Patents Assigned to Boliden Aktibolag
  • Method for producing basic aluminum sulphate (III)
    Patent number: 4563342
    Abstract: The present invention relates to a method for producing sulphate-poor, polynucleate aluminium hydroxide sulphate complexes of the general formula[Al(OH).sub.x (SO.sub.4).sub.y (H.sub.2 O).sub.z ].sub.nin which n is an integer; x is 0.75-2.0; y is 0.5-1.12; x+2y is 3; z is 1.5-4 when the product is in solid form, and z>>4 when the product is in the form of an aqueous solution, an amorphous aluminium hydroxide being admixed with aluminium sulphate and/or sulphuric acid to y=0.5-1.12; preferably 0.5-0.75.
    Type: Grant
    Filed: October 12, 1983
    Date of Patent: January 7, 1986
    Assignee: Boliden Aktibolag
    Inventors: Lennart K. Gunnarsson, Rolf O. Nilsson