Patents Assigned to American Color And Chemical Corp.
  • Method for treatment of contaminated materials with superheated steam thermal desorption and recycle
    Patent number: 5656178
    Abstract: A method is provided for the treatment of contaminated materials such as impounded sludges and contaminated soils by thermal desorption wherein a solid matrix is subjected to the action of superheated steam in a closed vessel, a gas stream comprising superheated steam is recirculated to the vessel and recirculation of the superheated steam is continued until organic constituents are separated therefrom to predetermined concentrations that are environmentally insignificant and within the limits prescribed by governmental regulations.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: August 12, 1997
    Assignee: American Color And Chemical Corp.
    Inventors: Primo Marchesi, George M. Goyak
  • Process for preparing Acid Red 151
    Patent number: 4248777
    Abstract: A process for preparing a non-gelling Acid Red 151 is provided. In the diazotization of aminoazobenzene monosulfonic acid in an aqueous mineral acid and the coupling of the diazotized amine with 2-naphthol in an aqueous alkaline solution, the mineral acid and alkali are chosen such that, in addition to forming the salt of the sulfonic acid group of the dye, disodium hydrogen phosphate salts are formed and left in solution in the final coupling mass.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: February 3, 1981
    Assignee: American Color & Chemical Corp.
    Inventor: Nancy E. Akers