New Invention Profile
| Publication No: | IN202311010693 [India] | Application No: | IN202311010693 |
| Title: | Process for extraction of lithium as high pure lithium carbonate from spodumene ore/concentrate | ||
| Publication Date: | 23-08-2024 | File Date: | 16-02-2023 |
| Inventor(s): | Devabrata Mishra; Kamala Kanta Sahu; Saurabh Shekhar; Manoj Kumar Mohanta; Shobhana Dey; Kalicharan Hembrom; Tanusree Dutta; Rahul Kumar | ||
| IPC Classification: | C22B 26/12, C01D 15/08, C22B 59/00, C22B 1/02, C22B 3/00 | ||
| Abstract: | The present invention provides an efficient process for extraction of Li from spodumene ore/concentrate, with an overall Li recovery efficiency higher than 91%. The invented process employs (i) lime (CaO) aided roasting of spodumene for favorable structural disruption of the refractory a- phase to reactive ? phase; (ii) innovative chloride leaching process for dissolution of 99% Li from the roasted ore/concentrate; and (iii) hydrothermal technique for 99% impurities removal wherein, Li loss during impurity precipitation is minimized. The overall Li recovery achieved is higher than 91%. The purified leaching solution (Li-brine), was taken for precipitation of high pure industrial grade Li2CO3 having purity 99.3%. |
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CSIR-National Metallurgical Laboratory[CSIR-NML]
: director[at]nmlindia[dot]org
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: director[at]nmlindia[dot]org
:91-657-2345202
:https://www.nml.res.in
Industrial Applications
Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes]
Energy Storage [Energy]
Metal Recyling [Metallurgy]