Patents by Inventor Ashok Basawanthappa Giriyalkar

Ashok Basawanthappa Giriyalkar 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).

  • Solvent extraction process for recovery of uranium from phosphoric acid (25-55% P205)
    Patent number: 6645453
    Abstract: An improved process of extraction of uranium from phosphoric acid and in particular uranium VI from phosphoric acid especially strong phosphoric acid using a selective synergistic extractant mix of an organo-phosphorous acid and a neutral extraction agent. The process basically involves the steps of extraction comprising contacting said acid with a selective synergistic extractant system of di-nonyl phenyl phosphoric acid (DNPPA) and a neutral agent selected from di-butyl butyl phosphonate (DBBP) and tri-n-octyl phosphine oxide (TOPO); and recovering the uranium values from the loaded organic phase. The above process would provide for an improved process for recovery of uranium both from weak and strong phosphoric acids using a stable and relatively cheap extractant system. The process is directed to improved recovery of U-VI from phosphoric acid by way of a simple, industrially applicable and cost-effective process.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: November 11, 2003
    Assignee: Secretary, Department of Atomic Energy, Government of India
    Inventors: Harvinderpal Singh, Shyamkant Laxmidutt Mishra, Ravishankar Vijayalakshmi, Ashok Basawanthappa Giriyalkar, Chiranjib Kumar Gupta
  • Solvent extraction process for recovery of uranium from phosphoric acid (25-55% P2O5)
    Publication number: 20030113247
    Abstract: An improved process of extraction of uranium from phosphoric acid and in particular uranium VI from phosphoric acid especially strong phosphoric acid using a selective synergistic extractant mix of an organo-phosphorous acid and a neutral extraction agent. The process basically involves the steps of extraction comprising contacting said acid with a selective synergistic extractant system of di-nonyl phenyl phosphoric acid (DNPPA) and a neutral agent selected from di-butyl butyl phosphonate (DBBP) and tri-n-octyl phosphine oxide (TOPO); and recovering the uranium values from the loaded organic phase. The above process would provide for an improved process for recovery of uranium both from weak and strong phosphoric acids using a stable and relatively cheap extractant system. The process is directed to improved recovery of U-VI from phosphoric acid by way of a simple, industrially applicable and cost-effective process.
    Type: Application
    Filed: September 7, 2001
    Publication date: June 19, 2003
    Inventors: Harvinderpal Singh, Shyamkant Laxmidutt Mishra, Ravishankar Vijayalakshmi, Ashok Basawanthappa Giriyalkar, Chiranjib Kumar Gupta