Sub-Product

Heavy Catalytic Naphtha (HCN) is a complex combination of hydrocarbons produced by the distillation of products from a catalytic cracking process. It consists of hydrocarbons having carbon numbers predominantly in the range of C₇ through C₁₂ and boiling in the range of approximately 120°C to 210°C (248°F to 380°F) as shown in the attached image^[2].

Composition

The composition of heavy catalytic naphtha varies depending on the specific process conditions and hydrocarbon source. However, it typically contains:

• Predominantly non-aromatic hydrocarbons (naphthenes and paraffins)
• A smaller proportion of aromatic hydrocarbons (it may contain 10 vol. % or more benzene)
• A relatively large proportion of branched and cyclic hydrocarbons

Uses

Heavy cut catalytic naphtha is primarily used as a feedstock for:

• Catalytic reforming to produce high-octane gasoline
• Hydrotreating to remove impurities and produce a cleaner product
• Blending with other petroleum products to enhance their properties

References

1. Brave Search Summarizer, Heavy cut catalytic naphtha.
2. Warren Averill, 2024, Full Conversion Petroleum Refinery Handbook for Operators, Chapter 1, Refinery Overview, Provided by Visual Performance Solutions, Inc.