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Amine pump seals

Amine pump seals

(OP)
Hi,
I have read and seen in many instances mechanical seals in Amine (rich and lean) applications tend to have failures connected to crystallization of the amine on the atmospheric side of the seal. This is true in cases where a API 52 unpressuried plan is being used and therefore seal vendors recommend the use of a quench plan 62 to ensure this does not happen and cause seal failure.

Based on my process knoweldge I do not believe of Amines (MDEA) crystallize or polymerize, they do however form heat stable salts with various reactions. Is this formation of heat stable salts reffered to as crystallization when I see failure reports of mechanical seals. The process of forming heat stable salts is chemically reffered to a amine thermal degredation and not crystallization or polymerization.

I would appreciate feed back on the interchangeable use of terminology which to me means slightly different things. Is there literature out there that discuss specific crystallization issues of Amine on mechanical seals.

Thanks

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