Environmental Engineering Reference
In-Depth Information
Table 5.18
Speci
cation of diethylene glycol for nitration reaction
Parameter
Value
Color/appearance
Colorless, odorless, transparent liquid
Density (20
°
C)
1.1157
1.1165
-
H
2
O (%)
<0.5
Acidity (%, H
2
SO
4
-based)
<0.02
°
Saponi
cation value (%, Na
2
O-based)
<0.05
Chloride
Trace
Reducing substance
0.00
Glycol (%)
<2.00
Distillate (%)
99 % in 241.0
246.5
°
C,
-
1.0 % in 247
249
°
C
-
Fig. 5.11
Facilities and control systems of preparation of diethylene glycol dinitrate. 1 Open
nitration reactor, 2 stability treatment vessel, 3 temperature-controlled meter, 4 frequency variator
The nitration temperature in the reaction process is not more than 25
°
C. It will
take 25 min to
finish the nitration reaction. All materials in the reactor after nitration
will be cooled down below 15
C for separation process. The crude product will be
water-washed and stability treated. The composition of separated waste acid, which
will be treated for denitration, is listed in Table
5.19
.
°
