Process for steam cracking heavy hydrocarbon feedstocks

Details Process for steam cracking heavy hydrocarbon feedstocks Process for steam cracking heavy hydrocarbon feedstocks

2005-02-28

2010-10-26

Nguyen, Tam M (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S130000, C208S128000, C585S648000, C585S652000

Reexamination Certificate

active

07820035

ABSTRACT:
A process for cracking heavy hydrocarbon comprising heating the heavy hydrocarbon feedstock, mixing the heavy hydrocarbon feedstock with a fluid and/or a primary dilution steam stream to form a mixture, flashing the mixture to form a vapor phase and a liquid phase, separating and cracking the vapor phase, and cooling the product effluent in a transfer line exchanger, wherein the amount of the fluid and/or the primary dilution steam stream mixed with the heavy hydrocarbon feedstock is varied in accordance with at least one selected operating parameter of the process, such as the temperature of the flash stream before entering the flash/separator vessel.

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