Isofeed

Description

 Isofeed A key feedstock for gasoline production in modern refineries

Isofeed is a heavy petroleum cut obtained from the vacuum column of crude distillation units. It is used as the primary feedstock for hydrocracking units (Hydrocracking / Isomax). Its technical and economic role in refineries is mainly defined by its contribution to high-quality gasoline production.

In refinery configuration, Isofeed is one of the most important streams that enables increased gasoline output without increasing crude oil intake.

Role of Isofeed in gasoline production

The hydrocracker unit is the main consumer of Isofeed. In this unit, heavy hydrocarbon molecules are broken down under high pressure, hydrogen, and catalysts into lighter fractions.

The output of this process directly enters the gasoline production chain:

Naphtha as a direct feed for catalytic reforming
Gasoline-range fractions with upgradeable octane number
LPG as a light by-product

The produced naphtha is then sent to the catalytic reforming unit, where its octane number is increased and it is converted into finished gasoline.

In practice, Isofeed is one of the most important refinery streams for increasing gasoline production capacity in complex refining systems.

Isofeed-to-gasoline conversion cycle

Industrial process in sequence:

Isofeed enters the hydrocracking unit
High-pressure hydrogen is injected
Heavy molecules are broken on catalysts
Naphtha and light fractions are produced
Naphtha is sent to the reforming unit
High-octane gasoline is produced

The result of this chain is the transformation of a heavy, low-value feedstock into a high-value product: gasoline.

Why Isofeed is important for gasoline production

It increases gasoline production capacity without increasing crude oil consumption
It enables the use of heavier and lower-value feedstocks
It improves the efficiency of hydrocracking and FCC units
It produces naphtha that can be upgraded into high-octane gasoline

In modern refineries, Isofeed is effectively a gasoline production optimization tool, not just a secondary stream.

Technical characteristics relevant to gasoline production

Density: 900 to 915 kg/m³
High boiling range: above 300 to 500°C
Sulfur content: 1.5 to 2.5%
Nitrogen compounds: 800 to 1500 ppm

These properties show that Isofeed is not a light fraction designed for direct use, but rather a feedstock specifically suitable for hydrocracking to produce convertible light streams.

Conclusion

Isofeed is a strategic feedstock in the gasoline production chain. Its main value lies in its ability to be converted into naphtha and subsequently high-octane gasoline through hydrocracking and catalytic reforming units.

In modern refineries, Isofeed is considered a key input for maximizing gasoline output and optimizing refining efficiency.

In other words, it is one of those streams that quietly does the heavy lifting while everyone else takes credit for the gasoline.