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51313-02037-Reducing Salt Corrosion Rates with Stronger Base Amines

Picture for Reducing Salt Corrosion Rates with Stronger Base Amines
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Product Number: 51313-02037-SG
ISBN: 02037 2013 CP
Author: Joel Lack
Publication Date: 2013
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$20.00
$20.00

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 non-traditional neutralizing amines can provide benefit. 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 mono-ethanolamine. Corrosion rates can also be reduced when the weaker base contaminant salts are mixed with stronger base amine salts. Significant reductions in corrosion rate have been confirmed in both laboratory and field operating environments.

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 non-traditional neutralizing amines can provide benefit. 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 mono-ethanolamine. Corrosion rates can also be reduced when the weaker base contaminant salts are mixed with stronger base amine salts. Significant reductions in corrosion rate have been confirmed in both laboratory and field operating environments.

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This paper discusses common amine sources and amine identification methods, the equipment commonly impacted and the steps which can be taken to address the challenge of amine contamination.
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