实验原油为胜利某油田高胶质(47.99%)高沥青质(9.13%)、凝点18℃的脱水脱气特稠油,3.4s-1下30℃粘度3.6×105mPa·s,50℃粘度1.6×104mPa·s,给出了粘温曲线。稠油乳化降粘实验条件如下:油水体积比7∶3,温度50℃,水相...实验原油为胜利某油田高胶质(47.99%)高沥青质(9.13%)、凝点18℃的脱水脱气特稠油,3.4s-1下30℃粘度3.6×105mPa·s,50℃粘度1.6×104mPa·s,给出了粘温曲线。稠油乳化降粘实验条件如下:油水体积比7∶3,温度50℃,水相中烷基酚聚氧乙烯聚氧丙烯醇醚浓度5g/L。实验结果表明:作为稠油乳化降粘剂,该嵌段聚醚在烷基链长为C8～C18时均可使用,C8～C12时效果较好,C9的效果最好,形成的稠油乳状液粘度280mPa·s,稳定时间240min;壬基酚聚氧乙烯聚氧丙烯醇醚(EP EO PO)中EO加成数占EO+PO加成数的50%～95%时,乳状液粘度小于400mPa·s;用Davies法计算的HLB值在13～17时,使用4g/LEP EO PO形成的乳状液粘度小于300mPa·s;在水相中有2.0×104mg/LCa2++Mg2+存在时该乳化降粘剂可耐浓度≤2.0×105mg/L的NaCl;在有8.0×104NaCl和2.0×104mg/LCa2++Mg2+存在下,温度从35℃升高到80℃时,乳状液粘度和稳定时间均下降,90℃时乳状液发生反相,EP EO PO的使用温度为35～80℃。图4表3参4。展开更多
The intercalate and exfoliate actions of BHET or PEG for montmorillonite are discussed.BHET(ethylene glycol terephthalate) can be absorbed and intercalated between layers of montmorillonite, not only at high temperatu...The intercalate and exfoliate actions of BHET or PEG for montmorillonite are discussed.BHET(ethylene glycol terephthalate) can be absorbed and intercalated between layers of montmorillonite, not only at high temperature, but also normal temperture.Especially at temperatures,30～40℃ over the melt temperature,more BHET are absorbed by montmorillonite.When the content of montmorillonite is less than 10% in its mixture with BHET the stack layers of montmorillonite can be exfoliated into single layers.But when the content of montmorillonite is more than 10% a few exfoliated layers combined into more layers.Montmorillonites can also absorb PEG,but in this case only the layer distances are increased,no layer exfoliation is observed.Between the layers one to three layers of PEG molecules can be absorbed.So that,there are respectively three peaks d =4 4,3 4 and 1 8nm in WAXD curves.When the content of montmorillonite is more than 10% there is only one layer distance d =1 8nm.展开更多
文摘实验原油为胜利某油田高胶质(47.99%)高沥青质(9.13%)、凝点18℃的脱水脱气特稠油,3.4s-1下30℃粘度3.6×105mPa·s,50℃粘度1.6×104mPa·s,给出了粘温曲线。稠油乳化降粘实验条件如下:油水体积比7∶3,温度50℃,水相中烷基酚聚氧乙烯聚氧丙烯醇醚浓度5g/L。实验结果表明:作为稠油乳化降粘剂,该嵌段聚醚在烷基链长为C8～C18时均可使用,C8～C12时效果较好,C9的效果最好,形成的稠油乳状液粘度280mPa·s,稳定时间240min;壬基酚聚氧乙烯聚氧丙烯醇醚(EP EO PO)中EO加成数占EO+PO加成数的50%～95%时,乳状液粘度小于400mPa·s;用Davies法计算的HLB值在13～17时,使用4g/LEP EO PO形成的乳状液粘度小于300mPa·s;在水相中有2.0×104mg/LCa2++Mg2+存在时该乳化降粘剂可耐浓度≤2.0×105mg/L的NaCl;在有8.0×104NaCl和2.0×104mg/LCa2++Mg2+存在下,温度从35℃升高到80℃时,乳状液粘度和稳定时间均下降,90℃时乳状液发生反相,EP EO PO的使用温度为35～80℃。图4表3参4。
文摘The intercalate and exfoliate actions of BHET or PEG for montmorillonite are discussed.BHET(ethylene glycol terephthalate) can be absorbed and intercalated between layers of montmorillonite, not only at high temperature, but also normal temperture.Especially at temperatures,30～40℃ over the melt temperature,more BHET are absorbed by montmorillonite.When the content of montmorillonite is less than 10% in its mixture with BHET the stack layers of montmorillonite can be exfoliated into single layers.But when the content of montmorillonite is more than 10% a few exfoliated layers combined into more layers.Montmorillonites can also absorb PEG,but in this case only the layer distances are increased,no layer exfoliation is observed.Between the layers one to three layers of PEG molecules can be absorbed.So that,there are respectively three peaks d =4 4,3 4 and 1 8nm in WAXD curves.When the content of montmorillonite is more than 10% there is only one layer distance d =1 8nm.
