Sodium soap grease

Grease is primarily a soap and lube oil mixture. The properties of grease are determined in large part by the properties of the soap component. For example, sodium soap grease is water soluble and not suitable for water contact service. A calcium soap grease, on the other hand, can be used in water service. The soap may be purchased as a raw material or may be manufactured on site as an auxiliary process. 

C Calcium soap grease. D Sodium soap grease. E Lithium soap... 

Greases may contain soaps of lithium, calcium, sodium, aluminium, etc., or they may be non-soap greases. 

Mahogany acids oil-soluble sulfonic acids formed by the action of sulfuric acid on petroleum distillates. They may be converted to their sodium soaps (mahogany soaps) and extracted from the oil with alcohol for use in the manufacture of soluble oils, rust preventives, and special greases. The calcium and barium soaps of these acids are used as detergent additives in motor oils see also Brown acids and Sulfonic acids. 

Andok C Channelling grease with sodium soap thickener, derived from Coray 55... 

Figure 18-1. Soap fibers from greases, photographs of replicas taken by electron microscopy. (a), (b) Lithium 12-hydroxystearate. (c) Lithium oleate. (d) Calcium-sodium soap. Fiduciary marks 1 nm...

GREASE, SODA BASED - A grease prepared from lubricating oil and sodium soap. 

Mixtures of calcium and sodium soaps give greases that will stand a higher temperature than a straight lime base grease but are not as water resistant as a soda base grease. 

Obviously, other operating conditions are employed for other greases e.g., sodium soap saponification is conducted at 500 F. In manufacturing aluminum greases, gel tanks are provided for the blended grease. 

The formation of micelles and their properties are responsible for the cleansing action of soaps Water that contains sodium stearate removes grease by enclosing it m the hydrocarbon like interior of the micelles The grease is washed away with the water not because it dissolves m the water but because it dissolves m the micelles that are dis persed m the water Sodium stearate is an example of a soap sodium and potassium salts of other C12-C1S unbranched carboxylic acids possess similar properties... 

In the other market areas, lead naphthenates are used on a limited basis in extreme pressure additives for lubricating oils and greases. Sodium and potassium naphthenates are used in emulsiftable oils, where they have the advantage over fatty acid soaps of having improved disinfectant properties. Catalyst uses include cobalt naphthenate as a cross-linking catalyst in adhesives (52) and manganese naphthenate as an oxidation catalyst (35). Metal naphthenates are also being used in the hydroconversion of heavy petroleum fractions (53,54) and bitumens (55). 

Lithium compounds are used in ceramics, lubricants, and medicine. Small daily doses of lithium carbonate are an effective treatment for bipolar (manic-depressive) disorder but scientists still do not fully understand why. Lithium soaps—the lithium salts of long-chain carboxylic acids—are used as thickeners in lubricating greases for high-temperature applications because they have higher melting points than more conventional sodium and potassium soaps. 

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