Environmental Engineering Reference
In-Depth Information
uence of reaction conditions and the production
processes of mixed acid injection nitration and air-agitated nitration [ 5 , 13 , 86 , 87 ].
These processes were successfully applied in the industrial manufacture of NG.
The writer [ 13 ] studied the in
fl
A. The control process conditions of the preparation of nitroglycerine in indirect
nitri
cation
(a) Nitri
cation and separation
The composition of mixed acid
HNO 3
48
52
%
H 2 SO 4
49
52
%
H 2 O0
:
2
0.5
%
:
SO 3
k
2
0
%
:
%
The nitration coef
ash
\
0
5
cient is in the range of 4.9
5.3. Temperature during
-
nitri
cation.
The onset temperature is below 5
C.
The reaction temperature is in the range of 15
°
18
°
C.
-
The
C.
The temperature during nitration is below the range of 25
final temperature is lower than 22
°
28
°
C
-
The temperature of glycerinum is 30
C.
The temperature for refrigerating chilled solution is
35
°
-
5to
15
°
C.
The speed of drop is 10
13 kg/min.
The speed of air string is 2
-
3 min/ET.
The composition of waste acid is
-
HNO 3
8
¥
%
H 2 SO 4
67
¥
%
H 2 O
k
18
%
N 2 O 4
k
0
:
3
%
:
%
Ratio of waste acid is 1.70
NG
k
2
2
1.71.
-
(b) Washing process
The temperature during cold water washing process is 20
25
°
C, the time is 6 min.
-
The temperature during warmwater washing process is 30
35
°
C, the time is 6 min.
-
The stability temperature during washing process is 40
45
°
C, the time is 6 min.
-
B. The control process condition during the preparation of nitroglycerine in
injection nitri
cation
(a) The composition of mixed acid is
HNO 3
48
50
%
H 2 SO 4
50
52
%
:
H 2 O
\
0
2
%
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