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Synthesis and Characterization of Base Oil of Lubricant by Polymerizing Alpha-Olefins Catalyzed by Metallocene Catalyst System

Author: ZhaoJunFeng
Tutor: LvChunSheng
School: Daqing Petroleum Institute
Course: Chemical Engineering
Keywords: Poly- alpha - olefin Gathered Lube base oil Constrained geometry Metallocene catalyst
CLC: TE626.3
Type: Master's thesis
Year: 2009
Downloads: 174
Quote: 1
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Abstract


By alpha - olefins can be obtained by the catalytic oligomerization of poly- alpha - olefin ( polyalphaolefin , PAO ) is a low pour point , high viscosity index , chemical and thermal stability of good quality lubricating oil base oil , a Ziegler - Natta catalyst , and Mao the metal catalyst is a highly efficient catalyst for the polymerization of olefins . This thesis as a starting point, for the purpose of excellent performance synthetic lubricant base oil , respectively MgCl 2 < / sub > load Ziegler-Natta catalyst system containing cyclopentadienyl -phenoxy constrained geometry configuration metallocene catalyst system [ the - Me 4 < / sub > Cp -4 ,6 - tBu2 - PhOTiCl 2 / Al ( iBu ) 3/Ph3C B ??( C 6 F 5 ) 4 -] 1 - decene oligomerization system. The the MgCl 2 < / sub > load Ziegler-Natta catalyst system for 1 - decene oligomerization studies have shown that the characteristics of the catalyst system in line with the basic law of the conventional olefin polymerization Ziegler-Natta catalyst , temperature, and Al-Ti the molar ratio of polymerization conditions have an important impact on the oligomerization activity and product molecular weight . Limit the geometrical configuration of a metallocene catalyst with an aluminum alkyl and borides consisting of cyclopentadienyl - phenoxy - containing catalytic system [2-Me 4 Cp-4 ,6-tBu2 -PhOTiCl 2 / Al (iBu) 3/Ph3C B (C 6 F 5 ) 4 -] 1 - decene Qi polymerization , examined in detail the reagent was added to the sequence , reaction temperature , Al / Ti molar ratio of B / Ti molar ratio , reaction time and catalyst concentration impact on the activity and the molecular weight of the oligomerization reaction . Analysis of the mechanism of the the metallocene cation active site formation mechanism , generates a conversion between different cationic species and 1 - decene polymerization . 1 < / sup > H NMR and 13 < / sup > C NMR polymer composition and structure were analyzed and characterized by gas chromatography , infrared spectroscopy , . The pour point , molecular weight and viscosity of the product were determined in accordance with the national standard test methods of petroleum and petroleum products . The study showed that , the cyclopentadienyl containing - phenoxy constrained geometry metallocene catalytic system 1 - decene oligomer to obtain the excellent performance of the lubricating base oil , kinematic viscosity at 40 ° C. The 1750.74mm2 / s , 100 ° C kinematic viscosity of 192.11mm2 / s, a viscosity index of 238 , a pour point as -62 ° C , with an average molecular weight of 620 .

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > Petroleum products > Lubricating oil
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