十六烷基二苯醚二磺酸钠生产技术研究
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摘要
经过研究,开发出了以α-十六烯烃和二苯醚为原料的烷基化新工艺。并通过核磁共振氢谱(1~H NMR)、红外光谱(IR)、液相色谱-质谱联用(LC-MS-ELSD)等方法确定了烷基化产物为单十六烷基二苯醚。通过实验研究选择出了最佳烷基化反应条件,其摩尔转化率达到60.9%。单十六烷基二苯醚经发烟硫酸磺化、中和得到十六烷基二苯醚二磺酸钠混合物,经检测活性物含量为58.44%(平均分子量按540)。通过对十六烷基二苯醚二磺酸钠进行滴定分析,平均分子量按598计算,活性物含量达到58.44%。适宜反应条件为:反应温度为90℃,以发烟硫酸为磺化剂,C16α-烯烃与二苯醚摩尔比在1.0:1.6的条件下,反应6个小时。同时研究了十六烷基二苯醚二磺酸钠与重烷基苯磺酸盐复配使用的强碱及弱碱化三元驱油体系的界面活性情况,弱碱三元驱油体系是以两种表活剂相互复配为主体方案,以寻找与重烷基苯磺酸盐可相互配伍的新型表活剂为研究方向,通过摸索最佳的复配比例、总表活剂浓度及碱的浓度等参数,使得弱碱体系的界面张力及热稳定性等各项指标满足油田的要求,最终实现三元复合驱的弱碱化。为十六烷基二苯醚二磺酸钠作为驱油用表活剂的工业化应用进行了工业化尝试。
Through research, new process was developed with 16-alpha olefins and the dephenyl ether being raw materials. Furthermore, alkylation product was identified to be sodium hexadecyl dephenyl ether disulfonate by nuclear magnetic spectrum(1H NMR), IR spectrum(IR)and liquefied chromatogram and mass spectrum (LC-MS-ELSD). Through experimental studies, the optimum parameters for the synthesis reaction were chosen. Mole yield rate reached up to 60.9%. The alkylation product was transformed to be final product (C_(16-MADS)) through sulfurization and neutralization reactions. The surface active agent content was as much as 58.44 %(molecular weight 540 on average). The optimum reaction parameters: 90℃reaction temperature, vitriol as the sulfuric agent, 1:1.6 mole ratio between 16-alpha olefins and the dephenyl ether, 6h reaction duration. The article also executed researches on the complex systems of HABS and C_(16-MADS). In detail, the complex system was designed to be weak-alkalization oriented and low concentration ASP oriented. In search of optimum complex parameters, other co surfactants were utilized to match up with HABS and C_(16-MADS). Finally after optimization, the concentration of alkali, surfactants, the ideal mole ratio between reagents and other critical parameters were identified. As a result, the performance of the complex system all conformed to the criteria of oilfield in term s of interfacial properties, heat&salt tolerance and stability. In conclusion, it helps to realize the weak-alkalization and non-alkalization of the complex system. It also promotes the industrialization of the C_(16-MADS) as surfactant for oilfield.
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