Environmental Engineering Reference
In-Depth Information
PGS
10% NaOH
PGS
OH
SOCl
2
, 48 h
Dioxiane
PGS
Cl
N-methylimilazole
DMF, 8h
N
N
CH
3
Cl
-
PGS
+
figure 16.7
Preparation of the n-methylimidazole-modified palygorskite.
Heterogeneous route (a)
Homogeneous route (b)
H
3
CO
N
H
3
CO
Hectorite
+
Si
Cl
+
HS
N
H
3
CO
(CTS)
(MBI)
H
O
H
3
CO
H
3
CO
H
3
CO
N
Si
Cl
O
O
Hectorite
Si
S
N
(MBICTS)
+
H
+
N
HS
Hectorite
N
(MBI)
H
O
N
Si
S
Hectorite
O
O
N
(MBICTS)
H
(H
HOM
and H
HET
)
figure 16.8
Incorporation of mBI onto natural hectorite (Hect.) surface by heterogeneous (a) and homogeneous (b) processes.
