摘要
在甲苯中以BPO引发，使马来酸酐MAH接枝于EVA上，生成接枝产物EVA．g-MAH，再分别与十八醇、N-（2-羟乙基）乙二胺、十二胺反应，生成接枝改性物EVA—g-MHA—O、EVA—g-MAH--N、EVA-g-MAH-D，用甲醇沉淀、干燥，得到油溶性稠油降黏刺。所用EVA含VA链节4．5％，VA链节、MAH、改性剂摩尔比为1：2：2。将降黏剂的煤油溶液0．4mL加入20g稠油中，在60℃测量黏度，以加等量煤油的稠油黏度为基准计算降黏率。对于分别舍沥青质19．20％和23．74％，含胶质2．34％和2．83％，舍蜡5．51％和4．31％、60℃黏度1．895和3、367Pa·s的1号和2号孤东稠油，3种接枝改性EVA在加量大于100mg／kg时的降黏率比EVA高～25％和～30％；对于1号稠油，加量200-600mg／kg时降黏率维持不变或略有上升，对于2号稠油，加量大于300或400mg／kg后降黏率下降，其中EVA和EVA—g-MAH-D下降明显。3种接枝改性EVA对1号稠油的降黏率，0剂〉N剂〉D剂，对于2号稠油则N剂≈O剂〉D剂。讨论了降黏机理。图2表1参4。
In toluene, maleic anhydride is grafted onto EVA of 4.5 % VA content at the presence of initiator BPO and the graft product is reacted with octadecyl alcohol, N-（2-hydroxyethyl） ethylene diarnine, and dodecyl amine, respectively to form 3 modified grafted EVAs （MG-EVAs）, which are precipitated by methanol and give oil soluble viscosity reducers for heavy crude oil （HCO） VEA-g-MAH-O,VEA-g-MAH-N,and VEA-g-MAH-D. The VA units, MAH, and MAH are taken in molar ratio 1：2：2. These MG-EVAs in kerosene solution are introduced into HCO samples in ratio 0.4 mL/20 g HCO of Gudong, Shengli, the viscosity of the treated HCO is determined at 60℃ and the viscosity reducing rate （VRR） is calculated on the basis of the viscosity of HCO with equal volume of kerosene added. For HCO samples Nol and No2, containing 19.20 % and 23.74 % asphaltene, 2.34 % and 2.83 % resin, and 5.51% and 4.31% wax and having viscosity at 60℃ of 1. 895 and 2. 367 Pa＇s, respectively, the VRR of these 3 MG-EVSs at dosage 〉100 mg/kg is higher than that of EVA by -25% and -30%, respectively, keeps stable or slightly increases for HCO Nol at dosage 200--600 mg/kg and goes through a maximum at dosage 300 or 400 mg/kg notably for, in particular, VEA-g-MAH-D and EVA. These 3 MG-EVAs are arranged according toVRR for HCO Nol in order. VEA-g-MAH-O〉-N〉-D and for HCO No2 in order.. VEA-g-MAH-N≈O〉-D. The viscosity reducing mechanisms are discussed.
出处
《油田化学》
CAS
CSCD
北大核心
2007年第3期266-268,276,共4页
Oilfield Chemistry
关键词
稠油
降黏剂
油溶性
接枝改性乙烯/乙酸乙烯酯共聚物(EVA)
降黏
降黏机理
适应性
heavy crudeoil
viscosity reducers
oil soluble
modified grafted ethylene/vinytacetate copolymers
viscosity reduction
viscosity reducing mechanisns
conformity
