Patents by Inventor Birger Langseth

Birger Langseth 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).

  • Patent number: 8114371
    Abstract: Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter, preferably mixing olivine and water to form an olivine/water slurry, mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a Concentration at 18 wt % or above, and at a temperature preferably between 50 -130° C., and reacting for a period of time, preferably between 20-360 minutes, removal of coarse mineral impurities (sand product), separation of precipitated silica from mother solution, mechanical treatment of the separated precipitated silica and optionally some water to obtain a slurry, preparation of a low viscosity slurry by adding sodium aluminate or another suitable aluminate, preferably to 100-6000 p.p.m., and adjusting the pH, preferably to values between 4-9 ageing at a temperature between 50-150° C.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: February 14, 2012
    Assignee: COD Technologies, a.s.
    Inventors: Gudmundur Gunnarsson, Oddmund Wallevik, Lars Øyvind Ekornrød, Birger Langseth, Per Bjøm Engseth
  • Patent number: 7763221
    Abstract: A novel process for complete utilization of olivine is based on purification of brine by oxidation and precipitation of iron and nickel compounds.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: July 27, 2010
    Assignee: Cod Technologies A.S.
    Inventors: Oddmund Wallevik, Tom Rames Jørgensen, Aage Aasheim, Birger Langseth
  • Publication number: 20090263657
    Abstract: Process for the production of precipitated silica from olivine including the following steps:—providing olivine particles with a particle size preferably below 1 mm in diameter,—preferably mixing olivine and water to form an olivine/water slurry,—mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a concentration at 18 wt % or above, and at a temperature preferably between 50-130° C., and reacting for a period of time, preferably between 20-360 minutes,—removal of coarse mineral impurities (sand product),—separation of precipitated silica from mother solution,—mechanical treatment of the separated precipitated silica and optionally some water to obtain a slurry,—preparation of a low viscosity slurry by adding sodium aluminate or another suitable aluminate, preferably to 100-6000 p.p.m., and adjusting the pH, preferably to values between 4-9—ageing at a temperature between 50-150° C.
    Type: Application
    Filed: January 13, 2005
    Publication date: October 22, 2009
    Inventors: Gudmundur Gunnarsson, Oddmund Wallevik, Lars Ekornrod, Birger Langseth, Per Engseth
  • Publication number: 20080075645
    Abstract: A novel process for complete utilization of olivine is based on purification of brine by oxidation and precipitation of iron and nickel compound.
    Type: Application
    Filed: June 6, 2005
    Publication date: March 27, 2008
    Applicant: COD TECHNOLOGIES A.S.
    Inventors: Oddmund Wallevik, Tom Jorgensen, Aage Aasheim, Birger Langseth
  • 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
  • Patent number: 6001316
    Abstract: Method of treatment of environmentally hazardous waste material and recovering MgCl.sub.2 brine, based on dissolving of the waste material in water and hydrochloric acid and simultaneous removal of ammonia at elevated temperatures, destruction of residual aqueous ammonia and removal of Mn, where the material is pre-treated in a special mixing unit adding water to provide a slurry and where hydrogen and other evolved gases are continuously diluted.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: December 14, 1999
    Assignee: Norsk Hydro ASA
    Inventors: Birger Langseth, Jean Beliveau, Bernard Perreault
  • Patent number: 5900151
    Abstract: Method for sulphate removal from concentrated MgCl.sub.2 solutions, where the solution is subjected to a high pressure nanofiltration process applying membranes having a dominantly negative surface charge.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: May 4, 1999
    Assignee: Norsk Hydro ASA
    Inventors: Thor Thorsen, Per Oscar Wiig, Ole W.ae butted.rnes, Birger Langseth, Carl Margcotte