Patents

A process for the preparation of leachable (non-stoichiometric) manganese oxide from manganese containing industrial wastes and natural pyrolusite ores

A process for preparation of leachable (non-stoichiometric) manganese oxide from manganese containing industrial wastes and natural pyrolusite ores which comprises homogenizing powder of manganese containing industrial waste or manganese ore with 10-40 (w/w) low density oil (low density petroleum hydrocarbon) as a liquid state reducing agent, heating the above said resultant mixture in a reactor, at a temperature in the range of 250 ?C-700 ?C, for a period of 1-4 hours, allowing the reaction mixture to cool down to an ambient temperature, under reducing environment prevailing inside the reactor to obtain the crude reduced manganese oxide, leaching the resultant crude reduced manganese oxide with 10-50% w/v aqueous sulphuric acid, at a temperature of 25-100 ?C for 1-8 hours to obtain the manganese sulphate, converting the above said manganese sulphate into desired purified non-stoichiometric manganese oxide by known methods.

Patent Assignee: Council of Scientific & Industrial Research (CSIR)

Patent No: IN254799 [India]

Application No: 399/DEL/2006

Inventor(s): Navin Chandra , Amirtphale Sudhir Sitaram , Srabanti Ghosh , Murari Prasad , Deepti Sarkar

Issue Date: 19-12-2012

Filing Date: 13-02-2006

Licensing Option: Laboratory willing to jointly develop technology with industrial partner.

IPC Classification: C10F5/20