* 13,000 tpd Refinery
* Naptha Refinery
* Hydrotreater
* Lube Oil Refinery
Process Units from 13,000 tpd (100,000 BPD) refinery
Process Units
1. 8500 tpd (60,000 bpd) Naphtha Minus Complex, NMC, with Hysomer and sieve section to increase octane from 66 to 88. built in 1991 as PAU’s (pre-assembled units) Feed – Naphtha, final product 90+ octane petrol – Shell Technology.
2. 3500 tpd (26,000 bpd) Hydocraker to produce naphtha from VDU bottoms. (2) 150 bar reactors, low pressure side 10-15 bar, high pressure side – 150 bar. Including (3) 2400 kw H2 compressors, 150 bar.
3. 2000 tpd (15,000 bpd) Keromode unit to upgrade cut of Naphtha from Hydrocraker to Kerosene for jet fuel.
4. 4500 tpd (34,000 bpd) Kerosene Hydrotreater, to remove sulfur and H2S from kerosene.
5. (2) 10 MW steam turbine generators, pass through turbine, 100 bar inlet, 17 bar exhaust, 2,800 tpd steam for each turbine.
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Units from Naphtha Refinery
1. 7,250 BPD cyclohexane plant, feedstock – toluene, benzene, hydrogen
2. Tank farm (tanks and spheres) from 50,000 bpd naphtha refinery – For Lease
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Hydrotreater
4,500 B/D Hydrotreater for desulphurization of diesel or gasoline, 600 psi pressure, dual reactor, built late 1980’s. Previously used for niche application by major international oil company.
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Process units from 30,000 barrels per day Lube OIL refinery
Process Units:
The manufacture of lubricating oil basestock/bitumen is done through five (5) distinct unit processes, namely:
High Vacuum Unit (HVU). The HVU processes the reduced crude (long residue) feedstock into four (4) distillate products. It also produces gas oil and a short residue bottoms product. Distillation is done by heating the feedstock to about 380°C and then feeding it into a vacuum tower where high vacuum is maintained.
Propane Deasphalting Unit (PDU). The PDU processes short residue (vacuum residue) from the High Vacuum Unit. The process employs the principle of solvent extraction to separate the lighter paraffinic fraction from the heavier asphaltic fraction of the charge stock. Liquid propane is used as the solvent which removes the deasphalted oil (DAO), leaving an asphalt stream behind for use in the manufacture of bitumen and fuel oil which are sold as secondary products. Propane extraction is accomplished in two extraction towers operated at about 30 bar.
Furfural Extraction Unit (FEU). The FEU processes distillates and DAO and uses furfural solvent to remove the aromatic molecules from the feed. A high level of aromatic components is detrimental to lube oil performance and so the majority is removed in this unit and blended into the refinery fuel oil pool.
MEK Dewaxing Unit (MDU). The MDU processes raffinates from the FEU and deasphalted oil (DAO) from the PDU. It uses a mixture of MEK (Methyl Ethyl Ketone) and Toluene as solvent in extracting wax from the lubeoil and makes it suitable for low temperature applications. The wax that is removed is either blended into fuel oil or sold as secondary product.
Bitumen Blowing Unit (BBU). The BBU and its attendant facility, was constructed to produce high quality bitumen that meets Shell brand specifications. The Bitumen Blowing Unit (BBU) improves the quality of the present paving grade production through oxy-conversion.
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