Friction reduction using a viscoelastic surfactant

Details Friction reduction using a viscoelastic surfactant Friction reduction using a viscoelastic surfactant

C - Chemistry, Metallurgy

09

K

31/66

C09K 3/00 (2006.01) F17D 1/16 (2006.01)

Patent

CA 1180176

ABSTRACT OF THE DISCLOSURE This invention is directed to a method for reducing friction exhibited by an aqueous liquid passing through a conduit under nonlaminar flow conditions and to aqueous liquid compositions having such reduced friction containing a viscoelastic surfactant and an organic electrolyte. The method comprises passing through a conduit an aqueous liquid containing (1) a surfactant compound having a surfactant ion and (2) an organic electrolyte having a moiety that is capable of associating with the surfactant ion to form a viscoelastic surfactant, the viscoelastic surfactant being present in an amount sufficient to reduce the friction of the aqueous liquid as it passes through the conduit and the organic electrolyte being present in an amount sufficient to further reduce the friction exhibited by the aqueous liquid containing the viscoelastic surfactant as it passes through a con- duit under conditions of nonlaminar flow. The aqueous liquid compositions are useful in district heating systems, drilling fluids, waste water systems and as a carrier in transporting coal slurries and other minerals. 28,258-F

414512

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