Pyrolysis furnace feed

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking

Reexamination Certificate

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Details

C208S04800Q, C208S125000, C208S128000, C208S130000, C208S132000, C208S178000, C585S647000, C585S648000, C585S652000

Reexamination Certificate

active

07625480

ABSTRACT:
The invention relates to a method for processing asphaltene-containing feed to a pyrolysis furnace by raising the final boiling point of the feed/steam mixture to the pyrolysis furnace to ensure fouling occurs lower in the convection section where the mixture of air and steam can burn off fouling deposits during decoking operations. The final boiling point of the feed stream is increased by adding a heavy essentially asphaltene-free high boiling point hydrocarbon to the feed stream before the feed stream enters the convection section of the pyrolysis furnace, whereby said fouling occurs lower in the convection section.

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Moore et al., “Next Generation Polyalphaolefins—the Next Step in the Evolution of Synthetic Hydrocarbon Fluids,” www.innovene.com, Innovene USA LLC, (Nov. 22, 2005).

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