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:
Dec. 12, 2023
Filed:
Feb. 19, 2019
Total SE, Courbevoie, FR;
Stéphane Jouenne, Bizanos, FR;
Bertrand Levache, Peyrehorade, FR;
TOTAL SE, Courbevoie, FR;
Abstract
The invention relates to a method for determining the intrinsic viscosity [η] of an aqueous polymer solution at a temperature T, wherein the aqueous polymer solution comprises at least one acrylamide-based polymer in an aqueous solvent, the aqueous solvent having a salinity of from 6 to 250 g/L, the method comprising the steps of: —providing a single universal relation Rbetween (i), the product of polymer concentration and intrinsic viscosity C·[η], and (ii) specific viscosity at zero shear rate η; —performing a measurement of the dynamic viscosity of the aqueous polymer solution at one polymer concentration C, at temperature T and at various shear rates; —determining from said measurement the zero-shear viscosity ηof the aqueous polymer solution at polymer concentration Cand at temperature T; —calculating the specific viscosity at zero shear rate of the aqueous polymer solution at polymer concentration C and at temperature T as η=(η−η)/η, where ηis the zero-shear viscosity of the aqueous solvent; —estimating the intrinsic viscosity [η] of the aqueous polymer solution at temperature T by applying the universal relation Rto the calculated specific viscosity at zero shear rate ηand polymer concentration C.