不同聚合方法合成聚α-烯烃减阻剂的比较  

A Comparison of Bulk and Solution Polymerized Poly-α-Olefines as Oil-Soluble Drag Reducer

作　　者：胡玉华[1] 周岐雄[1] 刘晓玲[1] 卞海斌[1] 宋高杰[1] 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《油田化学》2008年第1期86-89,共4页Oilfield Chemistry

摘　　要：以容积1L的常压反应釜为第一反应器，TiCl3／MgCl2＋AI（i-Bu）3为催化刺，DDS为调整剂，采用两段反应方法，考察了C12体积分数〉0．94的商品C10～C14长链α-烯烃的本体和溶液聚合（溶剂正庚烷与单体体积比3：2）及聚合产物20℃时在柴油中的紊流减阻率。与本体聚合体系相比，溶液聚合体系在起始反应温度为-2℃和-4℃时，搅拌电流（黏度）增加和温度升高均较快，而在5℃和10℃时则较慢，溶液聚合反应受起始温度影响较小，操作弹性较大。与本体聚合产物相比，溶液聚合产物的减阻率在起始反应温度≤2℃时较低，而在≥0℃时较高，在工作管线长17m的模拟环道评价装置上，使减阻率降至接近零的剪切次数较多（8次对4次），耐剪切性较好。减阻率分别为62％和52％的中试溶液法和本体法聚α-烯烃的GPC曲线显示，前者平均相对分子质量较高，分布较窄：Mn分别为3．48×10^6和2．10×10^6，Mw分别为8．00×10^6和5．07×10^6，Mw／Mn分别为2．29和2．41。图9参11。The polymerization in bulk and in n-heptane solution （with solvent to monomer volume ratio 3：2） of commercial C10--C14 α-defines containing 〉94% （v/v） C12 is investigated by using a two-stage reaction method in an atmospheric reactor I with TiCI3/ MgCl2 ＋ Al（ i-Bu）3 as catalyst and DDS as regulator and the polymerization products are tested in diesel oil at 20℃ for turbulent drag reduction （DR）. The stirring electric current, that is the viscosity, and the temperature of solution polymerization mixtures raise faster at starting reaction temperature （SRT） being of - 2℃ and - 4℃ and slower at SRT= 5℃ （and 10℃ ） than that of bulk polymerization mixtures; the solution polymerization is less affected by SRT and hence is more operative. The percentage DR of solution polymerization products is lower at SRT≤2℃ and higher at SRT≥0℃ than that of bulk polymerization products and is decreased nearly to zero after shearing 8 times in a simulation loop apparatus for evaluating drag reducers with 17 meters long working pipelines by contrast to 4 times for bulk polymerization products. The structural characteristics Mn, Mw, and Mw/Mn determined by GPC method are as follows： 3.48 × 10^6, 8.00 × 10^6, and 2.29 for a poly-α-olefine sample produced by solution polymerization in a pilot installation and 2.10 × 10^6, 5.07 × 10^6, and 2.41 for a pilot bulk poly-α-olefine sample; the solution polymer has higher relative molecular mass and more narrow distribution than that of bulk one. The percentage DR of the two samples is of 62% and 52%, respectively.

关 键 词：聚Α-烯烃 油溶性 减阻剂 长链Α-烯烃 聚合方式 聚合温度 紊流减阻 分子结构参数 

分 类 号：TE869[石油与天然气工程—油气储运工程] TQ316.33[化学工程—高聚物工业]