Alkylphenol polyoxyethylene ether carboxylate type betaine and preparation method thereof

A technology of alkylphenol polyoxyethylene ether carboxylate and alkylphenol polyoxyethylene ether, applied in the field of alkylphenol polyoxyethylene ether carboxylate betaine and its preparation, can solve the problem of poor oil displacement efficiency, Formation and oil well damage, corrosion equipment and pipelines, etc., to achieve the effect of reducing huge damage, best temperature resistance, and superior salt resistance

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salinity conditions, and at the same time, due to alkali, it will cause damage to the formation and oil well, and cause Corrosion equipment and pipeline problems, providing a new type of alkylphenol polyoxyethylene ether carboxylate betaine surfactant

Method used

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  • Alkylphenol polyoxyethylene ether carboxylate type betaine and preparation method thereof
  • Alkylphenol polyoxyethylene ether carboxylate type betaine and preparation method thereof
  • Alkylphenol polyoxyethylene ether carboxylate type betaine and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] Synthesis of amyl (R = 5) phenol polyoxyethylene (n = 2) ether carboxylate sodium betaine

[0031] 1) Synthesis of chloropentyl (R=5) phenol polyoxyethylene (n=2) ether

[0032] Add 100g of pentyl (R=5) phenol polyoxyethylene (n=2) ether and 57g of pyridine into a four-necked round-bottomed flask equipped with a reflux condensing device, a thermometer, a stirrer and a gas absorption device, and heat to 70 under stirring. °C, slowly add 85 g of thionyl chloride dropwise with a dropping funnel, and react at 90 °C for 10 hours after the dropwise addition is completed. After the reaction, the reactants were left to stand, cooled and separated into layers. The upper organic phase was the target product, and the lower layer was solid pyridinium hydrochloride. Use 30% sodium hydroxide solution to neutralize the upper organic phase to neutral or weakly alkaline, separate the inorganic salt, then wash the upper organic phase with hot saturated saline for 5 to 6 times, and obtai...

Embodiment 2

[0038] Synthesis of Nonyl (R=9) Phenol Polyoxyethylene Ether (n=10) Sodium Carboxylate Betaine

[0039] 1) Synthesis of Chlorinated Nonyl (R=9) Phenol Polyoxyethylene (n=10) Ether

[0040] Add 100g of nonyl (R=9) phenol polyoxyethylene (n=10) ether and 22g of pyridine into a four-neck round bottom flask equipped with a reflux condensing device, a thermometer, a stirrer and a gas absorption device, and heat to 70 32.5 g of thionyl chloride was slowly added dropwise with a dropping funnel, and reacted at 70°C for 8 hours after the dropwise addition was completed. After the reaction, the reactants were left to stand, cooled and separated into layers. The upper organic phase was the target product, and the lower layer was solid pyridinium hydrochloride. Use 30% sodium hydroxide solution to neutralize the upper organic phase to neutral or weakly alkaline, separate the inorganic salt, then wash the upper organic phase with hot saturated saline for 5 to 6 times, and obtain the inter...

Embodiment 3

[0046] Synthesis of Sodium Carboxylate Betaine of Dodecylphenol Polyoxyethylene Ether (n=20)

[0047] 1) Synthesis of chlorinated dodecylphenol polyoxyethylene (n=20) ether

[0048] Add 100g of dodecylphenol polyoxyethylene (n=20) ether and 13g of pyridine into a four-neck round bottom flask equipped with a reflux condensing device, a thermometer, a stirrer and a gas absorption device, heat to 60°C under stirring, and use 18.7 g of thionyl chloride was slowly added dropwise into the dropping funnel, and reacted at 80° C. for 10 hours after the dropwise addition was completed. After the reaction, the reactants were left to stand, cooled and separated into layers. The upper organic phase was the target product, and the lower layer was solid pyridinium hydrochloride. Use 30% sodium hydroxide solution to neutralize the upper organic phase to neutral or weakly alkaline, separate the inorganic salt, then wash the upper organic phase with hot saturated saline for 5 to 6 times, and o...

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Abstract

The invention relates to an alkylphenol polyoxyethylene ether carboxylate type betaine surfactant and a preparation method thereof. The objective of the invention is mainly to solve the problems in the prior art that a surfactant used as an oil displacement agent has a poor displacement effect under the condition of high temperature and high salinity and poses immense damage to strata and oil wells, corrosion to equipment and conveying pipelines, pollution to environment and the like due to presence of alkali in the surfactant. According to the invention, the technical scheme that alkylphenol polyoxyethylene ether carboxylate type betaine having a general molecular formula as described in the specification is employed, M in the formula is any one selected from the group consisting of alkali metals and alkaline earth metal, R is C1 to C20 alkyl, and n is an arbitrary integer in the range from 1 to 30 enables the problems in the prior art to be solved well and can be used in reinforced oil production in oil fields.

Description

technical field [0001] The invention relates to an alkylphenol polyoxyethylene ether carboxylate type betaine and a preparation method thereof. Background technique [0002] Most of my country's oil fields are now in the stage of high water-cut exploitation, and more than 60% of the oil is still "left behind" underground. Moreover, most of the oilfields developed by water flooding have entered the "double high" stage of high water cut and high recovery, and the problem of "multiple wells and low production" is unavoidable. According to the survey of 82 water injection development zones in 13 major oilfields in my country, the water content of the output fluid reaches 90% at present, and the output decreases by 15 million tons every year. Faced with these problems, it is imperative to rely on technological progress to improve oil recovery and increase recoverable reserves in an all-round way. If the remaining underground oil is extracted, it is equivalent to more than doubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/12C07C227/08C08G65/00C09K8/584C09K8/588
Inventor 孙文彬李应成袁明张慧
Owner CHINA PETROLEUM & CHEM CORP
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