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Novel broad-spectrum crude oil demulsifying agent and preparation method thereof

A crude oil demulsifier and demulsifier technology, which is applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of inability to meet the needs of industrial production and high demulsification temperature, and achieve the effect of good demulsification effect.

Inactive Publication Date: 2015-04-08
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of the previous polyether-type non-ionic demulsifiers are less dosage and better demulsification and dehydration effects, so they are widely used in crude oil demulsification and dehydration. Therefore, there is an urgent need for a new type of demulsifier with good demulsification performance and strong broad spectrum

Method used

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  • Novel broad-spectrum crude oil demulsifying agent and preparation method thereof
  • Novel broad-spectrum crude oil demulsifying agent and preparation method thereof
  • Novel broad-spectrum crude oil demulsifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Weigh 59.086g of tea polyphenols and 108.329g of diethylenetriamine in a 250mL four-neck bottle, stir for 30min at room temperature and under a nitrogen atmosphere, heat up to 70°C and continue stirring until the tea polyphenols are completely dissolved, and then After continuing to stir for 30 minutes, add 18.919 g of formaldehyde solution dropwise at a rate of 1 drop / s using a constant pressure dropping funnel. After the dropwise addition is completed, continue stirring at a constant temperature for 3 hours under a nitrogen atmosphere. Repeated several times to obtain a sufficient amount of product.

[0032] The obtained product should be distilled under reduced pressure at 150°C and 1.33kPa for 5 hours to remove excess formaldehyde, diethylenetriamine and reaction by-product water, and finally obtain a reddish-brown viscous liquid - tea polyphenol amine type Phenolic resin starter.

Embodiment 2

[0036] Weigh 59.086g of tea polyphenols and 108.329g of diethylenetriamine in a 250mL four-necked bottle, stir for 30 minutes at room temperature and nitrogen atmosphere, and continue stirring after raising the temperature to 70°C until the tea polyphenols are completely dissolved, and then continue stirring for 30 minutes 18.919g of formaldehyde solution was added dropwise at a rate of 1 drop / s with a constant pressure dropping funnel. After the dropwise addition was completed, the constant temperature stirring was continued for 3h under a nitrogen atmosphere. Repeated several times to obtain a sufficient amount of product.

[0037] The obtained product should be distilled under reduced pressure at 150°C and 1.33kPa for 5 hours to remove excess formaldehyde, triethylenetetramine and reaction by-product water, and finally obtain a reddish-brown viscous liquid - tea polyphenol amine type Phenolic resin starter.

[0038] 100 g of the initiator prepared in Example 2 and 1 g of p...

Embodiment 3

[0040] Weigh 59.086g of tea polyphenols and 108.329g of diethylenetriamine in a 250mL four-necked bottle, stir for 30 minutes at room temperature and nitrogen atmosphere, and continue stirring after raising the temperature to 70°C until the tea polyphenols are completely dissolved, and then continue stirring for 30 minutes 18.919g of formaldehyde solution was added dropwise at a rate of 1 drop / s with a constant pressure dropping funnel. After the dropwise addition was completed, the constant temperature stirring was continued for 3h under a nitrogen atmosphere. Repeated several times to obtain a sufficient amount of product.

[0041]The obtained product should be distilled under reduced pressure at 150°C and 1.33kPa for 5 hours to remove excess formaldehyde, tetraethylenepentamine and reaction by-product water, and finally obtain a reddish-brown viscous liquid - tea polyphenol amine type Phenolic resin starter.

[0042] 100 g of the initiator prepared in Example 2 and 3 g of ...

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Abstract

The invention relates to a novel broad-spectrum crude oil demulsifying agent and a preparation method thereof. The preparation method comprises the following steps: by taking a tea polyphenol amine type phenolic resin as an initiator, performing ring opening polymerization on epoxypropane and ethylene oxide under the conditions of the temperature of less than 130 DEG C and the pressure of less than 0.25MPa, thereby obtaining an amphiphilic block polyether demulsifying agent of ethylene oxide and epoxypropane by taking the tea polyphenol amine type phenolic resin as the initiator. The demulsifying agent prepared by the invention has an excellent effect of demulsifying oilfield produced water, the raw material adopted by the initiator refers to a natural and non-toxic food antioxidant, namely tea polyphenol, and the demulsifying agent has the advantages of easily available raw materials, environment friendliness, high biodegradability, multiple active groups and good demulsifying and dewatering effects of the synthetic demulsifying agent and also has the characteristics of small amount, low demulsifying temperature, environment friendliness, pollution elimination and wide broad spectrum model.

Description

Technical field: [0001] The invention relates to a block polyether demulsifier using tea polyphenol amine type phenolic resin as a starting agent and a preparation method thereof. Background technique: [0002] With the continuous development and application of oil recovery technology, the crude oil emulsion has become more and more stable, which increases the water content of the oil field production fluid year by year, aggravating the difficulty of demulsification and dehydration of crude oil, and increasing the storage, transportation, and refining process. The equipment load in the process increases the fuel consumption in the heating process. Therefore, demulsifier is one of the indispensable chemical reagents in today's oil fields and refineries as a surfactant that can quickly and efficiently remove the water content in crude oil. [0003] Since the 1950s, the demulsifiers studied at home and abroad are mainly high-molecular non-ionic surfactants based on propylene o...

Claims

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Application Information

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IPC IPC(8): C08G65/28C10G33/04
Inventor 王洪国马梦瑶许维丽刘淼周淑飞廖克俭姜林
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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