Preparation of Poly-Hydrazide and Use as Pour Point Depressor for Heavy Oil

To develop new pour point depressor, in this work, a poly-hydrazide is designed and prepared from vegetable oil, hydrazine hydrate and epichlorohydrin. The effectiveness of the poly-hydrazides on four crude oils was tested as pour point depressants as well as paraffin inhibiters. The results showed that the highest pour point reduction depression was achieved as 9.8°C with 2000ppm PH3O-3 in 2# crude oil. Below the pour point of the crude and processed oils, paraffin crystals will deposit and tend to plug flow lines and filters. The saturated hydrocarbons were separated, and the paraffin crystal morphology studies were conducted to elucidate the mechanism of pour point reduction.