A new double betaine 1,1′-（propane-1,3-diyl）dipyridinium-4-carboxylate L has been synthesized. Reaction of 1, 1′-（propane-1,3-diyl）dipyridinium-4-carboxylate tetrahydrate 1 with Co（ClO4）2-6H2O leads to the for...A new double betaine 1,1′-（propane-1,3-diyl）dipyridinium-4-carboxylate L has been synthesized. Reaction of 1, 1′-（propane-1,3-diyl）dipyridinium-4-carboxylate tetrahydrate 1 with Co（ClO4）2-6H2O leads to the formation of a new Co（Ⅱ） coordination compound, namely [Co（H2O）6]-2H2O-2L-2ClO4 2. The crystal structures of 1 and 2 have been determined by single-crystal X-ray diffraction method. Crystal data for 1. monoclinic, space group C2/c, a = 18.945（4）, b = 7.700（2）, c = l 1.888（2）A,β = 101.67（3）°, V = 1698.3（6） A^3, Z = 4, F（000） = 760.0, Dc = 1.402 g/cm^3, the final R = 0.0607 and wR = 0.1607 for 950 observed reflections （1 〉 2σ（I））; and those for 2： monoclinic, space group P21/c, a = 17.982（1）, b = 15.879 （1）, c = 7.0716（5）/A,β= 100.675（1）°, V= 1984.3（3） ,A^3 Z= 4, F（000） = 1010.0, Dc = 1.631 g/cm^3, the final R = 0.0316 and wR = 0.0896 for 3784 observed reflections （1 〉20（I））. Crystal structure analysis indicates that in 1, molecules of L in a ＂V-shaped＂ conformation are linked to chains sustained by O-H…O hydrogen bonds between carboxylate groups and solvent water molecules. The chains are joined by O-H…O and C-H…O hydrogen bonds to further expand into a three-dimensional structure. For 2, molecules of L in a ＂Z-shaped＂ conformation are linked by hydrogen bonds between carboxylate groups and aqua ligands to form a chain of loops running down the b axis. The （2D→2D） polythreading in compound 2 represents the mode of parallel interpenetration of 2D sheets, having polyrotaxane character.展开更多
为研制新型清洁压裂液,采用脂肪酸甲酯磺酸钠与芥酸酰胺丙基甜菜碱复配得到了一种增稠剂MC-1,研究了MC-1及无机盐加量对压裂液黏度的影响,考察了压裂液(3%MC-1+5%KCl)的耐温性、耐剪切性、悬砂性和破胶性能。结果表明,MC-1与多种无机盐...为研制新型清洁压裂液,采用脂肪酸甲酯磺酸钠与芥酸酰胺丙基甜菜碱复配得到了一种增稠剂MC-1,研究了MC-1及无机盐加量对压裂液黏度的影响,考察了压裂液(3%MC-1+5%KCl)的耐温性、耐剪切性、悬砂性和破胶性能。结果表明,MC-1与多种无机盐KCl、NH4Cl和Na Cl均有较好的协同性,其中与KCl的协同性最好,压裂液黏度随MC-1和KCl加量增大而增加;该压裂液具有较好的耐温耐剪切性和悬砂性,在80℃、砂比40%的条件下,砂子的沉降速度为1.18 mm/s;与煤油混合后在80℃下2 h内完全破胶,破胶液黏度为4.5 m Pa·s,表面张力为24 m N/m,界面张力为0.8764 m N/m。该压裂液可适用于小于90℃的地层使用。展开更多
针对砂岩储层非均质性强、水平井水平段长、海上酸化作业受平台空间限制等特点,常规酸化技术处理效果有限。文中研制出一种新型含羧酸基甜菜碱表面活性剂,该表活剂依靠氢离子浓度变化控制酸液黏度,基于该表活剂优化设计一套适用于砂岩...针对砂岩储层非均质性强、水平井水平段长、海上酸化作业受平台空间限制等特点,常规酸化技术处理效果有限。文中研制出一种新型含羧酸基甜菜碱表面活性剂,该表活剂依靠氢离子浓度变化控制酸液黏度,基于该表活剂优化设计一套适用于砂岩储层的转向酸液体系。酸液体系黏度随酸液浓度降低呈先上升后下降的趋势,当酸液浓度为7%时,黏度可达658 m Pa·s,能有效封堵高渗透层。同时该转向酸还具有良好的缓蚀性、铁离子稳定性和破乳性,表面张力低,高温流变性好等特点,现场应用效果表明,该酸液转向效果明显,酸化增产效果显著。展开更多
