Methane → 4-Sulfobenzenediazonium hydroxide

Participants

Reaction Steps

A solution of 43 g of sulfanilic acid in 2 L of water at about 75° C. was added to 202 g of a carbon black having a surface area of 230 m2 /g and a DBPA of 70 ml/100 g with stirring. The stirring mixture was allowed to cool to room temperature, and 26.2 g of concentrated nitric acid was added. A solution of 20.5 g of NaNO2 in water was added. 4-Sulfobenzenediazonium hydroxide inner salt is formed, which reacts with the carbon black. The dispersion was stirred until the resulting bubbling stopped. After drying at 70° C., the product was washed with methanol and dried in an oven at 90° C. The product has attached p-C6H4SO3- groups.

Provenance & Evidence