Preparation method of efficient demulsifier suitable for high-solidification-point crude oil

Abstract

The invention discloses a preparation method of an efficient demulsifier suitable for high-solidification-point crude oil, which comprises the following steps that S1, a reaction is conducted on bisphenol A and vinylamine under the condition of introducing N2 by utilizing Mannich reaction; S2, the phenol-amine resin initiator and the basic catalyst which are quantitatively prepared in the step S1 are taken and added into a high-pressure reaction kettle at the same time, and a phenol-amine resin diblock polyether demulsifier is obtained; S3, the temperature of the phenol-amine resin diblock polyether demulsifier generated in the step S2 is increased to 115-125 DEG C, triblock polyether is obtained, and the product obtained through the reaction is the triblock polyether with the initiator-PO-EO-PO structure. The high-efficiency demulsifier provided by the preparation method of the demulsifier can better realize demulsification and dehydration of crude oil without high temperature or an external electric field, so that the energy consumption is reduced, the benefit is increased, one more block is added compared with two blocks in the prior art, the dehydration rate is improved, and the demulsification efficiency of the crude oil is improved.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency demulsifier, more precisely, a preparation method of a high-efficiency demulsifier suitable for high-condensation crude oil. Background technique [0002] In recent years, most oil fields in my country have entered the middle and late stage of development, and the water content of crude oil is also gradually increasing. Secondly, the natural emulsifiers such as colloids, asphaltenes, solid particles, etc. in crude oil components, and the oil displacement process Various surfactants, polymers, etc. are added, so that the crude oil production process is more complicated, and it also increases the difficulty of crude oil demulsification. Demulsification methods are mainly divided into chemical demulsification method, physical demulsification method, biological demulsification agent method, combined demulsification method and membrane demulsification method. At present, the chemical demulsi...

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Problems solved by technology

[0003] At present, most of the demulsifiers used in China are non-ionic surfactants of polyoxyethylene polyoxypropylene type, which require high temperature and poor separation degree when separating oil and water in crude oil, and require high temperature or external electric field and A good demulsification effect can only be achieved in a long period of time, so an efficient demulsifier is urgently needed to achieve the task of oil-water separation at a lower temperature

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