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Poly-¦Á-olefin Drag Reduction Agent Process Optimization And Molecular Association Dra Preliminary Study

Posted on:2007-03-25Degree:MasterType:Thesis
Country:ChinaCandidate:Y F SongFull Text:PDF
GTID:2191360185983699Subject:Chemical processes
Abstract/Summary:PDF Full Text Request
Drag reduction agent in oil fluids can improve flow quantity greatly and minish friction in a fully developed turbulent channel flow by the addition of small amounts of certain polymers. The addition of drag reduction agent improves transport capacity greatly, reduces transport cost, makes flexible transport of oil possible and reduces bearing pressure of old pipeline in constant flow quantity.At present drag reduction agent mainly is copolymers of alpha monoolefins. The polymerization process adopted by foreign companies comprises solvent polymerization and bulk polymerization. Polymers produced by bulk polymerization have merits including polymers'pureness, simple aftertreatment, improvement of molecule weight.The purpose of this paper is to introduce bulk polymerization adopted by polymerizing alpha olefins. The relationship between efficiency of drag reduction and factors was given by quadrature experiment of alpha olefin polymerization whose catalyst system was C-E. The cocatalyst dieathyl aluminium chloride was best by analyse activity of cocatalysts. Three new cocatalysts was confected in virtue of different cocatalyst activity, and experiments indicated polymer's efficiency of drag reduction whose cocatalyst is composed of high activity and low activity cocatalyst was more great than whose cocatalyst is one simple matter.Drag reducing agent through molecular associations have high shear stability in turbulent flow was studied and found its shear stability in turbulent flow has been improved greatly. The process of emulsion polymerization is simple and demands of its producing codition is low.The microstructure of alpha olefins polymers newly polymerized was characterized by ~1H-NMR. The molecular weight was determined by GPC and discussed the relationship between polymers' efficiency of drag reduction and molecular weight as well as molecular weight distribution.
Keywords/Search Tags:drag reducing agent, bulk polymerization, alpha olefin polymerization, molecular association
PDF Full Text Request
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