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Preparation method for intermediate base-cycloalkyl crude oil emulsion de-emulsifier and product thereof

A technology of naphthenic crude oil and demulsifier, which is applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of high demulsification temperature, slow demulsification speed and poor adaptability, and achieves simple synthesis process, mild operating conditions, The effect of low production cost

Active Publication Date: 2012-11-21
克拉玛依市天明化工有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of using naphthenic heavy oil is poor adaptability, slow demulsification speed, low final water removal, and no obvious gradient change in the demulsification process
And the amount of demulsifier is required to be large, etc.
[0004] Chinese patent CN1810933A is a heavy oil demulsifier and its preparation method, which discloses that the heavy oil demulsifier product is suitable for demulsification of extra heavy oil in Liaohe Oilfield, but not suitable for demulsification of extra thick crude oil in Karamay area
[0005] The current use of demulsifier products is mainly to solve the problems of high demulsification temperature, large dosage and unsatisfactory dehydration speed in the existing technology

Method used

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  • Preparation method for intermediate base-cycloalkyl crude oil emulsion de-emulsifier and product thereof
  • Preparation method for intermediate base-cycloalkyl crude oil emulsion de-emulsifier and product thereof
  • Preparation method for intermediate base-cycloalkyl crude oil emulsion de-emulsifier and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 50kg of tetraethylenepentamine to the autoclave, 1.5kg of potassium hydroxide catalyst and control the temperature of the autoclave at 110-120°C to control the pressure of the autoclave to 0.2-0.3MPa, inject 800kg of ethylene oxide into the autoclave for polymerization reaction to obtain oil head A. Take 100kg of synthetic oil head A and put it into the reaction kettle, heat it to 134-150°C, add 2.5kg of potassium hydroxide catalyst, inject 660kg of propylene oxide into the polymerization reaction with nitrogen pressure, and inject ethylene oxide with nitrogen pressure at 110-128°C 200kg of alkanes were polymerized to obtain block polyether macromolecular compounds. After the synthetic block polyether is neutralized, bleached, filtered, etc., take 550kg and put it into the mixing tank, add 220kg of methanol, 200kg of water, 5kg of synergist butyl cellosolve, and stir for 1 to 2 hours to obtain the demulsifier The product number is 1# demulsifier.

Embodiment 2

[0024] Add 120kg of pentaethylenehexamine to the autoclave, 2.0kg of catalyst is a mixture of potassium hydroxide and calcium hydroxide in a 2:1 weight ratio, heat up to 105-125°C, adjust the pressure range to 0.1-0.32MPa, use nitrogen pressure Add 800kg of ethylene oxide to the polymerization reaction to obtain the oil head A. Take 150kg of synthetic oil head A and put it into the reaction kettle, heat it to 110-145°C, add 2.0kg of potassium hydroxide catalyst, press nitrogen into 800kg of propylene oxide at 145°C for polymerization reaction, and press nitrogen into it at 115-130°C 550 kg of ethylene oxide was polymerized to obtain a block polyether macromolecular compound. After the synthetic block polyether is neutralized, bleached and filtered, take 700kg, 300kg of water, and 350kg of methanol into the reaction kettle, add 5kg of synergist hydrochloric acid, stir well before adding, and heat up to 60-80°C , and react for 1 to 1.5 hours to complete the reaction to obtain t...

Embodiment 3

[0026] Add 120kg of ethylenediamine to the autoclave, mix 1.5kg of catalyst with calcium hydroxide and sodium hydroxide in a weight ratio of 1:2, raise the temperature to 105-125°C, adjust the pressure range to 0.15-0.25MPa, and press nitrogen into the ring Oxyethane 900kg, polymerization obtains oil head A. Take 100kg of synthetic oil head A and put it into the reaction kettle, heat it to 128-146°C, add 2.5kg of sodium hydroxide catalyst, inject 720kg of propylene oxide with nitrogen pressure at 130-145°C, and use nitrogen pressure at 120-130°C Add 550 kg of ethylene oxide, and polymerize to obtain a block polyether macromolecular compound. After the synthetic block polyether is neutralized, bleached and filtered, 800kg, 310kg of water and 400kg of ethanol are put into the reaction kettle, and 6kg of synergist formic acid is added, stirred and heated at 40-60°C for 1-1.5 hours to complete. Promptly obtain the demulsifier product, numbered as 3# demulsifier.

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Abstract

The invention relates to a preparation method for an intermediate base-cycloalkyl crude oil emulsion de-emulsifier and a product thereof, which belongs to the chemical used for petroleum industry technical field. According to the invention, polyamine or polyethylene polyamine as an initiator, and is copolymerized with epoxypropane and ethylene oxide, post-treated to obtain a block polyether product, the obtained block polyether is complexed with alcohol water according to a certain proportion, and a synergy auxiliary agent is added to obtain the de-emulsifier with characteristics of low temperature, rapidity and high efficiency. The present invention solves the problems of the prior art, such as high demulsifying temperature, large use level and poor dehydration speed of intermediate base-cycloalkyl crude oil emulsion in Karamay region. The de-emulsifier has the advantages of low temperature, rapidity, high efficiency and wide application scope.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, and in particular relates to a preparation method of an intermediate group-cycloalkyl emulsion crude oil demulsifier and a product thereof. Background technique [0002] Water in crude oil is a common phenomenon in the development of oil and gas fields. It not only brings a series of difficulties to crude oil extraction, but also has adverse effects on oil and gas gathering and transportation, processing and refining. Therefore, crude oil dehydration is an essential link in the crude oil production process. As oilfields take measures to increase water injection and steam injection to increase oil well fluid production in large areas, the water content of oil well produced fluids rises rapidly. At the same time, a large number of applications of various oil recovery additives have also made crude oil, especially in recent years, with the promotion of tertiary oil ...

Claims

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Application Information

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IPC IPC(8): C10G33/04C08G65/26
Inventor 王明宪王新龙许海涛李玉军杨利吴伟龙
Owner 克拉玛依市天明化工有限责任公司
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