Typical Polyether Terminated Study

The typical polyether in this paper refers initiation molecular chain terminal has the active group to gather the oxygen alkene base copolymer caused by reactive hydrogen.This kind of polyether without sealed end which has the hydroxyl, as a result of existence of the active hydroxyl, its acidproof alkalinity, the salt endurance and the heat resistance was limited.Moreover, if the initiator includes unsaturated linkage polyether and other active group reaction, the existence of hydroxyl can influence the response between unsaturated linkage and system.The closure-linked polyether as the end of hydroxy be replaced, has a high chemical stability, but such letters have also polyether-cloud point decline in the ability to reduce foam, to enhance the capacity of oil, critical micelle concentration dropped and chemical More stable nature of the characteristics apply to different pH value, high-temperature prolonged use, which widened the scope of the use of polyether.Polyether-way closure can be divided into ether-capped, esterification and cross-linked closed-end closure, polyether is on the hydroxyl molecules through a variety of small organic compounds ether, esterification or cross-linking reaction, Hydroxy hydrogen was lively on the various short-chain alkyl, Fong alkyl, ester-based or other groups to replace.Terminated, has changed its physical and chemical properties, an increase of some new features. In this paper, the closure of the typical polyether-synthesis technology and the performance of typical capped polyether are researched, and the terminal polyether is applied in research of crude oil down the friction.As"the energy crisis"the time coming, the petroleum takes the industry blood vessels, petroleum mining and the transportation attracts people's widely day by day, particularly viscous crude oil mining appears high especially important, but how to the problem of viscous crude oil the mining and transportation is the biggest difficult problem in the petroleum profession world. At present,domestic and foreign generally add high polymer surface active agent or the viscosity reducer to reduce the flowing resistance in the mining and the transportation process of crude oil,in order to enhancing the transportation efficiency.In view of some questions that the rude oil reduction agent and the thinner exists in thick oil mining and the transportation, and caused the crude oil resistance primary cause in the crude oil flowing process, this article mainly conducts the research to a kind of sealed end polyether synthesis and the performance, the experiment has discovered one kind of the bicycloimidazoline derivative sealed end polyether. The research discovered that this kind of sealed end polyether duplicate matches with one kind of active high polymer as the crude oil frictional resistance reducer, can reduce the crude oil flow resistance effectively, and this kind compound frictional resistance reducer expand the applicable scope of crude oil that contain water ,from contain water 10% above the crude oil expanded to contains water 5% above the crude oil also fall the frictional resistance effectively.We mainly studied from the interfacial and surface chemistry angle to explain the mechanism of frictional resistance.In library using had the oxygen nitrogen structure alkene base imidazoline derivatives terminated linear polyurethane,synthesized bicyloimidazoline derivatices polyesters. Using the bicycloimidazoline derivative sealed end polyether to match the active polymer, prepared the frictional resistance reducer. Carring on the laboratory appraisal, and Discovered that the compound frictional resistance reducer compare to the bicyloimidazoline derivatives teriminated polyesters, the compound frictional resistance reducer can wide the using scope of crude oil water contenting . and it can strengthen the ability of reducing the crude oil the flow resistance. Moreover, using micro-photography method, discovered that, when adding the compound frictional resistance reducer into the different water contents oil, the flow resistance of the crude oil greatly drops, and the microscopic shape of the crude oil has the characteristic change. The experiment proved that we had discovered one kind more effective the frictional resistance reducer .The article includes five aspects as following:(1) Introduced development and the application of polyether surfactants research about the domestic and foreign.(2) Introduced the typical sealed end polyether synthesis technology(3)Using the bicycloimidazoline derivative sealed end polyether to match the active polymer, prepared the frictional resistance reducer.(4) This frictional resistance reducer has the very good effect of reducing the crude oil flowing resistance in mining and transportation process.(5) From the contact surfaces interface collides and rheology study the flowing resistance, surface tension and superficial adsorptive viscosity changes of crude oil before and after adding frictional reducer.(6) using micro-photography method, discovered that, when adding the compound frictional resistance reducer into the different water contents oil, the flow resistance of the crude oil greatly drops, and the microscopic shape of the crude oil has the characteristic change.