Preparation and Properties of Liquid Nitrate Ester - Liquid Explosives - page 238

Table 5.35 The relationship between nitration temperature and stability of nitroglycerine
Nitration temperature ( ° C) Content of residue acid Heat resistance in Abel test (min)

HNO 3 (%) H 2 SO 4 (%)

15 0.0132 0.0024 15

25 0.0057 0.0017 24

40 0.0052 0.0008 30

Table 5.36 The vapor
pressure of nitroglycerine at
different temperatures

Temperature ( ° C) Vapor pressure (mmHg)

20 0.00025

30 0.00038

35 0.0020

40 0.0024

45 0.0072

50 0.0081

60 0.0188

70 0.043

80 0.095

93 0.29

Table 5.37 The evaporation
heat

Temperature (K) ʔ H (kJ/mol)

ʔ H of nitroglycerine at
different temperature

100 86.36

140 85.27

180 84.14

and 125 C at 2 mmHg. The relationship between the vapor pressure of nitro-

glycerine and temperature is shown in Table 5.36 .
The evaporation heat

°

ʔ H of nitroglycerine is nearly not in

fl uenced by temper-

ature, as shown in Table 5.37 .
The vapor pressure of the binary solution of nitroglycerine and glycol dinitrate
was calculated, as shown in Table 5.38 .
Nitroglycerine is volatile. The amount of volatilization of 20 g nitroglycerine,
which was put in an open glass tube with a diameter of 70 mm at different tem-
perature for 24 h, is shown in Table 5.39 .
The weight loss of nitroglycerine based on volatilization is not only related to
temperature, but related to the contact area. The weight loss of nitroglycerine at
60

C is 0.11 mg/cm 2 /h.
The speci

°

c gravity of nitroglycerine is slightly decreased with increasing
temperature, as shown in Table 5.40 .