Recovery of Lithium Carbonate from Dilute Li-Rich Brine via Homogenous and Heterogeneous Precipitation
Authors/Creators
- 1. Università degli studi di Palermo, Dipartimento di Ingegneria, Viale delle Scienze, 90128 Palermo, Italy
- 2. Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstraße 2, Freiburg 79110, Germany
- 3. Chemical Engineering Department, Escola d′Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya (UPC)-BarcelonaTECH, C/Eduard Maristany 10−14, Campus Diagonal-Besòs, Barcelona 08930, Spain
Description
An extensive experimental campaign on Li recovery
from relatively dilute LiCl solutions (i.e., Li+ ∼ 4000 ppm) is
presented to identify the best operating conditions for a Li2CO3
crystallization unit. Lithium is currently mainly produced via solar
evaporation, purification, and precipitation from highly concentrated
Li brines located in a few world areas. The process requires
large surfaces and long times (18−24 months) to concentrate Li+
up to 20,000 ppm. The present work investigates two separation
routes to extract Li+ from synthetic solutions, mimicking those
obtained from low-content Li+ sources through selective Li+
separation and further concentration steps: (i) addition of
Na2CO3 solution and (ii) addition of NaOH solution + CO2
insufflation. A Li recovery up to 80% and purities up to 99% at 80
°C and with high-ionic strength solutions was achieved employing NaOH solution + CO2 insufflation and an ethanol washing step.
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Additional details
Related works
- Is cited by
- Journal article: 10.1021/acs.iecr.2c01397 (DOI)