基金This work was financially supported by Liuhui Center for Applied Mathematics, Nankai University and Tianjin University (No. H10114)
文摘A new double betaine 1,1′-（propane-1,3-diyl）dipyridinium-4-carboxylate L has been synthesized. Reaction of 1, 1′-（propane-1,3-diyl）dipyridinium-4-carboxylate tetrahydrate 1 with Co（ClO4）2-6H2O leads to the formation of a new Co（Ⅱ） coordination compound, namely [Co（H2O）6]-2H2O-2L-2ClO4 2. The crystal structures of 1 and 2 have been determined by single-crystal X-ray diffraction method. Crystal data for 1. monoclinic, space group C2/c, a = 18.945（4）, b = 7.700（2）, c = l 1.888（2）A,β = 101.67（3）°, V = 1698.3（6） A^3, Z = 4, F（000） = 760.0, Dc = 1.402 g/cm^3, the final R = 0.0607 and wR = 0.1607 for 950 observed reflections （1 〉 2σ（I））; and those for 2： monoclinic, space group P21/c, a = 17.982（1）, b = 15.879 （1）, c = 7.0716（5）/A,β= 100.675（1）°, V= 1984.3（3） ,A^3 Z= 4, F（000） = 1010.0, Dc = 1.631 g/cm^3, the final R = 0.0316 and wR = 0.0896 for 3784 observed reflections （1 〉20（I））. Crystal structure analysis indicates that in 1, molecules of L in a ＂V-shaped＂ conformation are linked to chains sustained by O-H…O hydrogen bonds between carboxylate groups and solvent water molecules. The chains are joined by O-H…O and C-H…O hydrogen bonds to further expand into a three-dimensional structure. For 2, molecules of L in a ＂Z-shaped＂ conformation are linked by hydrogen bonds between carboxylate groups and aqua ligands to form a chain of loops running down the b axis. The （2D→2D） polythreading in compound 2 represents the mode of parallel interpenetration of 2D sheets, having polyrotaxane character.
文摘为研制新型清洁压裂液,采用脂肪酸甲酯磺酸钠与芥酸酰胺丙基甜菜碱复配得到了一种增稠剂MC-1,研究了MC-1及无机盐加量对压裂液黏度的影响,考察了压裂液(3%MC-1+5%KCl)的耐温性、耐剪切性、悬砂性和破胶性能。结果表明,MC-1与多种无机盐KCl、NH4Cl和Na Cl均有较好的协同性,其中与KCl的协同性最好,压裂液黏度随MC-1和KCl加量增大而增加;该压裂液具有较好的耐温耐剪切性和悬砂性,在80℃、砂比40%的条件下,砂子的沉降速度为1.18 mm/s;与煤油混合后在80℃下2 h内完全破胶,破胶液黏度为4.5 m Pa·s,表面张力为24 m N/m,界面张力为0.8764 m N/m。该压裂液可适用于小于90℃的地层使用。
文摘针对砂岩储层非均质性强、水平井水平段长、海上酸化作业受平台空间限制等特点,常规酸化技术处理效果有限。文中研制出一种新型含羧酸基甜菜碱表面活性剂,该表活剂依靠氢离子浓度变化控制酸液黏度,基于该表活剂优化设计一套适用于砂岩储层的转向酸液体系。酸液体系黏度随酸液浓度降低呈先上升后下降的趋势,当酸液浓度为7%时,黏度可达658 m Pa·s,能有效封堵高渗透层。同时该转向酸还具有良好的缓蚀性、铁离子稳定性和破乳性,表面张力低,高温流变性好等特点,现场应用效果表明,该酸液转向效果明显,酸化增产效果显著。
