Patents by Inventor Adolf Staffe

Adolf Staffe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of dichlorophene
    Patent number: 4127735
    Abstract: An improvement in a process for the preparation of dichlorophene by reacting p-chlorophenol with formaldehyde in the presence of sulfuric acid. The improvement lies in contacting p-chlorophenol with the stoichiometric excess of formaldehyde in aqueous sulfuric acid by introducing into a sulfuric acid reaction medium 1 to 6% by weight of the total amount of p-chlorophenol to be reacted and thereafter adding the formaldehyde and additional p-chlorophenol to the reaction mixture in an amount such that at the end of the addition of the p-chlorophenol only 85 to 98% by weight of the total amount of formaldehyde has been added. The balance of the formaldehyde is then introduced into the reaction mixture.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: November 28, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Staffe, Klaus-Friedrich Lehment, Wilhelm Backhaus
  • Process for preparing sulfonic acid fluorides
    Patent number: 4060549
    Abstract: Sulfonic acid fluorides are prepared by reacting sulfonic acid halides with inorganic fluorides in an organic-aqueous phase. The reaction is carried out in the presence of catalytic amounts of an amine or an onium salt.
    Type: Grant
    Filed: March 4, 1976
    Date of Patent: November 29, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Arthur H. Schmidt, Reinhard Lantzsch, Albrecht Marhold, Klaus-Friedrich Lehment, Adolf Staffe