Saponification


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Related to Saponification: Saponification value

saponification

[sə‚pän·ə·fə′kā·shən]
(chemistry)
The process of converting chemicals into soap; involves the alkaline hydrolysis of a fat or oil, or the neutralization of a fatty acid.

Saponification

 

the hydrolysis of carboxylic and derivatives, including esters, nitriles, and amides, for example

RCOOR’ + H2O → RCOOH + R’OH

Saponification is widely used in industry to produce acids and alcohols. Higher aliphatic carboxylic acids, glycerol, soaps, and stearic acid are formed upon saponification of fats.

saponification

The conversion into soap which occurs when an alkali, such as the lime in cement, reacts with oils in paint; destroys the adhesion and strength of oil-based paint films.
References in periodicals archive ?
The oil had 0.387+-0.043, 2.907+-0.197, 118.8+-2.997 and 188.83+-1.678 acid value, peroxide value, iodine value and saponification value, respectively.
The saponification number is expressed as the number of mg of KOH required to saponify 1g of the sample (Nayak and Patel, 2010).
Natural chemical changes Manmade chemical changes Photosynthesis Saponification in wet chemical fire extinguishers Combustion Combustion in fireworks and engines Oxidation Batteries This process is Top-level structuring.
Check the temperature; it should be a few degrees higher than when you last checked, because saponification generates heat.
Saponification value is inversely associated with molecular weight of oil's fatty acid content (Nasir et al., 2009).
In Table 1 can be seen that there is no statistically significant differences between the reactions of reduction, saponification and alkaline extraction with respect to whole body extracts of M.
The acidity index (AOCS Cd 3d-63), saponification index (AOCS Cd 3-25), unsaponifiable matter (AOCS Ca 6a-40), peroxide index (AOCS Cd 8-53), iodine index (AOCS Cd1b- 87), refractive index (AOCS Tp 1a-64) and density (AOCS To1a-64) were determined.
For home soap-makers, I recommend preparing hot-process soap (which I describe below) rather than cold-process because an exact amount or specific purity of lye isn't required for successful saponification. In hot-process soaps, saponification--the chemical reaction between lye and fat--is controlled by added heat, not by the pH.
Parameter Amount Density (g/[cm.sup.3]) 0.877 Saponification index (mg KOH/g) 188.68 Acidity index (mg KOH/g) 0.491 Iodine index (g [I.sub.2]/100 g) 90.08 Peroxide index (meq [O.sub.2]/kg) 0.83 FFA (%) 0.246 Table 2: Main groups identified in the FTIR spectra.
The saponification number (X) in of KOH/g product was calculated by the formula: X = ([V.sub.0] - V) x K x 5.6/m, where [V.sub.0] and V are the volumes of the hydrochloric acid solution consumed for titration in the blank test and the sample of the product, respectively.
Physicochemical properties such as moisture, color, freezing point AdegC, smoke point AdegC, refractive index (40AdegC), free fatty acids (FFA), saponification value, iodine value, peroxide value and fatty acids composition of industrially processed cottonseed oils were measured according to the American Oil Chemists Society (AOCS) methods [9]..
The chemical characteristics of B.toxisperma oil such as the peroxide, saponification and iodine values ranged from 2.13 to 2.69 mEq/kg, 182.13 to 188.30 mgKOH/g and 54.41 to 57.98 I2g/100g, respectively.