Patents by Inventor Arne Bent Frigstad

Arne Bent Frigstad 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).

  • Method of producing magnesium chloride granules
    Patent number: 6296790
    Abstract: A method of producing magnesium chloride granules with a particle size in the range from 0.4 to 3.0 mm suitable for fluidization, air drying and chlorinating to anhydrous state, by preparing a feed solution of MgCl2 having a 30-55% by weight of MgCl2, feeding the solution and keeping it at high temperatures from the feeding tank to the nozzles, atomisation of the feed solution into the bed of already dried particles by pressure or compressed air, passing preheated air upwardly through the bed, maintaining the particles in a fluidizing state and a bed temperature between 100-170° C., continuously recovering entrained particles in a cyclone, discharging magnesium chloride particles continuously, classifying discharged material and recycling of any undersized fraction and crushed oversize fraction together with fines from the cyclone to the fluid bed for further granulation.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: October 2, 2001
    Assignee: Norsk Hydro ASA
    Inventors: Birger Langseth, Arne Bent Frigstad, Leif K{dot over (a)}re Grønstad