A process is provided for preparing 4-hydroxy-3-nitrobiphenyl from 4-hydroxy-biphenyl by nitrating in the position adjacent to the phenolic hydroxyl group in high selectivity and yield, and the nitric acid used as the nitrating reagent is metered into the reaction system in a specific manner.

Un proceso es proporcionado para preparar 4-hydroxy-3-nitrobiphenyl de 4-hydroxy-biphenyl nitratando en la posición adyacente al grupo phenolic del oxhidrilo en altas selectividad y producción, y el ácido nítrico usado como el reactivo de nitratación se mide en el sistema de reacción de una manera específica.

 
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