Fatty acids metal salts

In a typical example of reactive extraction a fatty acid ester was easily formed by adding a small amount of an alcohol to a fatty acid metal salt and extracting at 315 °C [647]. This method was applied to PP/calcium stearate and PP/zinc stearate containing pellets the presence of the fatty acid metal salts was confirmed by GC-MS. 

Fatty acid metal salts. A, hydrophobic interactions B, polar interactions C, fibre surface. 

The in vitro oxidation products from tocopherol have been studied in detail although less is known about its in vivo metabolism. The oxidation of a-tocopherol is light-catalysed and accelerated by unsaturated fatty acids, metal salts and alkali. The structure of many of the products from chemical oxidation has been established (ref. 98). It is used in the form of the unnatural acetate in which form it may well be more chemically stable although the manifestation of antioxidancy requires the presence of the free phenol since its radical is stabilised by resonance and by steric effects with the participation of several contributory structures. It has been suggested, as mentioned earlier, that the activity of vitamins E and C are related synergistically and evidence from pulse radiolysis has supported this augmenting interaction on the effect of vitamin E (ref.130), depicted in the equation. 

Release agents, such as fatty acid metal salts like zinc stearate and calcium stearate, are added. These materials do not act satisfactory at-high temperature applications. 

LC polyester can be blended with, a particulate titanium oxide and fatty acid amide/ fatty acid metal salt to mold a highly reflecting mirror [138],... 

Dibasic salts of dicyclopentadiene dicarboxylic acid are claimed to be active as corrosion inhibitors [444], Certain salts of fatty acids (metal soaps), together with benzotriazole, are claimed to give synergistic effects for corrosion in antifreeze-agent formulations [446]. 

Solubility differences of fatty acid salts In 1828, Gusserow introduced a method that lead salts or soaps of fatty acids in ether can be separated depending on the solubility differences. Saturated and unsaturated fatty acids form salts with metallic ions (e.g., Li) whose solubihties in water and organic solvents vary with the nature of the metallic ion and the chain length, degree of unsaturation, and other characteristics of the acid radicals. Substitution of ethanol for diethyl ether (113) allows better separation. 

Introduction. The object of this experiment is to illustrate a number of general reactions of carboxylic acids. Salt formation is a characteristic property of the carboxyl group. The salts of the alkali metals as a rule are soluble. The higher, sparingly soluble, fatty acids form salts which give colloidal dispersions. The soluble salts are prepared by neutralization of the acid with alkali, or by boiling with an excess of the metallic carbonate and evaporating the solution. 

Synonyms Coconut fatty acids, magnesium salts Fatty acids, coco, magnesium salt Fatty acids, coconut oil, magnesium salt Definition Magnesium salt of coconut acid Uses Emulsifier, surfactant in cosmetics in food-pkg. adhesives, food-contact resinous/polymeric coatings for polyolefin films, paper/paperboard in contact with aq./fatty foods, food-contact cellophane defoamer in food-contact coatings/paper surf, lubricant in mfg. of food-contact metallic... 

CAS 61790-32-7 EINECS/ELINCS 263-124-6 Synonyms Fatty acids, tallow, potassium salts Tallow fatty acids, potassium salts Definition Potassium salt of tallow acid Toxicology TSCA listed Uses Surfactant, emulsifier in cosmetics in food-pkg. adhesives defoamer in food-contact paper coatings in cellophane for food pkg. in resin-bonded filters for food contact in food-contact rubber articles, textiles in surf, lubricants for mfg. of food-contact metallic articles... 

Alkali metal alkanesulfonates containing an average of 11-21 carbon atoms are used as viscosity regulators for highly concentrated a-sulfo fatty acid ester salt solutions (more than 30% surfactant), so that the detergent is flowable and pumpable [94]. 

Other (than alkali) metal salts of fatty acids (- metallic soaps) can be produced by s. or reaction of - fatty acids with the respective metal(hydr)oxide. For further details about fatty acid salts - soaps and - metallic soaps. 

C12H24O, CH3 [CH,]io COOH. Needles, m.p. 44 C, b.p. 225"C/I00mm. A fatty acid occurring as glycerides in milk, spermaceti, laurel oil, coconut oil, palm oil and other vegetable oils. The metal salts are widely used. 

The effect is more than just a matter of pH. As shown in Fig. XV-14, phospholipid monolayers can be expanded at low pH values by the presence of phosphotungstate ions [123], which disrupt the stmctival order in the lipid film [124]. Uranyl ions, by contrast, contract the low-pH expanded phase presumably because of a type of counterion condensation [123]. These effects caution against using these ions as stains in electron microscopy. Clearly the nature of the counterion is very important. It is dramatically so with fatty acids that form an insoluble salt with the ion here quite low concentrations (10 M) of divalent ions lead to the formation of the metal salt unless the pH is quite low. Such films are much more condensed than the fatty-acid monolayers themselves [125-127]. 

Sodium compounds are important to the paper, glass, soap, textile, petroleum, chemical, and metal industries. Soap is generally a sodium salt of certain fatty acids. The importance of common salt to animal nutrition has been recognized since prehistoric times. 

Critical micelle concentration (Section 19 5) Concentration above which substances such as salts of fatty acids aggre gate to form micelles in aqueous solution Crown ether (Section 16 4) A cyclic polyether that via lon-dipole attractive forces forms stable complexes with metal 10ns Such complexes along with their accompany mg anion are soluble in nonpolar solvents C terminus (Section 27 7) The amino acid at the end of a pep tide or protein chain that has its carboxyl group intact—that IS in which the carboxyl group is not part of a peptide bond Cumulated diene (Section 10 5) Diene of the type C=C=C in which a single carbon atom participates in double bonds with two others... 

Other Reactions of Phospholipids. The unsaturated fatty acid groups in soybean lecithin can be halogenated. Acetic anhydride combined with the amino group of phosphatidylethanolamine forms acetylated compounds. PhosphoHpids form addition compounds with salts of heavy metals. Phosphatidylethanolamine and phosphatidjhnositol have affinities for calcium and magnesium ions that are related to interaction with their polar groups. 

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