Petroleum Refinery Engineering
Higher viscosity of lubricating oil usually signifies

Lower flash point and fire point
Higher acid number
Lower Reid vapour pressure
Higher flash point and fire point

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Petroleum Refinery Engineering
Polymerisation

Causes aromatics to combine with each other
Is aimed at producing lubricating oil
Causes olefins to combine with each other
Produces i-octane from cracked gases containing i-butane and butene

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