摘要
将 3种嵌段聚醚型破乳剂的混合物用丙烯酸和马来酸酐酯化 ,酯化产物在引发剂作用下聚合 ,制成了高分子量的水溶性原油破乳剂 ,考察了所得改性破乳剂对大庆原油水乳状液的破乳脱水性能。 3种破乳剂单体的选择基于性能互补和相容性原理 ,确定的最佳合成配方如下 :3种破乳剂单体的摩尔比 1∶1.2∶1;丙烯酸、马来酸酐摩尔比2∶1,酸 (以羧基计 )、破乳剂单体 (以羟基计 )摩尔比 1.3∶1;引发剂BPO用量为混合酸质量的 10 %。按此法合成的破乳剂 (商品名GD990 9)在加量为 2 0 0mg/kg的条件下 ,对大庆原油、胜利孤岛原油、安哥拉卡宾达原油水乳状液的破乳脱水效果均显著优于对比破乳剂 (共 7种 ) ,5 0℃下 90min的脱水率高达 95 %～ 10 0 % ,特别是对于辽河稠油水乳状液的破乳脱水 ,所有对比破乳剂均无效或低效 ,使用GD990 9时 6 0℃、90min脱水率仍高达 95 %。
A high molar mass water soluble demulsifier for crude oils is prepared in laboratory through esterificating 3 block copolyether demulsifiers by acrylic acid and maleic anhydride in mixture and initially copolymerizing the mixed esters. The demulsifying/dehydrating capacity of the modified demulsifier for 50/50 Daqing crude oil/water emulsion is investigated. The 3 block copolyethers are chosen on the basis of concepts of behavior compensation and compatibility and the optimal composition of reagents is obtained as follows: 3 block copolyethers in molar ratio 1∶1.2∶1, acrylic acid and maleic anhydride in molar ratio 2∶1, acid+anhydride(carboxyl) and block copolyethers (hydroxyl) in molar ratio 1.3∶1, and dosage of initiator BPO 10% of mass of acid+anhydride. The demulsifying/dehydrating rates of the commercial demulsifier(trade mark GD9909) synthesized by this method for 50/50 aqueous emulsions of Daqing, Gudao (in Shengli) and Cabinda (in Angola) crude oils are notably higher than that of 7 control demulsifiers and account 95-100% at 50℃ in 90 min; for demulsifying/dehydrating 50/50 aqueous emulsion of Liaohe heavy crude oil the control chemicals are all ineffective and GD9909 appears to be the only good demulsifier with dehydrating rate as high as 95% at 60℃ in 90 min.
出处
《油田化学》
CAS
CSCD
北大核心
2002年第3期237-240,共4页
Oilfield Chemistry
关键词
丙烯酸
改性
破乳剂
合成
性能
含水原油
水溶性
高相对分子质量
改性嵌段聚醚
不饱和酸酯化
聚合
合成
demulsifier
water cut crude oils
water solubility
high molar mass
modified block copolyether
esterification by unsaturated acids/copolymerization
synthesis
demulsification/dehydration
