Why does a reddish-brown powder appear during the use of liquid chlorine?
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This post was last edited by sunjl1981 on 2013-1-6 at 23:58. During the use of liquid chlorine, a reddish-brown powdery substance is produced in the liquid chlorine evaporator. This reddish-brown powder is insoluble in water and does not absorb moisture; its iron content is around 40%, so it should be Fe2O3. But why is Fe2O3 formed during the use of liquid chlorine? Last time, the powder in the liquid chlorine evaporator was FeCl3; this time it is mainly Fe2O3. What is the main reason for this? ， ， -
This post was last edited by yidi2004 on 2010-7-2 08:26. The reddish-brown powder is insoluble in water; it tests acidic using a pH strip. The red powder is insoluble in alkalis, and it cannot be completely dissolved either by acids. Adding silver nitrate solution will cause whitening, indicating the presence of ferric chloride. Is the powder a mixture of iron chloride and iron oxide?
This post was last edited by yidi2004 on 2010-7-2 at 10:13. Iron trioxide is generally a product of the slow oxidation of iron in humid air. Is this phenomenon related to the presence of water in liquid chlorine? But the water content in the liquid chlorine we analyzed is only 50–80 ppm, which is not high!