Demulsifying crude oil emulsions

  • US 3,907,701 A
  • Filed: 06/05/1973
  • Issued: 09/23/1975
  • Est. Priority Date: 06/07/1972
  • Status: Expired due to Term
First Claim
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1. IN A PROCESS FOR RAPID DEHYDRATION OF A CRUDE OIL IN THE FORM OF A SALTWATER-IN-OIL EMULSION BY THE ADDITION OF A DEMULSIFYING COMPOUND BASED ON DERIVATIVES OF POLYALKYLENE OXIDES, THE IMPROVEMENT WHICH COMPRISES:

  • ADDING TO SAID CRUDE OIL A MINOR AMOUNT OF A SOLUTION CONTAINING IN AN AQUEOUS OR ORGANIC PHASE, AS THE ESSENTIAL DEMULFIFYING COMPOUND, A POLYALKYLENE POLYAMINE HAVING AT LEAST 50 AND UP TO 3,000 RECURRING ETHYLENE IMINE OR PROPLENE IMINE UNITS, WHICH POLYALKYLENE POLYAMINE IS TOTALLY ALKOXYLATED AT THE NITROGEN ATOMS WITH FROM 10 TO 300 MOLES OF ETHYLENE OXIDE AND/OR PROPYLENE OXIDE;

    AND THEN SEPARATING THE SALT-CONTAINING AQUEOUS PHASE FROM THE CRUDE OIL.

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