Method of preventing corrosion of oil pipelines, storage structures and piping

摘要

Corrosion of ferrous material such as steel or stainless steel is a problem in oil pipelines, oil storage tanks, and the piping and process equipment at oil refineries, and this corrosion may be reduced by reducing the TAN value of the oil feedstock that is used/transported within the ferrous material. This TAN value may be reduced by reacting the oil feedstock with an alkali metal, thereby forming a de-acidified alkali metal. The de-acidified alkali metal has a TAN value of less than or equal to 1 mgKOH/g.

主权项

1. A method comprising:
electrochemically producing an alkali metal in its metallic state, reacting an oil feedstock comprising naphthenic acids with the alkali metal in its metallic state to form a de-acidified oil feedstock, and processing and/or transporting the de-acidified oil feedstock in a ferrous material,
whereinthe oil feedstock has a TAN value greater than or equal to 1 mg KOH/g, andthe de-acidified oil feedstock has a TAN value that is at or near 0 mg KOH/g.