Preparation and evaluation of some surfactants as pour point depressants in oil fieldAuthor(s): F.M.Ghuiba, T.T.Khidr*, S.A.Mahmoud
Three surfactants additives were synthesized by esterfication of polyethylene glycol with adibic, phythalic and citric acid then reesterfication of polyethyleneglycol adipate acid (A), phythalate acid (P) and citrate (C) with triethanolamine. The prepared surfactants were evaluated as surfactants by surface tension and critical micelle concentration. It has been found that A additive is more efficient as pour point ïÂÂpp 2000ppm = 12oC than P and C, ïÂÂpp 2000ppm = 9oC and 6oC. Blends between the best of additive A with commercial flow improver CFI and Natural wax dispersant NWD were done and evaluated as pour point depressants (500:1000:500), ïÂÂpp 2000ppm = -21oC.