Methods for removing iron from crude oil in a two-stage desaltin

Details Methods for removing iron from crude oil in a two-stage desaltin Methods for removing iron from crude oil in a two-stage desaltin

1990-08-01

1992-01-14

Myers, Helane E.

Mineral oils: processes and products

Refining

Metal contaminant removal

208251R, 208311, 208282, C10G 1700

Patent

active

050807790

ABSTRACT:
Methods of diminishing the content of soluble and insoluble forms of iron from crude are disclosed. Crude and water soluble chelant are mixed prior to addition of wash water. After wash water addition, an emulsion is formed. After resolution of the emulsion, iron laden water phase is separated resulting in decreased iron content in the crude. In a two-step desalting process, water soluble chelant is mixed with crude separated from the resolved emulsion emanating from the first, upstream, desalter. After such mixing, fresh wash water is added, with the so-formed crude/chelant/wash water mixture being fed to the second, downstream, desalter, for resolution. Crude separated from the second desalter has substantially diminished iron content compared to crude fed to the first desalter.

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