Table 2.

Subsequent stages of the use and recovery of cerium compounds.

Stage No.	Stage
I	Precipitation of phosphates(V) (a)
II	Filtration (a)
III	Sludge extraction (a)
IV	Filtration (a)
V	Precipitation of cerium(III) oxalate (a)
VI	Filtration, management of filtrates (a,b)
VII	Thermal decomposition (a)
VIII	Synthesis of cerium(III) chloride (a,b)
IX	Crystallisation (a)
X	HCl recovery (b)

a—results from our previous studies [35,38]. b—results from studies conducted by other authors [39,40].