Type
Solvent De-Asphalting
Process
Asphalt and Oil Processes
Abbreviation

A De-Asphalter is a Unit in a Crude Oil Refinery or Bitumen Upgrader that separates Asphalt from Crude Oil or Bitumen.

The De-Asphalter Unit is usually placed after the Vacuum Distillation Tower. It is usually a Solvent De-Asphalter Unit ("SDA"). The SDA separates the Asphalt from the Feedstock because Light Hydrocarbons will dissolve Aliphatic Compounds but not Asphaltenes. The Output from the De-Asphalter Unit is De-Asphalted Oil ("DAO") and Asphalt.

DAO from Propane De-Asphalting has the highest quality but lowest yield, whereas using Pentane may double or triple the yield from a Heavy Feed, but at the expense of Contamination by Metals and Carbon Residues that shorten the life of Downstream Cracking Catalysts. If the Solvent is Butane the Unit will be referred to as a Butane De-Asphalter ("BDA") and if the solvent is Propane, it will be called a Propane De-Asphalter ("PDA") Unit.

Link
https://en.wikipedia.org/wiki/De-asphalter
System Info

Updated by
UserPic  Kokel, Nicolas
Updated
11/25/2022 8:11 AM
Added
11/24/2022 8:29 AM
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Title Date
  Image
https://www.valv.com/industries/downstream-chemical-processing/de-asphalting-application-overview/ Simplified SDA Process Flow Diagram
RefiningCommunity.com https://youtu.be/Aa-W4d9MDmE The Role of Solvent De Asphalting in Refining