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Methods of cracking a crude product to produce additional crude products

  • US 7,584,789 B2
  • Filed: 10/20/2006
  • Issued: 09/08/2009
  • Est. Priority Date: 10/24/2005
  • Status: Expired due to Fees
First Claim
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1. A method for producing hydrocarbons, comprising:

  • providing heat from one or more heaters to a subsurface formation to heat at least a portion of the formation;

    producing formation fluid from a portion of the subsurface formation;

    separating the formation fluid to produce a liquid stream;

    catalytically cracking at least a portion of the liquid stream in a first catalytic cracking system by contacting the liquid stream with a catalytic cracking catalyst to produce a crude product stream and a spent catalytic cracking catalyst;

    regenerating at least a portion of the spent catalytic cracking catalyst to produce a regenerated cracking catalyst;

    catalytically cracking a stream comprising gasoline hydrocarbons in a second catalytic cracking system by contacting the stream comprising gasoline hydrocarbons with at least a portion of the regenerated catalytic cracking catalyst to produce a second crude product stream, the second crude product stream comprising a used regenerated cracking catalyst and hydrocarbons having a carbon number of at least 2, wherein at least 30% by weight of the hydrocarbons having a carbon number of at least 2 are olefins;

    separating at least some olefins from the second crude product stream, wherein the separated olefins have carbon numbers from 2 to 5; and

    providing at least a portion of the used regenerated cracking catalyst from the second catalytic cracking system to the first catalytic cracking system.

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