Glyceryl

SNG Substitute natural gas. soaps Sodium and potassium salts of fatty acids, particularly stearic, palmitic and oleic acids. Animal and vegetable oils and fats, from which soaps are prepared, consist essentially of the glyceryl esters of these acids. In soap manufacture the oil or fat is heated with dilute NaOH (less frequently KOH) solution in large vats. When hydrolysis is complete the soap is salted out , or precipitated from solution by addition of NaCl. The soap is then treated, as required, with perfumes, etc. and made into tablets. 

When a mixture of anhydrous glycerol and crystalline oxalic acid, (C00H)2,2H lO, is heated the glycerol undergoes esterification, givang first glyceryl monoxalate (A) the latter, however, decomposes as the temperature... 

CH2(0H)CH(0H)CH2(0H) + HCOOH reaches about 100°, losing carbon dioxide and giving glyceryl monoformate (B). On further heating, particularly if more oxalic acid is added, the mono formate is hydrolysed (the necessary water being provided both by the oxalic acid and by the first reaction), and consequently a distillate of aqueous formic acid is obtained. 

If the reaction mixture used in the above preparation of formic acid is heated to 190-200°, the glyceryl monoformate which has escaped hydrolysis undergoes decomposition, with the loss of carbon dioxide and water, and the... 

The neutral glyceryl oxalate (C), which is also formed in the reaction... 

If, on the other hand, RCOOH is a higher fatty acid and R OH a polyhydric alcohol, then the enzyme is called a lipase. Stearin or glyceryl tristearate (a fat) is... 

Fatty acids occur naturally m forms other than as glyceryl triesters and we 11 see numerous examples as we go through the chapter One recently discovered fatty acid derivative is anandamide... 

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