Table 4 The chemical composition of K400 catalyst.

From: Modified natural kaolin clay as an active, selective, and stable catalyst for methanol dehydration to dimethyl ether

(Wt%)

SiO2

Al2O3

Fe2O3

CaO

MgO

SO3

Na2O

K2O

Mn2O3

TiO2

Loss

K400

44.67

29.87

0.70

7.77

0.38

0.53

0.17

0.22

0.23

0.48

14.98

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