Fluid handling – Processes – Affecting flow by the addition of material or energy
Patent
1991-12-09
1993-12-21
Reddick, Judy M.
Fluid handling
Processes
Affecting flow by the addition of material or energy
523175, 524555, F17D 116, F17D 117
Patent
active
052714241
ABSTRACT:
A poly(vinylamine) which is preferably a poly(vinylamine) hydrochloride is an effective drag reducing agent in aqueous fluids under turbulent flow conditions. Apparently, because of its relatively low molecular weight, preferably in the range of about 5.times.10.sup.5 to 2.times.10.sup.6, this poly(vinylamine) is quite stable and maintains its drag reducing effectiveness over an extended period of usage, demonstrating superior stability to commercial polymers known as effective drag reducing agents. Effectiveness is demonstrated for both tapwater and seawater and the invention can be practiced with respect to fluids flowing through conduits or drag reduction for vessels passing through a body of water.
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W. M. Kulicke, et al, "Drag Reduction Phenomenon with Special Emphasis on Homogeneous Polymer Solutions," Advances in Polymer Science, vol. 89, (1989).
Air Products and Chemicals Inc.
Marsh William F.
Reddick Judy M.
Rodgers Mark L.
Simmons James C.
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