蜡油降凝剂PMST的合成及其降凝效果  

Synthesis of Wax Oil Pour Point Depressant PMST and Its Pour Point Depressing Effect

作　　者：龙小柱[1] 王闯[1] 王肖肖[1] 唐磊[1] 张爽[1] 

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《精细化工》2013年第7期784-788,797,共6页Fine Chemicals

摘　　要：以马来酸酐、混合醇和苯乙烯为原料合成了马来酸混合酯-苯乙烯共聚物(PMST)蜡油降凝剂,适宜的酯化条件为:n(混合醇)∶n(马来酸酐)=2∶1,催化剂质量分数1.5%,溶剂质量分数20%,酯化时间3 h;聚合条件:n(苯乙烯)∶n(马来酸混合酯)=1∶1,溶剂质量分数50%,引发剂质量分数1.5%,聚合温度80℃,聚合时间3 h。用红外及核磁分析确证了产物结构。PMST的添加量为0.4%(以蜡油质量计),热处理温度为70℃时,可使实验用蜡油凝点降低26℃,实现高凝点蜡油在常温乃至低温具有较好的流动性。The copolymer maleic anhydride mixed alcohols ester-styrene（PMST） was synthetized from the raw materials of maleic anhydride,mixed alcohols and styrene.The reaction conditions were investigated and the pour point depressing effect was tested.The suitable esterification conditions are：molar ratio of mixed alcohols to maleic anhydride is 2：1,esterification time is 3 h,amount of catalyst is 1.5%,amount of esterification solvent is 20%;and the suitable polymerization conditions are：molar ratio of styrene to maleic anhydride mixed alcohols is 1：1,amount of polymerization solvent is 50%,polymerization temperature is 80 ℃,amount of initiator is 1.5%,polymerization time is 3 h.IR and 1HNMR spectra were used to confirm the structure of the products.When the addition dose of PMST is 0.4%（based on the mass of wax oil）,and the heat treatment temperature is 70 ℃,PMST can make the pour point of wax oil used for experiment decrease by 26 ℃,which empowers the high freezing point wax oil to have an ideal fluidity at room temperature or even at lower temperature.

关 键 词：蜡油 降凝剂 聚合物 凝点 油田化学品与油品添加剂 

分 类 号：TE869[石油与天然气工程—油气储运工程]