Patents by Inventor Barsha Dash

Barsha Dash 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).

  • Hydrometallurgical process for the recovery of tellurium from high lead bearing copper refinery anode slime
    Patent number: 9630844
    Abstract: A hydrometallurgical process is provided for the recovery of tellurium as elemental tellurium powder from copper refinery anode slime containing high amount of lead. The process involves the removal of copper and lead from anode slime followed by the recovery of tellurium as elemental powders. An economical and environment friendly process is provided for producing tellurium from a high lead bearing anode slime as it involves only hydrometallurgical techniques and thereby avoids emission of any polluting gases and has an efficiency of 85 to 90%. The developed process of recovering tellurium as elemental powders from copper refinery anode slime is beneficial in the production of pure tellurium instead of tellurium compounds. It helps raise the profit margin of a non-ferrous metal industry dealing with extraction of copper from ores and treatment of anode slime for the recovery of other metal values.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: April 25, 2017
    Assignee: Council of Scientific & Industrial Research
    Inventors: Tondepu Subbaiah, Barada Kanta Mishra, Malay Kumar Ghosh, Kali Sanjay, Indra Narayan Bhattacharya, Chinmaya Kumar Sarangi, Barsha Dash, Abdul Rauf Sheik
  • HYDROMETALLURGICAL PROCESS FOR THE RECOVERY OF TELLURIUM FROM HIGH LEAD BEARING COPPER REFINERY ANODE SLIME
    Publication number: 20150053572
    Abstract: A hydrometallurgical process is provided for the recovery of tellurium as elemental tellurium powder from copper refinery anode slime containing high amount of lead. The process involves the removal of copper and lead from anode slime followed by the recovery of tellurium as elemental powders. An economical and environment friendly process is provided for producing tellurium from a high lead bearing anode slime as it involves only hydrometallurgical techniques and thereby avoids emission of any polluting gases and has an efficiency of 85 to 90%. The developed process of recovering tellurium as elemental powders from copper refinery anode slime is beneficial in the production of pure tellurium instead of tellurium compounds. It helps raise the profit margin of a non-ferrous metal industry dealing with extraction of copper from ores and treatment of anode slime for the recovery of other metal values.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 26, 2015
    Inventors: Tondepu Subbaiah, Barada Kanta Mishra, Malay Kumar Ghosh, Kali Sanjay, Indra Narayan Bhattacharya, Chinmaya Kumar Sarangi, Barsha Dash, Abdul Rauf Sheik