Silver Nitrate → Silver behenate

HRID 1763790Notes

Reaction equation

HRID 1763790 reaction equation
[C:1]([O-:24])(=[O:23])[CH2:2][CH2:3][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][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22].[Na+].[N+]([O-])([O-])=O.[Ag+:30]>O>[C:1]([O-:24])(=[O:23])[CH2:2][CH2:3][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][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22].[Ag+:30]

Participants

4

Reactant 2

HCID 24470Silver NitrateHCID 23668838Sodium Behenate

Product 1

HCID 164971Silver behenate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

The second method will be explained in more detail. An organic silver salt oxidizing agent is uniformly dispersed in a sensitizing dye solution and the oxidizing agent having the dye adsorbed thereon is separated, followed by washing with a solvent capable of dissolving the dye. The free sensitizing dye which is not adsorbed on the organic silver salt oxidizing agent is thereby removed. For example, the process for the preparation of silver behenate as the organic silver salt oxidizing agent may be practiced as follows. An equimolar amount of a sodium hydroxide solution is added to a warm ethanol solution of behenic acid to yield sodium behenate. Warm water is then added to dissolve the sodium behenate. An aqueous solution containing an equimolar amount of silver nitrate is dropwise added thereinto with stirring to yield white silver behenate. The obtained silver behenate is repeatedly washed with hot water and hot ethanol and then dried by heating under reduced pressure. The silver behenate is added to a solution of a sensitizing dye and uniformly dispersed by ball-milling. Subsequently this dispersion is separated into the colored silver behenate and the dye solution by centrifugation. For washing, the colored silver behenate is taken out and dispersed in a solvent containing no halogen and capable of dissolving the dye. The obtained dispersion is separated into the colored silver behenate and the dye solution by centrifugation. Such washing is repeated until the solvent layer is not colored. The silver behenate is colored by the dye. This colored silver behenate is taken out and dried. There is obtained the desired oxidizing agent containing the dye, substantially all of which is adsorbed thereon in the aggregate of micelles of silver behanate, without a free dye present.

Workup

  1. additionis dropwise added

Sources & evidence

ORD record
ord-e60318ef62154f82b3da9ea08e7f8a4c
Source dataset
uspto-grants-1978_09
Patent number
US04113496

Reaction notes

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