, and lead in artificial seawater using coprecipitation and flotation with indium hydroxide followed by ICP-AES. The metals are simultaneously coprecipitated with indium hydroxide adjusted to pH 9.5, with sodium hydroxide, ethano-lic solutions of sodium oleate and dodecyl sulfate added, and then floated to... [Pg.259]

Those of complex constitution and high molecular weight, e.g., sodium glycocholate, Congo red, methyl orange, sodium oleate, which show adsorption 20—100 times larger than that calculated from the formula. [Pg.46]

Oscillatory pattern in liquid membrane with sodium oleate and DPPE... [Pg.248]

As the interfacial tension is directly related to the concentration of surfactant molecules at the interface [46], the rhythmic changes in the interfacial tension suggest that the concentration of surfactant, sodium oleate in Figure 22A and DPPE in Figure 22B, at the oil/water interface changes repeatedly between high and low values. [Pg.250]

There are only a few collectors suitable for tin flotation that have been introduced into operating plants in the 1970s, but today they have been replaced (i.e. arsonic acid, phospho-nic acid) due to toxicity and high prices. Other collectors that have been extensively studied include oleic acid, sodium oleate, alkyl phosphoric acid and hydroxamates [2—4],... [Pg.93]

Research work carried out at the Mechanobre Institute in Russia involved the evaluation of cationic and anionic collectors [8], The anionic collectors examined included sodium oleate and sodium alkyl sulphate. The results obtained indicated that with the use of sodium oleate, both zircon and pyrochlore can be floated with good recoveries (Figure 22.3). [Pg.117]

Figure 22.3 Effect of sodium oleate on flotation of niobium from pegmatite ores. Figure 22.3 Effect of sodium oleate on flotation of niobium from pegmatite ores.
Studies conducted by Mechanabve Institute [1,2] indicate that tantalite and columbite can be floated using sodium oleate. Figure 23.1 shows the effect of level of sodium oleate... [Pg.129]

Figure 23.1 Effect of level of sodium oleate on recovery of tantalite, columbite and associated gangue minerals. Figure 23.1 Effect of level of sodium oleate on recovery of tantalite, columbite and associated gangue minerals.
Monazite is readily floatable using cationic collectors such as oleic acid and sodium oleate in the pH region of 7-11. Monazite does not float readily using, for example, laurel amine or anionic collectors. Adsorption of the sodium oleate on the monazite increases with an increase in pH, indicating that monazite does not float in acid pH, while pyrochlore is readily floatable and is depressed at a pH greater than 10. Figure 24.1 shows the effect of pH on flotation of monazite, pyrochlore and zircon. [Pg.153]

Floatability of bastnaesite found in barite-fluorite ores is extremely poor using either fatty acid flotation or sodium oleate. Research work conducted on an ore from Central Asia showed that the floatability of bastnaesite improved significantly after barite preflotation [5]. The flotation of bastnaesite from a carbonatite ore improved with the use of oleic acid modified with phosphate ester. The flotation of bastnaesite from deposits ofpegmatitic origin can be successfully accomplished with several types of collectors, including tall oil modified with secondary amine, and tall oil modified with petroleum sulphonate-encompassing group. [Pg.154]

Limited research work has been conducted on these ores, but have indicated that REO cannot be recovered using either fatty acid or sodium oleate. It was, however, found that a mixture of sulphosuccinamate and phosphate ester modified with alkylsulphate can recover REO and zircon efficiently. Figure 24.5 shows the effect of above collector mixture (KBX3) on REO recovery from complex RE0-Zr02 ores. Oxalic acid and fatty acid (FA3) were not so effective compared to collector KBX3. [Pg.157]

As can be seen from the data shown in Figure 24.5, poor results were achieved using either fatty acid or sodium oleate collector. [Pg.157]

The collector used in this experiment was sodium oleate at additions of 300 g/t. In addition to sodium oleate, other fatty acid collectors were examined. The results are given in Table 24.10. From these data, the saturated fatty acid soap was a poor collector for monazite, as well as sodium laurate. [Pg.165]

The acintols (mixture of oleic and linoleic acids) were found to give better results compared to sodium oleate. This can be attributed to the presence of linoleic acid, which has two double bonds. Furthermore, the rate of monazite flotation increased with the acintol than with the sodium oleate. [Pg.165]

Experimental work was carried out on black sand in which the effect of sodium oxalate on monazite activation was examined. It should be noted that monazite is essentially a phosphate of cerium and lanthanum, where the possibility exists that sodium oxalate has an activating effect on monazite [11]. The use of sodium oleate as activator was studied with different sulphonate collectors (Table 24.12). [Pg.167]


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Aqueous Solutions of Sodium Oleate

Interfacial tension sodium oleate

Micelles of sodium oleate

Oleates

Raman spectra of aqueous sodium oleate

Sodium oleate critical micelle concentrations

Water sodium oleate

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