Hydrogen Bromide → Silver bromide

Participants

Reaction Conditions

Reaction Steps

20 ml of a 2.5 wt% aqueous solution of hydrogen bromide was added to a solution of 8.6 g of capric acid in 100 ml of butyl acetate which was maintained at a temperature of 50° C. and stirred with a stirrer, resulting in the formation of an emulsion. 50 ml of an aqueous solution of silver nitrate-ammonium complex containing 8.5 g of silver nitrate (chill-set at 5° C.) was added dropwise into the resulting emulsion over a 30 second period to allow the capric acid and hydrogen bromide to react simultaneously with silver ion. Silver caprate and silver bromide were then formed at the same time. After removal of the aqueous phase, the butyl acetate phase containing both silver caprate and silver bromide was dispersed into 120 g of a 15 wt% isopropanol solution of polyvinyl butyral to form a polymer dispersion. The components (kept at 40° C.) set forth below were added to the polymer dispersion in their listed order at 5 minute intervals.

Provenance & Evidence