Recent Patents on Corrosion Science

Oleg L. Figovsky  
R&D of International Nanotechnology Research Centre
Migdal HaEmek


Naphthenic Acid Corrosion Control Strategies in Refineries: A Review of Recent Patents

Author(s): Yongfeng Duan, Fengchang Yu, Zhongqiang Cui.


A review of recent patents on naphthenic acid corrosion (NAC) control strategies in refineries from 2000 to 2011 is presented in this paper. The patents mainly concentrate on corrosion inhibitors and removal of naphthenic acids. The corrosion inhibitor consists of phosphorous inhibitors and non-phosphorous inhibitors; the removal of naphthenic acids includes solvent extraction, chemical conversion, thermal treatment, and hydroprocessing. Advantages and disadvantages of various NAC control strategies are outlined. In addition, a further development of NAC control strategies is prospected.

Keywords: Naphthenic acid corrosion, corrosion inhibitors, removal, thermal treatment

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Article Details

Year: 2012
Page: [142 - 147]
Pages: 6
DOI: 10.2174/2210683911202020142
Price: $100