Palmitic Acid → Sodium palmitate

Reaktionsgleichung

[OH-].[Na+:2].[C:3]([OH:20])(=[O:19])[CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18]>C([O-])(=O)CCCCCCCCCCCCCCC.[Ag+].O>[C:3]([O-:20])(=[O:19])[CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[Na+:2]

Komponenten

Versuchsvorschrift

In the preparation of Types I & II silver palmitate, solution A was first prepared by adding 0.15 moles of solid sodium hydroxide to a dispersion of 0.1575 moles and 0.176 moles of palmitic acid respectively in 1L of deionized water at 68° C. thereby producing a solution of sodium palmitate with a pH of ca. 9. Solution B, 250 mL of 0.6M aqueous silver nitrate acidified 4 g of 65% nitric acid at a temperature of 58° C., was then added with vigorous stirring to solution A in 15 s while maintaining a temperature of 68° C. After 1 minute the resulting suspension of silver palmitate was cooled to room temperature and had a pH of ca. 5 and a UAg of ca. 350 mV. The silver palmitate was filtered off under reduced pressure, washed twice each time with about 5L of deionized water and dried in a forced air drying cupboard at 40° C.