Patent ID: 8747658
Filing Date: 2014-06-10
Classification: B01D,C10G

Abstract:
1. A process for removing water from crude oil comprising: a) providing an oil and water feedstream comprising a crude oil and water mixture; b) separating the oil and water feedstream in a separator into at least outgoing streams including an outgoing crude oil stream, an outgoing wastewater stream and an outgoing rag layer stream, wherein the rag layer is an emulsion formed between the crude oil and water; c) removing said outgoing rag layer stream from said separator; d) centrifuging the rag layer stream from the separator in a disk stack centrifuge and separating the rag layer stream into at least three separate streams including an outgoing crude oil stream, an outgoing wastewater stream and an outgoing solids rich stream; e) removing a desalted crude oil stream; and f) removing a wastewater stream.