A kind of preparation method of modified dendritic polyamide-amine inverse demulsifier

Abstract

The invention provides a preparation method of a modified dendritic polyamide-amine reverse demulsifier. The preparation method comprises the following steps: dissolving a dendritic polyamide-amine compound and long-chain alkyl dimethyl epoxy propyl ammonium chloride in a solvent, carrying out uniform stirring, and then carrying out heating to 70-110 DEG C, carrying out a reaction for 2-4 hours toobtain a brownish red viscous liquid, wherein the mass ratio of the dendritic polyamide-amine compound to the long-chain alkyl dimethyl epoxy propyl ammonium chloride to the solvent is (20-35):(20-35):(30-10). The preparation method provided by the invention has the advantages of low cost, simple and safe process and high yield; the obtained reverse demulsifier has a high-efficiency reverse demulsification capability, is applicable to oil-containing sewage treatment, and can be used with a demulsifier synergistically; the problem of difficult treatment of thick oil and a produced liquid of athick oil field is effectively solved; and the advantages of high dehydration rate, uniform interface, and good water-phase cleanliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, and in particular relates to a preparation method of a modified dendritic polyamide-amine reverse phase demulsifier. Background technique [0002] With the further development of oilfields, the proportion of oil-in-water (O / W) emulsion in oilfield production fluid is increasing, the degree of emulsification of O / W emulsion is more serious, the structure of oil-water interface is more complex, and the treatment of demulsification is difficult It will also be larger. A single demulsifier is difficult to meet the needs of practical applications. It is often necessary to use an inverse demulsifier in combination to achieve the ideal oil-water separation effect. At present, the inverse demulsifiers used for O / W emulsion demulsification at home and abroad include low molecular electrolytes, alcohols, surfactants and polymers. These conventional inverse demulsifiers have played a certain ro...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art in the exploitation of crude oil, especially in the exploitation of heavy oil and ultra-heavy oil, the reverse phase demulsifier is used in a large amount, the effect is poor, and oil-water separation is difficult. Preparation method of modified dendritic polyamide-amine with good phase cleanliness