A preparation method for high waxy crude oil demulsifier with wax content not less than 20%

A crude oil demulsifier and wax content technology, applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of poor dehydration effect, achieve strong safety, simple operation, and suitable for popularization and use

Active Publication Date: 2021-07-20
DESHI ENERGY TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crude oil demulsifier obtained by this conventional preparation method is suitable for waxy crude oil, and has a poor dehydration effect on high waxy crude oil with a wax content higher than 20%.

Method used

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  • A preparation method for high waxy crude oil demulsifier with wax content not less than 20%
  • A preparation method for high waxy crude oil demulsifier with wax content not less than 20%

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: the preparation technology of crude oil demulsifier:

[0027] (1) Preparation of starter

[0028] In a four-neck flask equipped with a stirring device, an electric heating temperature control device, and a reflux condenser, add 1500# solvent oil, then add nonylphenol, and formaldehyde with a content of 37-50%, and heat up to 90-110°C. And add sulfonic acid, reflux reaction for 1-3 hours, remove excess water and solvent to obtain novolac polycondensate;

[0029] (2) Preparation of crude oil demulsifier

[0030] Add the uniformly mixed ethylene oxide and propylene oxide into the reaction kettle, vacuumize and replace with nitrogen for 2 to 4 times, start stirring and raise the temperature to 90-100°C, start the vacuum pump to vacuum, when the temperature continues to rise to 120°C Stop the vacuum, then put the novolac polycondensate and catalyst potassium methylate into the reactor, the reaction temperature is 130-140°C, the reaction is 0.5-0.8h, and the r...

Embodiment 2

[0034] Example 2: Characterization

[0035] The high waxy crude oil that adopts in the present embodiment is used as experimental oil, and wax content is 23%, and colloidal asphaltenes content is 10-15%, and this crude oil water content (V / V) is 50%, that is, in 80ml emulsified crude oil The water content is 40ml, and the dehydration temperature is 75°C; the dosing concentration is 100ppm when the crude oil is dehydrated.

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Abstract

This application proposes a preparation method for a high waxy crude oil demulsifier with a wax content of not less than 20%. A step in which the mixture of ethylene oxide and propylene oxide undergoes random copolymerization to obtain a crude oil demulsifier. In this application, the crude oil demulsifier obtained by the random copolymerization reaction between initiator and ethylene oxide and propylene oxide is similar to the structure of the wax in crude oil, and the crude oil demulsifier in this application is more effective by using the principle of similar compatibility. Helps demulsification and dehydration of highly condensed and highly waxy crude oil.

Description

technical field [0001] The application relates to the field of petrochemical technology, in particular to a preparation method for a high-waxy crude oil demulsifier with a wax content of not less than 20%. Background technique [0002] The crude oil extracted from the oil well contains water, and salt and other impurities are dissolved in the water. The water content of the crude oil will increase the load on the pipeline and equipment, cause corrosion and scaling on the pipeline and equipment, and more seriously, cause catalyst poisoning. Therefore, crude oil dehydration must be carried out before crude oil is sent, and the water content of crude oil entering the oil pipeline is generally limited to less than 1%, and my country stipulates that the water content of purified crude oil is less than 0.5%. Because crude oil contains natural surface active substances such as wax, colloid, asphaltene, etc., they are adsorbed on the oil-water interface to form an interfacial film w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 崔仕章王黎明郭玉玺谷之辉于长禄张向红殷会良
Owner DESHI ENERGY TECH GRP CO LTD
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