Process  
 
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ETRO is produced via a proprietary selective catalytic dewaxing technology and derived from PSR-1 atmospheric residue. The atmospheric residue, known as Low Sulphur Waxy Residue (LSWR) is produced in PSR-1 crude distillation tower from Malaysian crude slate. Malaysian sweet crude oil is known for its high quality.
ETRO production comprises the following processes:


i. Vacuum distillation iii. Selective catalytic dewaxing
ii. Hydrotreating iv. Hydrofinishing

The LSWR is initially fed into a Vacuum Distillation Unit and fractionated into various hydrocarbon components. Through block operation, each component is further processed in the HDT/ MSDW Unit to uplift the VI.

Base Oil Production: MG3 Process Scheme
 



In the HDT/MSDW Unit, the components are hydrotreated to remove sulphur and nitrogen, both contaminants to downstream processes.

Post-hydrotreating, the waxy feed is selectively cracked and isomerised to improve its cold-flow properties. This stream is further passed through a polishing reactor to remove remnants of colour bodies and trace impurities.

PETRONAS Refinery Process Scheme Process (Block Operation)
  1. Condensate Fractionator
  2. Crude Distillation Unit 1
  3. Saturated Gas Regeneration Unit
  4. Naphtha Treating Unit
  5. MG3 Base Oil Plant
  6. Crude Distillation Unit 2
  7. Vacuum Distillation Unit
  8. Hydrocraker Unit
  9. Saturated Gas Concentration Unit
  10. Delayed Coker unit
    1. LPG
    2. DPK
    3. MOGAS (Export & Domestic)
    4. Premium Diesel
    5. Diesel (Export & Domestic)