Preparation method of high efficiency broad spectrum deemulsifier

Abstract

An efficient broad-spectrum demulsifier is prepared from propanediol and biphenol A through preparing the linear block copolyether or epoxy propane and epoxy ethane, enlarging chain by bibasic acid or its anhydride, and adding the ions of metal chosen from Fe, Co, Ni, Cu, Al, Cr, Zn, Mn and Sn to form match.

Description

[0001] Involved areas

[0002] The invention relates to a preparation method of a high-efficiency broad-spectrum demulsifier. Specifically, the demulsifier is obtained by adding polyvalent metal ions after several linear polyethers undergo chain extension reactions of dibasic acids or dibasic anhydrides. The demulsifier can be used The supramolecular structure is formed at the oil-water interface, which greatly enhances the performance of the demulsifier. This kind of demulsifier can be used not only for the dehydration of oilfield thin oil, heavy oil, and polymer injection production fluid, but also for the desalination of crude oil in petrochemical plants. Background of the invention:

[0003] Demulsifier is an important oilfield chemical agent in oilfields and refineries. At present, the research on demulsifiers at home and abroad mainly uses methods such as changing the head, changing the tail, adding bones, extending chains, grafting, cross-linking, and compounding to tre...