Patents Assigned to Borma B.V.
  • Method and apparatus for preparing aromatic hydrazo or diaminodiphenyl compounds
    Patent number: 4345978
    Abstract: A method and apparatus for preparing aromatic hydrazo compounds by electrochemical reduction of aromatic nitro compounds on a technical scale. The reaction is carried out continuously and in two steps, comprising a first step in which the aromatic nitro compounds are reduced to form the corresponding azoxy compounds, which are isolated, and a second step in which the azoxy compounds isolated are reduced to form the corresponding hydrazo compounds.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: August 24, 1982
    Assignee: Borma B.V.
    Inventors: Hans de Groot, Eeuwoud van den Heuvel, Embrecht Barendrecht, Leonard J. J. Janssen