Hydrochloric Acid Leaching Study of Rare Earth Elements from Moroccan Phosphate

Table 7

Characteristics of maximum response Y.

Response	Target value	Weight	di (%)	(%)	(%)	Cal. value	Exp. value
Y = REE (ppm)	8	1	100.00	93.17	100.00	7.99	7.12
Desirability	—	—	100.00	93.17	100.00	—	—

d_i: partial desirability of response Y_i; : minimal partial desirability of response Y_i; : maximal partial desirability of response Y_i; Cal. value: calculated value; and Exp. value: experimental value.