Increasing precipitation rate from sodium aluminate solution by adding active seed and ammonia

Lithium carbonate recovery from lithium-containing solution by ultrasound assisted precipitation

“…where, L TR is the lithium theoretical recovery rate, m is the mass of lithium carbonate precipitated completely, m d is the solubility of lithium carbonate in a specific temperature, C Li is the concentration of lithium, V is the solution volume, 6.94 is the molecular weight of lithium, 73.89 is the molecular of lithium carbonate. Ultrasound influences not only the crystallization ratio of supersaturated solution but also the size distribution of product [35]. In order to investigate the effect of ultrasound on lithium recovery rate and purity of Li 2 CO 3 , other parameters were selected as follows: solid Na 2 CO 3 , Na + to Li + of 1, at 343 K for 35 min.…”

Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)₃ Seed

“…The equilibrium concentration of Al2O3 was calculated using Equation ( 8) proposed by Mishra [21]: Ce = Na2Okexp(6.2106-2486.7/T+1.0875Na2Ok/T), (8) Figure 6 shows the results of experiments on the effect of precipitation time and temperature at Na2Ok = 150 g L -1 , αk = 1.5 and the active seed amount of 20 g L -1 . Figure 6.…”

“…Several methods have been proposed to enhance the precipitation rate and speed, such as mechanical or thermal activation of the industrial seed [4,5], active seed and additive application [6][7][8], and operating conditions optimization [9]. Seed surface purification from organic and nonorganic species can also enhance seeded precipitation rate [10][11][12] because adsorbed impurities on the seed surface can reduce the active site availability.…”

Enhanced phosphate removal with fine activated alumina synthesized from a sodium aluminate solution: performance and mechanism

“…By contrast, gibbsite or boehmite precipitated from industrial sodium aluminate solution generated in alumina refineries is remarkably inexpensive and has a minimal negative environmental impact because this process allows the sodium aluminate solution to be recycled and does not generate wastewater. 11 This method therefore represents a green, economical approach to synthesizing FAA having a high specific surface area (>300 m 2 g −1 ) as an alternative to nano-alumina.…”