Injection of antifoulants into thermal cracking reactors

Details Injection of antifoulants into thermal cracking reactors Injection of antifoulants into thermal cracking reactors

C - Chemistry, Metallurgy

23

F

C23F 14/02 (2006.01) C07C 4/04 (2006.01) C10G 9/00 (2006.01) C10G 9/16 (2006.01)

Patent

CA 2102061

A liquid tin-containing antifoulant composition is injected into a metal-walled thermal cracking reactor tuba, concurrently with the injection of a gaseous stream (preferably a steam-diluted C2-C4 alkane stream), through a nozzle of an injection quill which is positioned in the center region of the reactor tube substantially parallel to the flow of the gaseous stream. A liquid tin-containing antifoulant is injected into a metal-walled thermal cracking reactor tube through a nozzle of an injection quill at a temperature of about 1000-1300°F while a gaseous stream (preferably a steam-diluted C2-C4 alkane stream) flows through the reactor tube, followed by raising the temperature to about 1400-1800°F. Preferably, the metal walls of the reactor tube are treated with steam after the antifoulant injection at about 1000-1300°F but before the antifoulant injection at about 1400-1800°F.

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