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Synthesis of PAO Using Ionic Liquids as Catalyst

Author: YangNing
Tutor: YanShengGang
School: Dalian Maritime University
Course: Materials Science and Engineering
Keywords: Ionic liquids Polymerization Catalytic Lubricating oil
CLC: O643.32
Type: Master's thesis
Year: 2010
Downloads: 86
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Abstract


With the gradual increase of people 's awareness of environmental protection , the ionic liquid as a novel green solvent and catalyst are increasingly widely favored by the domestic and foreign researchers . N, N- dimethyl- imidazo / AlCl3 Catalyst PAO (polymer alpha-olefin oil) synthesis , the catalyst has many excellent properties : high catalytic activity, reusable and easy separation . During the experiment, investigated the preparation of the catalyst temperature, the time of preparation , the amount of solvent, reaction temperature, reaction time , of AlCl3 / imidazole molar ratio , the amount of catalyst such as the impact of process conditions on the nature of the lubricating oil base oil , using the level 's viscometer lubricants viscosity. The results show that : the catalyst preparation process , the preparation temperature of the highest activity of the catalyst is 40 ℃ ; catalyst preparation time greater than 1h , 100 ° C kinematic viscosity of the PAO yield and product decreased ; while little change in viscosity index . Polymerization reaction yield increased with increasing reaction temperature, the amount of catalyst ; / imidazole molar ratio of AlCl3 to 2:00 , PAO maximum yield , while the 100 ° C kinematic viscosity and viscosity index with the smaller changes in the reaction conditions changed ; catalyst the stability test showed that the catalyst of 1 - decene polymerization preparation of lubricating base oils have a better life . The best conditions for catalyst preparation : Preparation of a temperature of 40 ° C , preparation time is 1h , 10 mL of solvent volume . The optimal reaction conditions : reaction temperature of 80 ° C , the reaction time of 4 h the AlCl3 / imidazole molar ratio of 2 , catalyst dosage 7.5 wt % . And gel permeation chromatography (GPC) on the experimental results were characterized using nuclear magnetic resonance (1H NMR, 13C NMR) . NMR : The results show that the obtained lubricating base oil component is oriented in a long chain alkane hydrocarbons , after hydrogenation in the molecule all of saturated hydrocarbons in the presence of 1 - decene oligomers exist three types of bonded isobutyl constitutive form. Gel permeation chromatography : The results show that the molecular weight distribution close to the normal distribution, distribution moderate polydispersity index smaller .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalytic reaction
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