Synergestic Effect of pour point depressants and surfactant on the properties of crude oil fractions

ABSTRACT

The mutual interaction of asphaltene and wax fraction of high waxy crude oil were studied using infrared spectroscopy. Two pour point depressant were prepared by copolymerization of vinyl acetate and maleic anhydride then esterification of the copolymer obtained with tetradecyl / octadecyl alcohol [A and B] respectively. Nonionic surfactant was synthesized by alkylation of coal-tar phenol with dodecyl alcohol then reacting the alkyl phenol with formaldhyde and amine to produce the Mannish base. The Mannich base product was reacted with polyethylene glycol molecular weight [Mol.wt.] 4000 to produce the surfactant [C]. The synthesized products were characteristic by determination infrared spectral analysis and molecular weight. It was found that by adding the complex ABC or its components A, B, or AB to the crude very nice result in reducing the pour point at different concentration obtained. It has been shown from the research result of infrared spectrum of interaction between ABC at 1000 ppm or its compounds and wax or Asphaltene isolated from the crude that cocrystallization may be a primary factor in reducing the pour point of the crude, The position of the infrared absorption peak of asphaltene moved to lower wave number