Patents by Inventor Seshadri Seetharaman

Seshadri Seetharaman 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: 9404167
    Abstract: Method for producing nano sized ferrite particles from a metallurgical slag, the method including the steps of: a) providing a ladle with a molten slag including CaO, SiO2, FeO, and at least one of MnO, Cr2O3, V2O3. b) oxidizing the slag at a temperature in the interval of 1573K-1773K (1300-1500° C.) for 10-90 minutes, c) removing at least a portion of the slag from the ladle d) cooling the removed slag portion to a temperature below 373K (100° C.), e) extracting nano sized manganese ferrite and/or chromium ferrite and/or vanadium ferrite particles from the cooled portion.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: August 2, 2016
    Assignee: Jernkontoret
    Inventors: Anna Nakano, Seshadri Seetharaman, Volodymyr Shatokha
  • Publication number: 20150307957
    Abstract: Method for producing nano sized ferrite particles from a metallurgical slag, the method including the steps of: a) providing a ladle with a molten slag including CaO, SiO2, FeO, and at least one of MnO, Cr2O3, V2O3. b) oxidizing the slag at a temperature in the interval of 1573K-1773K (1300-1500° C.) for 10-90 minutes, c) removing at least a portion of the slag from the ladle d) cooling the removed slag portion to a temperature below 373K (100° C.), e) extracting nano sized manganese ferrite and/or chromium ferrite and/or vanadium ferrite particles from the cooled portion.
    Type: Application
    Filed: September 7, 2011
    Publication date: October 29, 2015
    Applicant: JERNKONTORET
    Inventors: Anna NAKANO, Seshadri SEETHARAMAN, Volodymyr SHATOKHA
  • Patent number: 9150973
    Abstract: A process for recovering at least one metal from a metal containing resource, in particular containing at least one metal oxide. The process including the step: providing a crucible containing a chloride salt melt, at least one cathode and an anode connected to the salt melt, heating means for heating the salt melt, and an aluminum melt present at the bottom of the crucible, said aluminum melt forming a part of the anode.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: October 6, 2015
    Assignee: JERNKONTORET AB
    Inventors: Lidong Teng, Seshadri Seetharaman, Sridhar Seetharaman
  • Publication number: 20150203979
    Abstract: The invention concerns a process for recovering at least one rare earth metal (REM) from the group of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. A chloride salt melt is provided and aluminium chloride is used to chlorinate a REMcontaining resource. The REM can be recovered by electrolysis, vaporisation or hydrometallurgical methods.
    Type: Application
    Filed: August 14, 2013
    Publication date: July 23, 2015
    Applicant: JERNKONTORET
    Inventors: Seshadri Seetharaman, Lidong Teng, Sridhar Seetharaman, Barati Mänsoor
  • Publication number: 20150159237
    Abstract: The invention concerns a Method of recovering values from aluminum dross comprising the steps of: a1) dissolving the aluminum dross in water thereby forming a salt solution, NH3 containing gas, and solid residues; b1) separating the NH3 containing gas; and c1) reacting the NH3 containing gas with CO2 in CO2 containing water saturated to at least 20% of maximum CO2 saturation to form ammonium carbonate and/or ammonium bicarbonate. According to another embodiment, the method comprises the steps of: a2) dissolving the aluminum dross in CO2 containing water saturated to at least 20% of maximum CO2 saturation, thereby forming a salt solution, and solid residues; and b2) separating the solid residues from the salt solution.
    Type: Application
    Filed: May 27, 2013
    Publication date: June 11, 2015
    Inventors: Lidong Teng, Mai Zhand, Seshadri Seetharaman
  • Publication number: 20150139873
    Abstract: The invention relates to a method for the extraction of vanadium from various sources in the form of vanadiumpentoxide, V2O5, from a source containing vanadium. The method includes the steps of: providing a source of V2O5, heating the source to a temperature of at least 1000° C., evaporating V2O5 from the heated source and recovering the evaporated V2O5.
    Type: Application
    Filed: July 3, 2013
    Publication date: May 21, 2015
    Inventors: Seshadri Seetharaman, Sridhar Seetharaman, Lidong Teng, Piotr Scheller
  • Publication number: 20140212347
    Abstract: Lead and/or Indium cam be recovered from cullet containing indium and/or lead, such as cullet from CRTs and flat panel displays. A chloride salt melt including AlCl3 is used to dissolve the cullet. The melt may be electrolyzed and the lead and/or indium and other metals may be selectively electro-deposited from the salt melt. The two steps may be combined in a continuous process. The salts in the salt melt are not consumed but can be recycled, with exception of the flux due to formation of chlorine gas and alumina. It is also possible to recover lead and/or indium and other metals from the salt melt by vaporizing the respective chlorides and condensing them, or by leaching the salt phase in water and extracting the metals as hydroxides by hydrometallurgy methods.
    Type: Application
    Filed: August 17, 2012
    Publication date: July 31, 2014
    Applicant: JERNKONTORET AB
    Inventors: Lidong Teng, Seshadri Seetharaman, Katsunori Yamaguchi, Yukari Izumi
  • Publication number: 20140166502
    Abstract: A process for recovering at least one metal from a metal containing resource, in particular containing at least one metal oxide. The process including the step: providing a crucible containing a chloride salt melt, at least one cathode and an anode connected to the salt melt, heating means for heating the salt melt, and an aluminum melt present at the bottom of the crucible, said aluminum melt forming a part of the anode.
    Type: Application
    Filed: August 17, 2012
    Publication date: June 19, 2014
    Applicant: JERNKONTORET AB
    Inventors: Lidong Teng, Seshadri Seetharaman, Sridhar Seetharaman
  • Patent number: 8470271
    Abstract: A process for chlorinating ore, slag, mill scale, scrap, dust and other resources containing recoverable metals from the groups 4-6, 8-12, and 14 in the periodic table. The process comprises: a) forming a liquid fused salt melt consisting essentially of aluminum chloride and at least one other metal chloride selected from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, wherein the aluminum chloride content in the liquid salt melt exceeds 10% by weight; b) introducing the recoverable metal resources into said liquid salt melt: c) reacting the aluminum chloride as chlorine donor with said recoverable metal resource to form metal chlorides, which are dissolved in the salt melt; and d) recovering the formed metal chlorides from the salt melt.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: June 25, 2013
    Assignee: Salt Extraction Aktiebolag
    Inventors: Seshadri Seetharaman, Olle Grinder
  • Publication number: 20110058997
    Abstract: A process for chlorinating ore, slag, mill scale, scrap, dust and other resources containing recoverable metals from the groups 4-6, 8-12, and 14 in the periodic table. The process comprises: a) forming a liquid fused salt melt consisting essentially of aluminum chloride and at least one other metal chloride selected from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, wherein the aluminum chloride content in the liquid salt melt exceeds 10% by weight; b) introducing the recoverable metal resources into said liquid salt melt: c) reacting the aluminum chloride as chlorine donor with said recoverable metal resource to form metal chlorides, which are dissolved in the salt melt; and d) recovering the formed metal chlorides from the salt melt.
    Type: Application
    Filed: May 13, 2009
    Publication date: March 10, 2011
    Applicant: SALT EXTRACTION AKTIEBOLAG
    Inventors: Seshadri Seetharaman, Olle Grinder