Regarding the darkening (greening) of ammonium sulfide

2016-10-18View Original

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Recently, the color of the by-product ammonium sulfate has darkened (turned green). After conducting an analysis of the metal ions in ammonium sulfate, it was found that the iron ion concentration is more than 10 times higher than that in normal ammonium sulfate. I’m not sure where this iron comes from; please provide some guidance. Are there any other reasons that could cause ammonium sulfate to turn green?

Reply #22016-10-19

Check if there are any leaks in the pump cooling water, which might be leaking into the saturator

Reply #32016-10-20

It’s possible; additives can also be added to solve it

Reply #42016-10-20

Hello, OP – is it ammonium sulfide produced as a by-product of the caprolactam plant?

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Regarding the darkening (greening) of ammonium sulfide

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