Environmental Engineering Reference
In-Depth Information
prevent triethylene glycol dinitrate from separation. The diluted waste acids need to
be treated immediately.
It is slow to separate triethylene glycol dinitrate from the waste acids. For
example, more than 30 min is needed by the gravimetric method. Thus, it would
raise the risk of operation.
The separated acidic triethylene glycol dinitrate is successively washed by water
twice, Na
2
CO
3
aqueous solution, and then water to alkalescence. The obtained
product should be tested in the Abel test. Based on literatures, the duration time is
not less than 20 min at 82
C.
The parameters of triethylene glycol for preparing triethylene glycol dinitrate are
listed in Table
5.21
.
The separated oily material is successively washed by water twice, Na
2
CO
3
aqueous solution, and then water. After washing and neutralization, the duration
time of the product of triethylene glycol dinitrate should not less than 20 min at
82
°
C and 40 min at 72
°
C.
500 kg triethylene glycol can produce 714.11 kg triethylene glycol dinitrate.
°
5.3.4 Property and Preparation of Glycerine Dinitrate [
3
,
15
]
Glycerine dinitrate, also called dinitro glycerine, is a viscous light yellow liquid
with lower explosive property than nitroglycerine. Glycerine dinitrate has two
isomers.
Table 5.21
Speci
cations of triethylene glycol
Parameters
Value
Color/appearance
Slightly odorous transparent yellow liquid
Density (20
°
C)
1.1217
Refractive index (20
°
C)
1.4552
H
2
O (%)
<0.1
Acidity (H
2
SO
4
-based)
<0.005
Saponification value (Na
2
O-based)
<0.630
Chloride
Trace
Reducing substance
0.00
Glycol (%)
0.00
Distillate in 278.8
-
310
°
C (%)
<95.2
Residues
<0.001
