The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 1993
Filed:
Jan. 27, 1992
Jean-Pierre Binon, Saint-Raphael, FR;
Total Compagnie Franciase des Petroles, Paris, FR;
Abstract
An emulsifying agent according to formula (I) having a molecular weight of between 3000 and 10000: ##STR1## where A represents a terminal group for polyacrylates R.sub.1 represents an oleyl group containing up to 20 mol % stearyl groups: R.sub.2 is a residue with the formula --(CH.sub.2 H.sub.4 O).sub.x (C.sub.3 H.sub.16 0).sub.y --CH.sub.3, where x is between 8 and 24 and y is between 0.75 and 2.25; l is between 1 and 3 is between 0.85 and 3.5; and n is between 0.12 and 0.5. A method of forming a reverse emulsion using this emulsifying agent. A heavy reverse emulsion, without solids comprising: 10 to 70% by volume of a dispersed brine phase having a density of between 1.20 and 2.77; 90 to 30% by volume of a continuous oil phase, and 15 to 60 g/liter of this emulsifying agent.