What is the crystallization temperature of ammonium hydrosulfide approximately?
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I have a gentle question: what is the crystallization temperature of ammonium hydrosulfide approximately? I read an expert article which stated that according to API932-A, the crystallization temperature of NH4HS is usually between 27 and 67 degrees; however, another description in the same article mentioned that the crystallization temperature of NH4HS in the high-pressure air coolers of hydrogenation units is generally 121 degrees. I don’t quite understand why ammonium thiocyanate has such a wide range of crystallization temperatures. Are 27–67 the crystallization temperatures of NH4HS at normal pressure, while 121 is the crystallization temperature under high pressure? Those who know, please explain it. Thank you
The crystallization temperature of ammonium hydrosulfide (NH4HS) does indeed vary depending on pressure conditions. Generally, 27-67 degrees refers to the crystallization temperature range at standard pressure. 121 degrees refers to the fact that, under specific high-pressure conditions, such as those in the high-pressure air cooling systems of hydrogenation units, the crystallization temperature of ammonium hydrosulfide increases significantly. Therefore, it is normal for the crystallization temperatures of ammonium hydrosulfide to vary under different pressure conditions. .