助溶剂-表面活性剂在甲醇汽油中的应用  

APPLICATION OF SURFACTANTS COMPOUND COSOLVENT IN METHANOL-GASOLINE BLENDS

作　　者：李进[1] 曹阳[1] 詹德鼎[2] 赖小琼[1] 

机构地区：[1]海南大学材料与化工学院,海南海口570288 [2]中国石油大港油田天然气公司,天津300280

出　　处：《精细石油化工》2015年第6期14-18,共5页Speciality Petrochemicals

基　　金：海南省国际合作重点项目(GJXM20100001);海口市重点项目(0201003051);海南大学青年基金项目(qnjj1240)

摘　　要：以表面活性剂、高碳醇及甲酯类物质复配作为助溶剂,以甲醇-直馏汽油、芳烃-甲醇-直馏汽油为原料醇汽油,通过考察不同亲水亲油值(HLB值)助溶剂使体系不分层的加入量得到最佳助溶效果情况下的HLB值,以及适宜HLB值下助溶剂对甲醇汽油相分离温度的影响,得到了一种清洁高效的甲醇汽油助溶剂复配方案。绘制了该复配方案抗水相稳定性实验的三元相图,探讨了其相稳定作用与溶解度参数的关系。结果表明:通过HLB值可以大致评价甲醇汽油的助溶效果,但其仅适用于同一复配体系;复配表面活性剂的HLB为2时,甲醇与汽油具有最佳的互溶性;随着脂肪酸甲酯加入量的增多,相分离温度下降,说明脂肪酸甲酯在一定程度上可以增强甲醇与汽油的互溶性;最佳复配方案为添加剂总量为2%,E(脂肪酸甲酯)、C(SAA-I+油酸)、D(正辛醇+正十二醇)分别占添加剂总量6.3%,8.5%,85.2%时,M30甲醇汽油相分离温度达-19℃;溶解度参数对甲醇与汽油互溶性效果无必然关系,但具有一定的参考价值。A clean and efficient cosolvent of the best compositional formulation of MGB can be obtained with surfactant, high alcohols and fatty acid methyl ester （FAME） compound as cosolvent, methanolstraight-run gasoline blends and methanol-arene gasoline blends as materials. The HLB can be obtained by comfirming the best compositional formulation, then through investigating the phase separate temperature under different content of methanol with the cosolvent under the best HLB. Methanol-gasoline-water triphase diagram was drawn and relationship of phase stability and solubility parameter was discussed. The results show that the HLB depicts the hydrotropy of methanol and gaso- line, and it is only suitable for the same compositional formulation. The methanol and gasoline has the best hydrotropy when the HLB value is 2. The phase separate temperature decreases as the increases of the content of FAME, which shows that the hydrotropy can be enhanced more or less with the addition of FAME. The phase separate temperature of M30 could reach -19 ℃ when the best compositional formulation was got as that the cosovent account was 2% of MGB and the FAME, C（SAA-I＋ Oleic acid）, D（n-caprylic alcohol＋n-dodecyl alcohol ） account for 6.3%, 8.5%, 85.2G respectively of the cosolvent. Although the solubility parameter is not entirely suitable for the screening of the additive in methanol-gasoline blends, it has a certain value for reference.

关 键 词：甲醇汽油 助溶剂 助溶效果 亲水亲油平衡值 

分 类 号：TE624.81[石油与天然气工程—油气加工工程]