Patents Assigned to Industrie Automation Sondertechnik GmbH & Co.
  • Process for the precipitation of phosphate with iron hydroxide
    Patent number: 5296151
    Abstract: A process is provided for the precipitation of phosphates from phosphate-comprising waters which utilizes iron hydroxide of the formula Fe.sub.2 O.sub.3.nH.sub.2 O wherein n=0.5-3.0. The iron hydroxide is prepared from natural or technical muds comprising iron in a process which involves dissolving with mineral acid and precipitation with a base. Other metal hydroxides are used together with the iron hydroxide.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: March 22, 1994
    Assignee: Industrie Automation Sondertechnik GmbH & Co.
    Inventors: German Muller, Siegfried Riethmayer
  • Process for the separation of heavy metals from waste materials
    Patent number: 5009793
    Abstract: A process for the heavy-metal decontamination of contaminated substances such as natural and industrial sludges, thermal residues and soils. The contaminated starting substance is treated with an acid and the dissolved metal salts are precipitated as metal hydroxides in the pH range of about 3.5-11. The exact control of the pH value makes it possible to isolate individual metal fractions which can be used as raw materials in the metallurgical industry.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: April 23, 1991
    Assignee: Industrie Automation Sondertechnik GmbH & Co.
    Inventor: German Muller