Preparation and Application of Cross-linked Polyamine Amide Flow Improvers for Heavy Oil

Polyamine amide was prepared from fatty acid, polyamine and trioxane as raw materials. The effect of fl ow improvers on the pour point and viscosity of heavy oil was evaluated. The result indicated this series of a new type fl ow improver could depress the pour point of heavy oil, among which the highest pour point depression was 2.2 ℃. This series of a new type fl ow improver also could reduce the viscosity of heavy oil. Date analysis showed that the amine structure effect on the effi ciency greatly, while fatty acid structure was insignifi cant. When polyamine amide molecular main chain contained less nitrogen atoms, effi ciency of short chain alkyl structure was slightly better than the long chain alkyl. But as the number of nitrogen atoms increased, effi ciency of long chain alkyl structure on heavy oil viscosity reduction increased. The most effective polyamine amide showed potent viscosity reduction and the highest reduction rate of 32.7% with less nitrogen atoms and short chains.