Here, we fabricated new cellulosic composites with excellent mechanical performance, especially the wet strength. Interestingly, the as-synthesized composite paper showed water-responsive shape retention.
Lithium
extraction from spodumene (LiAlSi2O6) is of
great importance to meet the increasing demand for lithium-ion
batteries used in electric energy storage. However, conventional processing
of spodumene involves enormous consumption of H2SO4 during the neutralization step. We propose a new flowsheet
to avoid wasting H2SO4 by adding a cooling crystallization
step to crystallize lithium sulfate as Li2SO4·H2O. To advance the process development, the solubilities
of Li2SO4·H2O in the system
H2SO4–MgSO4–H2O from 283.15 to 353.15 K were measured experimentally via a dynamic
method. Chemical modeling for the solubility was carried out by regressing
the mixed solvent electrolyte model parameters with the average absolute
relative deviation of less than 2%. The newly built model is capable
of calculating the solubility of Li2SO4·H2O in aqueous H2SO4–MgSO4 solutions in wide concentration and temperature ranges. Cooling
crystallization of Li2SO4·H2O in concentrated H2SO4 was conducted and its
feasibility was proved.
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