Patent ID: 9012700
Filing Date: 2015-04-21
Classification: C07C

Abstract:
1. A method for producing nitrobenzene by comprising: a) nitrating benzene with nitric acid or a mixture of nitric acid and sulfuric acid and subsequently phase separating into an aqueous phase and an organic phase containing nitrobenzene, b) washing the organic nitrobenzene containing phase obtained in step a) in at least one wash and subsequently phase separating into an aqueous phase and an organic phase containing nitrobenzene, c) washing the organic nitrobenzene-containing phase obtained in step b) in at least one alkaline wash with an aqueous solution of a base selected from the group consisting of d) washing the organic nitrobenzene-containing phase obtained in step c) in at least one wash with an aqueous solution of a potassium salt and subsequently phase separating into an aqueous phase and an organic phase containing nitrobenzene, e) washing the organic nitrobenzene-containing phase obtained in step d) in at least one neutral wash with water subsequently phase separating into an aqueous phase and an organic phase containing nitrobenzene, f) processing the organic nitrobenzene-containing phase obtained in step e) to obtain purified nitrobenzene.