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Novel crude oil demulsifier and preparation method thereof

A technology of crude oil demulsifier and demulsifier, which is applied in the direction of chemical dehydration/demulsification to achieve good demulsification effect

Inactive Publication Date: 2012-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research on demulsifiers that fundamentally change the structure of polyether demulsifiers is rare.

Method used

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  • Novel crude oil demulsifier and preparation method thereof
  • Novel crude oil demulsifier and preparation method thereof
  • Novel crude oil demulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0048] A four-neck flask equipped with a stirrer and a condensing reflux device was placed in a water bath, and the temperature of the water bath was raised to 60° C., 41.4 grams of butyl acrylate and 55 grams of xylene were added, stirred evenly, replaced with nitrogen and continuously fed with nitrogen. Add 0.25 g of azobisisobutyronitrile as an initiator, stir evenly and add 1.1 g of acrylic acid, start to add acrylic acid dropwise after 15 minutes, add 2.2 g dropwise within 4 hours, and continue to react for 4 hours after the dropwise addition is completed. Thereafter, add 0.3 gram of hydroquinone as a terminator, then react at a constant temperature for 0.5 hours, then lower the temperature to obtain a white solution, according to the People's Republic of China national standard GB / T 1668-95 plasticizer acid value and the mensuration of acidity, use acid Alkali titration was used to measure the carboxyl content, and it was found that it contained 7.40% of acrylic acid unit...

no. 2 example

[0050] A four-neck flask equipped with a stirrer and a condensing reflux device was placed in a water bath, and the temperature of the water bath was raised to 60° C., 41.4 grams of butyl acrylate and 55 grams of xylene were added, stirred evenly, replaced with nitrogen and continuously fed with nitrogen. Add 0.25 g of azobisisobutyronitrile as an initiator, stir evenly, add 1.1 g of acrylic acid, add 1.1 g of acrylic acid every 1.5 hours, add acrylic acid three times, the total amount is 3.3 g, and continue the reaction at 60° C. for 4 hours. Thereafter, add 0.3 gram of hydroquinone as a terminator, then react at a constant temperature for 0.5 hours, then lower the temperature to obtain a white solution, according to the People's Republic of China national standard GB / T 1668-95 plasticizer acid value and the mensuration of acidity, use acid Alkali titration was used to measure the carboxyl group content, and it was found that it contained 7.38% of acrylic acid units, the numbe...

no. 3 example

[0052] The preparation method is the same as in Example 2, except that the solvent is methyl ethyl ketone, the amount of acrylic acid added in batches is 4.8 grams, and the total amount of acrylic acid is 14.4 grams. According to the national standard GB / T 1668-95 of the People's Republic of China for the determination of the acid value and acidity of plasticizers, the carboxyl content of the product was determined by acid-base titration, and it was found that it contained 25.85% of acrylic acid units, and the number average molecular weight was 72,000. The molecular weight distribution Mw / Mn was 2.95.

[0053] The preparation method of novel crude oil demulsifier of the present invention comprises the following specific steps:

[0054] Step 1, add butyl acrylate acrylic acid copolymer, polyether type demulsifier and solvent into the reactor, after the butyl acrylate acrylic acid copolymer and polyether type demulsifier are completely dissolved in the solvent, add acidic catal...

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Abstract

The invention relates to a novel crude oil demulsifier and a preparation method thereof. The novel crude oil demulsifier is prepared from esterified butyl acrylate acrylic acid copolymer and polyether demulsifier. Calculated according to a total weight of the butyl acrylate acrylic acid copolymer and the polyether demulsifier as 100%, the novel crude oil demulsifier comprises components of, by weight: 10-95% of the butyl acrylate acrylic acid copolymer, 5-90% of the polyether demulsifier, 0.1-3% of an acidic catalyst, 0.1-0.2% of a polymerization inhibitor of hydroquinone, and a solvent which is a good solvent for the butyl acrylate acrylic acid copolymer and the polyether demulsifier. According to the novel crude oil demulsifier and the preparation method thereof, the butyl acrylate acrylic acid copolymer and the polyether demulsifier with demulsification functions are subject to an esterification reaction. The prepared demulsifier provides a good demulsification effect upon crude oil emulsion.

Description

technical field [0001] The invention relates to a crude oil demulsifier and a preparation process, in particular to a novel crude oil demulsifier and a preparation method thereof. Background technique [0002] The demulsification and dehydration of crude oil emulsion is one of the important links in the process of oil production and gathering. At present, the most commonly used crude oil demulsification method in the petroleum industry is to add a demulsifier to the crude oil. [0003] Domestic research on demulsifiers is mainly based on polyether-type demulsifiers based on block polymers of ethylene oxide-propylene oxide monomers. In recent years, this type of demulsifier is only used in catalysts, initiators, chain extension Some changes were made in the reagent to increase the relative molecular mass. [0004] However, the composition and structure of crude oil emulsion are extremely complicated. The oil quality of the crude oil produced in the early, middle and late st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G81/02C08F220/18C08F220/06C08F8/14C08G65/00
Inventor 徐伟侯丹丹梁泽生田云峰
Owner CHINA PETROLEUM & CHEM CORP
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