Where does the nitrogen trichloride in chlorine gas cylinders come from?

Refer to this post: http://bbs.hcbbs.com/viewthread.php?tid=596054

In the presence of ammonia, ammonium salts, or organic amines (such as urea), nitrogen-containing chlorides can be formed when exposed to chlorine, hypochlorous acid, or hypochlorites. However, whether the reaction product is an ammonium chloride or nitrogen trichloride depends on the conditions during the reaction. Under medium and low pressure production conditions, the reaction products are primarily determined by the pH value of the solution. When pH > 9, the reaction product is monochloroammonium or dichloroammonium ； NH3+Cl2＝NH2Cl+HCl NH3+2Cl2＝NHCl2+2HCl When pH

So, can nitric trichloride be formed inside the chlorine cylinder during its use? Will the generation of nitrogen trichloride occur when pushing the alkali tank during a leak?

Is the leader lying to you? Nitrogen trichloride is produced in electrolyzers during the production of chlor-alkali. Pushing the leaked chlorine cylinders into the alkali tank is the correct approach. However, an adequate amount of alkaline solution or make-up water is required to keep the temperature within a certain range; otherwise, an increase in temperature can indeed lead to an explosion.

This post was last edited by wdh2010 on 2010-4-19 at 13:12. It is unlikely for chlorine and nitrogen to directly form nitric trichloride. These conditions are also quite stringent; if nitric trichloride can be produced, we won’t dare to use nitrogen as a protective gas in our chlorine handling process. However, sodium hydroxide should be used in the alkali tank, not ammonia water

Will there be nitrogen trichloride in that chlorine buffer tank?

From ahhoyang’s reply, it seems that the main purpose is to prevent the mixing in of amine substances. But it’s hard to anticipate everything, so it’s better to take the safest approach.

The accident tank in our liquid chlorine cylinder filling area is filled with an alkaline solution, with a concentration of around 18-20%. Chlorine reacts with alkalis to produce sodium hypochlorite and salts. In the process of absorbing waste gases, alkali solutions are also used to absorb chlorine; it is important to control the temperature carefully, as high temperatures can cause sodium hypochlorite to decompose and release chlorine gas. Nitrogen trichloride is generated during the electrolysis process and concentrated in the liquidation process; the amine content is controlled at the source of brine. It is sufficient to regularly discharge liquid chlorine from the liquid chlorine storage tanks and the bottom of separators. The nitrogen trichloride content is analyzed during such discharges, and if it is too high, the frequency of discharge is increased.

Currently, the measure taken to prevent chlorine leaks is the use of liquid alkali. I’ve never heard that liquid alkali can react with chlorine to produce nitrogen trichloride; your supervisor is ignorant in scientific matters – without substances such as ammonia, amines, or nitrogen compounds entering the alkali tank, nitrogen trichloride will not be formed

There can’t be nitric trichloride; it’s just that the concentration of nitric trichloride inside the liquid chlorine cylinder might be high