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Demulsifying super-heavy crude oil with bifunctionalized block copolymers

机译：用双官能团嵌段共聚物破乳超重质原油

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摘要

One of the main problems that petroleum industry must face is the growing difficulty to extract both water and salts present in heavy crude oils. High viscosity, and enormous contents of resins and asphalt-enes contribute to stabilize the water droplets dispersed in crude oil, making petroleum demulsification harder and the development of new dehydrating agents necessary. A series of copolymers consisting on a central block polypropylene oxide (PPO), and two side block of ethylene oxide (EO) were synthesized. These copolymers were afterwards submitted to a functionalization process, in order to graft some secondary amines to EO segments, to increase their interactions with the aqueous phase dispersed in the petroleum. The average molecular weight of the functionalized copolymers was adjusted according to the weight-average molecular weight (M_w) of the sample of super-heavy crude oil. The water removals from the petroleum sample were evaluated by bottle testing, mainly varying the kind of functional group and copolymer content. It was observed that these novel demulsifying agents have a better performance than traditional compounds, such as non-functionalized block copolymers and commercial formulations commonly used to remove water from super-heavy crude oil. The existence of maximal water separation at a certain concentration of the functionalized copolymers was observed, and explained in terms of a saturation of the water/oil interphase with polymeric chains.
机译：石油工业必须面对的主要问题之一是越来越难以提取重质原油中存在的水和盐。高粘度以及大量的树脂和沥青烯有助于稳定分散在原油中的水滴，使石油更难以乳化，因此有必要开发新的脱水剂。合成了由中心嵌段聚环氧丙烷（PPO）和两个侧链环氧乙烷（EO）组成的一系列共聚物。然后将这些共聚物进行官能化处理，以将某些仲胺接枝到EO链段上，以增加它们与分散在石油中的水相的相互作用。根据超重质原油样品的重均分子量（M_w）调节官能化共聚物的平均分子量。通过瓶装测试评估从石油样品中去除的水分，主要改变官能团的种类和共聚物含量。观察到，这些新型破乳剂的性能要优于传统化合物，例如非官能化的嵌段共聚物和通常用于从超重质原油中除去水的商业配方。观察到在一定浓度的官能化共聚物中存在最大的水分离，并用聚合物链在水/油中间相的饱和度方面进行了解释。

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  • 来源
    《Fuel》 |2013年第1期|356-363|共8页
  • 作者

    Gabriel Cendejas; Felipe Arreguin; Laura V. Castro; Eugenio A. Flores; Flavio Vazquez;

  • 作者单位

    Programa de Ingenieria Molecular, Institute Mexicano del Petroleo, Eje Central Norte "Lazaro Cardenas", 152, San Bartolo Atepehuacan, CP 07730, Distrito Federal, Mexico;

    Programa de Ingenieria Molecular, Institute Mexicano del Petroleo, Eje Central Norte "Lazaro Cardenas", 152, San Bartolo Atepehuacan, CP 07730, Distrito Federal, Mexico;

    Programa de Ingenieria Molecular, Institute Mexicano del Petroleo, Eje Central Norte "Lazaro Cardenas", 152, San Bartolo Atepehuacan, CP 07730, Distrito Federal, Mexico,Escuela Superior de lngenieria Quimica e Industrias Extractivas, Institute Politecnico National, Unidad Profesional "Adolfo Lopez Mateos", Zacatenco, CP 07738, Distrito Federal, Mexico;

    Programa de Ingenieria Molecular, Institute Mexicano del Petroleo, Eje Central Norte "Lazaro Cardenas", 152, San Bartolo Atepehuacan, CP 07730, Distrito Federal, Mexico;

    Programa de Ingenieria Molecular, Institute Mexicano del Petroleo, Eje Central Norte "Lazaro Cardenas", 152, San Bartolo Atepehuacan, CP 07730, Distrito Federal, Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    demulsifiers; block copolymers; crude oil;

    机译：破乳剂嵌段共聚物原油;

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