The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2017
Filed:
Aug. 19, 2014
Council of Scientific & Industrial Research, New Delhi, IN;
Tondepu Subbaiah, Orissa, IN;
Barada Kanta Mishra, Orissa, IN;
Malay Kumar Ghosh, Orissa, IN;
Kali Sanjay, Orissa, IN;
Indra Narayan Bhattacharya, Orissa, IN;
Chinmaya Kumar Sarangi, Orissa, IN;
Barsha Dash, Orissa, IN;
Abdul Rauf Sheik, Orissa, IN;
Council of Scientific & Industrial Research, New Delhi, IN;
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.