Nitrogen trichloride vapor pressure

Uninsulated tanks have a maximum gaseous discharge rate of ca. 2 t/h. The chlorine gas can be used only for low-pressure chlorination processes and at low rates. This method increases the risk of concentrating nitrogen trichloride and other nonvolatile residues in the liquid phase within the tank. In all other circumstances, the liquid chlorine should be transferred into a fixed storage vessel and then vaporized in a special installation. 

When large amounts of chlorine gas are required or when the chlorination process needs pressurized gas, liquid chlorine must be vaporized and superheated to avoid liquefaction [243], [244]. It is advisable to operate the vaporizer at a sufficiently high temperature to accelerate the decomposition of nitrogen trichloride. As a source of heat, steam with a maximum allowed temperature of 120 C is used when the vaporizing system is constructed of mild steel. Water above 60 C is also suitable, as shown in Figure 84. Direct electrical heating is not appropriate because there is always a risk of overheating the steel. 

---