Injection of Antifoulants Into Thermal Cracking Reactors

    公开(公告)号:CA2102061A1

    公开(公告)日:1994-07-14

    申请号:CA2102061

    申请日:1993-10-29

    Abstract: A liquid tin-containing antifoulant composition is injected into a metal-walled thermal cracking reactor tube, 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.

    ANTIFOULANTS FOR THERMAL CRACKING PROCESSES

    公开(公告)号:CA1228566A

    公开(公告)日:1987-10-27

    申请号:CA477727

    申请日:1985-03-28

    Abstract: The formation of carbon on metals exposed to hydrocarbon in a thermal cracking process is reduced by contacting such metals with an antifoulant selected from the group consisting of a combination of tin and phosphorus, a combination of phosphorus and antimony and a combination of tin, antimony and phosphorus.

    48.
    发明专利
    未知

    公开(公告)号:AT218608T

    公开(公告)日:2002-06-15

    申请号:AT96104603

    申请日:1996-03-22

    Abstract: The rate of formation of carbon on the surfaces of thermal cracking tubes and the production of carbon monoxide during thermal cracking of hydrocarbons are inhibited by the use of cracking tubes treated with an antifoulant, including tin compound, silicon compound and sulfur compounds in the presence of a reducing gas such as hydrogen. Additionally, the concentration of carbon monoxide in a pyrolytic cracking process product stream is reduced by the treatment of the thermal cracking tubes of such process with a reducing gas having a concentration of a sulfur compound.

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