公开(公告)号：US10745627B2

公开(公告)日：2020-08-18

申请号：US14734328

申请日：2015-06-09

Applicant: ExxonMobil Research and Engineering Company

Inventor： Mohsen Shahmirzadi Yeganeh ,  Robert P. Lucchesi ,  Jessica Lynn Hegner ,  Richard W. Flynn

IPC: C10G33/02 ,  C10G31/08 ,  C10G32/02 ,  C10G33/04 ,  B01D17/04 ,  B01D17/06 ,  C10G19/02 ,  C02F1/463

Abstract: A petroleum desalting process is improved by introducing the an alkaline compound such as sodium carbonate into the water phase, preferably in the vicinity of the water/oil interface which forms between the oil and water layers. This makes the rapid and effective separation of the oil and water phases from the emulsion layer possible.

公开(公告)号：US10745626B2

公开(公告)日：2020-08-18

申请号：US14556398

申请日：2014-12-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： Mohsen Shahmirzadi Yeganeh ,  Daniel Patrick Cherney ,  Robert P. Lucchesi ,  Pawel L. Peczak ,  Yibing Zhang ,  Richard W. Flynn

IPC: C10G32/02 ,  C10G31/08 ,  C10G33/04 ,  B01D17/06 ,  B01D17/04 ,  C10G33/02 ,  C02F1/463

Abstract: A petroleum desalting process in which the role played by the oil/bulk-resolved-water interface in the dehydration of the stabilized emulsion which forms in the desalter is recognized. The desalting process is improved by introducing the demulsifier and chemical high voltage electrodes. Water droplets in the mixture coalesce and settle towards the bottom of the vessel. A stabilized emulsion layer formed from the oil and the water with additives into the water phase and/or injecting chemical additives directly in the vicinity of the water/oil interface. This improved methodology that makes the rapid and effective delivery of chemical demulsifiers to the rag layer and/or oil/bulk-resolved-water interface possible. In operation, the desalting is carried out by mixing a crude oil to be desalted with water and passing the mixture of oil and water to the desalter vessel. The mixture enters the desalting vessel in the form of an emulsified mixture which is then separated by application of an electric field between emulsion-stabilizing solids from the oil forms above the interface between the denser water layer and the supernatant oil layer. A chemical demulsifier is added to the water layer in the region of the stabilized emulsion layer and/or directly into the emulsion layer itself. The separated water is removed as effluent through a water outlet at the bottom of the vessel and desalted oil is removed from the oil layer through an oil outlet at the top of the vessel.