Reduce salt corrosion rates with stronger base amines
When processing discounted crude oils, one of the primary challenges refiners face is under-salt corrosion in crude unit distillation overhead systems.
When processing discounted crude oils, one of the primary
challenges refiners face is under-salt corrosion in crude unit
distillation overhead systems. The combination of higher
overhead chloride levels and the presence of amine contaminants
in discounted crudes can greatly increase the risk of salt
formation. For those overhead systems where amine salt
corrosion cannot be mitigated by conventional methods, the
application of nontraditional neutralizing amines can be
beneficial. In particular, under-salt corrosion rates produced
by stronger base amines are significantly less than those of
weaker bases found as contaminants, such as ammonia or
monoethanolamine. Corrosion rates can also be reduced when the
weaker base contaminant salts are mixed with stronger base amine salts.
Significant reductions in corrosion rates have been confirmed
in both laboratory and field operating environments.
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