Refining of crude Li2CO3 via slurry phase dissolution using CO2

Advantages of pH and Temperature Control in the Carbonation Stage for Li2CO3 Production with Sulphated Liquors

“…The experimental results indicate that reaction (2) is not intensive since a low formation of HCO 3 À was observed. In the theoretical results in Figure 2, the possible formation of aqueous lithium bicarbonate is observed when increasing the pH from 5.1 to 12 (at 20°C and 0.85 atm); this observation agrees with that detected experimentally by Yi et al (2007). [14] Note that by increasing the pH above 11, the lithium carbonate is present since the presence of carbonate ions are predominant.…”

“…In the theoretical results in Figure 2, the possible formation of aqueous lithium bicarbonate is observed when increasing the pH from 5.1 to 12 (at 20°C and 0.85 atm); this observation agrees with that detected experimentally by Yi et al (2007). [14] Note that by increasing the pH above 11, the lithium carbonate is present since the presence of carbonate ions are predominant. Simultaneously, sodium compounds could be formed (NaHCO 3 , Na 2 CO 3 ⋅H 2 O), but due to their low concentration, they are not visible in this figure.…”

“…On the other hand, for the research carried out with synthetic solutions to obtain Li 2 CO 3 , many lithium reagents have been used to simulate real leaching solutions of different chemical systems. Some of these reagents are LiOH, [4,10] LiCl, [11][12][13] Li 2 CO 3 of low purity, [14] and Li 2 SO 4 . [6,15] In the majority of these works, the carbonation stage was carried out by injecting CO 2 (g) , except for the research done by Linneen et al [11] and Hongting and Gisele, [15] who added potassium carbonate (K 2 CO 3 ) and Na 2 CO 3 , respectively.…”

Crystallization kinetics of Li2CO3 from LiHCO3 solutions

“…LiNbO 3 and LiTaO 3 crystals), preparation of battery-grade lithium metal, etc. [1]. In recent years, with the development of battery and single crystal industries in the world, the demand for it is dramatically growing, whereas its supply is in some degree lacking.…”

Coupled reaction and solvent extraction process to form Li2CO3: Mechanism and product characterization

“…A possible process for the recovery of lithium from salt lake brines in China, including extraction, washing, and stripping, has been described in our previous work where LiCl was the main product. Li 2 CO 3 is an important chemical compound used in various industrial fields, such as application for CO 2 absorbent, pharmaceutical applications, production of electronic grade crystals, especially as an important material for Li ion batteries . With the development of Li ion batteries and single crystal industries in the world, the synthesis of Li 2 CO 3 has attracted increased attention recently.…”