Broad-spectrum demulsifier for crude oil

Abstract

A broad-spectrum deemulsifier for crude oil contains the polymer of polyol, ethylene oxide and propylene oxide (20-50 wt.%), the polymen of polyamine, ethylene oxide and propylene oxide (20-50), pour depressor (10-20) and solvent (15-25). Its advantages are broad spectrum for more than 10 kinds of crude oils, and low dosage (5-10 ppm).

Description

technical field

[0001] The invention belongs to the field of petroleum processing, in particular to a broad-spectrum crude oil demulsifier. Background technique

[0002] At present, the imported crude oil processed by domestic coastal refineries is various and of different natures. From the perspective of process, equipment corrosion and economic efficiency, it needs to be blended or blended. Several crude oils, maybe even more. And the existing crude oil demulsifier has very strong pertinence, and a kind of demulsifier is only applicable to one or two kinds of crude oil. Therefore, the variety of crude oil is changed frequently, so the demulsifier must also be screened and replaced frequently, otherwise it will lead to poor desalination effect, aggravate corrosion of low temperature parts, and cause serious consequences.

[0003] Chinese patent applications 98113741.5 and 01113543.3 both disclose a crude oil demulsifier, which belongs to a polymer type crude oil demulsifi...