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Method for improving the yield of heavy hydrocarbons in a thermal cracking process

  • US 6,464,858 B1
  • Filed: 08/25/1994
  • Issued: 10/15/2002
  • Est. Priority Date: 08/25/1994
  • Status: Expired due to Fees
First Claim
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1. A method comprising the steps of:

  • (a) contacting a tube of a cracking furnace with a composition having C5+ production enhancing properties containing tetrabutyltin and hexamethyldisiloxane to thereby provide a treated tube wherein said composition has a molar ratio of tetrabutyltin to hexamethyldisiloxane in the range of from about 1;

    10 to about 10;

    1;

    (b) charging a saturated hydrocarbon stream to said treated cracking tube operated under suitable conditions for cracking said saturated hydrocarbon stream;

    (c) producing a product stream having a concentration of hydrocarbon compounds having at least five carbon atoms greater than that of said product stream when the treatment of step (a) is not performed; and

    (d) recovering at least a portion of said concentration of hydrocarbon compounds having at least five carbon atoms.

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