Solid

Solid proportion (%w/w_oil)

Acid number

(mg_KOH∙g⁻¹)

Neutralization

(%)

Activated carbon

5

0.43

14

Silica gel

0.48

4

Activated carbon + NaOH

0.43

14

CaCO₃

0.80

-

Na₂CO₃

0.35

30

MgO

0.15

70

Activated carbon + MgO

5 + 1

0.04

92