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Method for refining or upgrading hydrocarbons with analysis

  • US 5,076,909 A
  • Filed: 08/27/1990
  • Issued: 12/31/1991
  • Est. Priority Date: 05/14/1988
  • Status: Expired due to Term
First Claim
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1. A process for refining or upgrading a petroleum hydrocarbon feed, in which samples of hydrocarbon oil produced in the process are each chromatographically analyzed to determine the level present of at least one component in the oil, and in which the operation of the process is controlled in dependence upon the determined level present of said at least one component, the analysis comprising the steps of:

  • (a) passing a mixture of the hydrocarbon oil and a carrier phase in contact with a first and second stationary phase over a time interval so as to retain the components of the hydrocarbon oil on the stationary phases wherein the first stationary phase comprises surface hydroxyl groups substantially all of which have been substantially fully functionalized with a charge transfer functionally selected from the group consisting of trinitroanilino propane, tetrachlorophthalimido propane, dinitrobenzoyl glycidyl propane, and tetranitrofluorenone and the second stationary phase comprises surface hydroxyl groups at least a portion of which have been substantially fully functionalized by a functionalilty selected from the group consisting of aminopropyl, cyanopropyl, nitropropyl, and a combination thereof;

    (b) passing in contact with the first and second stationary phases a mobile phase of a weak solvent having a solubility parameter of 7.0 to 7.8 cal0.5 /cm1.5 for a second time interval sufficient to elute saturates and mono aromatics from the first stationary phase;

    (c) continuing passing the weak solvent to the second stationary phase for a third time interval sufficient to complete substantially the elution of mono aromatics;

    (d) recovering solvent passed to the first and second stationary phases;

    (e) monitoring solvents recovered in step (d) and detecting at least saturates, mono aromatics, and aromatics of two or more rings.

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