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U.S. Department of Energy
Office of Scientific and Technical Information

Method of abating corrosion in crude oil distillation units

Patent ·
OSTI ID:5393780
This patent describes an improvement in a process for abating corrosion in a crude column overhead transfer line operated at at temperature above the nominal aqueous dew point in contact with a crude oil feed stream containing sulfur oxides, ammonia and a hydrochloric acid neutralizing corrosion inhibitor thus forming ammonium chloride and ammonium bisulfate. The improvement comprises maintaining a chloride level in the crude oil feed stream sufficient to provide a mole ratio of ammonium chloride to ammonium bisulfate of greater than about 20 in the crude column overseas system.
Assignee:
Shell Oil Co., Houston, TX
Patent Number(s):
US 4855035
Application Number:
PPN: US 7244239A
OSTI ID:
5393780
Country of Publication:
United States
Language:
English