原油降粘剂组分的红外光谱及核磁共振氢谱的分析研究

为了明确原油降粘剂的主要组分,采取蒸馏、溶解一沉淀法及柱色谱法对原油降粘剂进行分离与纯化,用红外光谱法对其主要组分官能团的结构进行了鉴定,推断其主要组分是丙烯酸乙酯/甲基丙烯酸甲酯/丙烯酸三元共聚物,用核磁共振氢谱及质谱进行了结构确认及定量分析,共聚物中3种单体:丙烯酸乙酯、甲基丙烯酸甲酯、丙烯酸的摩尔数比为37.1:25.8:37.1;重量百分比为41.1:28.8:29.8.用红外光谱对甲醇溶液部分进行了结构分析,结果表明,非离子表面活性剂为聚氧乙烯醚,分子量范围是800～1 600,阴离子表面活性剂为烷基苯磺酸钠,其余为助剂和水.

Analysis and Identification of Emulsifying Viscosity Reducer by FTIR and 1H NMR

Separation and purification of viscosity reducer for crude oil were performed with distillation and dissolution-precipitation. The functional group of its main component was identified by FTIR It was deduced that the main component of the crude oil viscosity reducer is the tricopolymer of poly ethyl acrylate/methyl methacrylate/acrylic acid. The structure of the component was also ascertained and quantitively analysed with 1 H NMR and MS. The mol ratio of the three monomers is 37. 1 : 25. 8 : 37. 1, and the mass ratio is 41. 1 : 28. 8 : 29. 8. The structure of the part soluble in methanol was identified by FTIR. The result showed that the nonionic sufactant is poly ethylene oxide with the moleculear mass range of 800-1600, and the anionic surfactant is alkylbenzene sulfonate. The residue is accessory ingredient and water.