1
Larry A McDaniel: Nitration processes. Jerome A Gross, Jerome A Gross, November 4, 1986: US04621157 (9 worldwide citation)

The present invention relates to improvements in processes of preparing dinitrated aromatic compounds, particularly dinitrated aniline and dinitrated substituted aniline compounds, employing relatively dilute and then more concentrated nitric acid as the nitrating agent.


2
Larry A McDaniel: Nitration processes. Jerome A Gross, Jerome A Gross, February 20, 1990: USRE033168

The present invention relates to improvements in processes of preparing dinitrated .[.aromatic compounds, particularly dinitrated aniline and dinitrated substituted aniline compounds, employing relatively dilute and then more concentrated nitric acid as the nitrating agent.]. .Iadd.aniline and subst ...