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Positive and negative ion surfactant compound mixture and preparation method thereof

A technology of surfactants and positive and negative ions, which is applied in the field of positive and negative ion surfactant compound mixtures and its preparation, can solve the problem of little research on positive and negative ion surfactant compounding, difficult production fluid treatment of reservoirs, and injection-production systems Scaling and other problems, to achieve the effect of excellent interface performance, low production cost, ultra-low interfacial tension

Active Publication Date: 2017-07-07
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the oil displacement process of ASP flooding, the presence of a large amount of alkali will directly lead to many problems such as fouling of the injection-production system, difficulty in handling the produced fluid, and damage to the reservoir.
Although the charge density of ionic headgroups and the hydrophobicity of alkane chains of Gemini surfactants are significantly stronger than those of traditional surfactants, there are few studies on the compounding of positive and negative ionic surfactants based on Gemini surfactants.

Method used

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  • Positive and negative ion surfactant compound mixture and preparation method thereof
  • Positive and negative ion surfactant compound mixture and preparation method thereof
  • Positive and negative ion surfactant compound mixture and preparation method thereof

Examples

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Embodiment 1

[0050] This embodiment provides a compound mixture of positive and negative ion surfactants, which is compounded by sulfonate type Gemini surfactant SGS and cetyltrimethylammonium bromide (CTAB).

[0051] The compound mixture of positive and negative ionic surfactants of the present embodiment is prepared through the following steps:

[0052] The sulfonate type Gemini surfactant SGS was prepared from brominated n-alkanes with carbon chain lengths of 8-16, ethylenediamine and propanesultone as raw materials:

[0053] Take 5.4g of ethylenediamine into a three-necked flask, add 100mL of absolute ethanol, add 16.4g of brominated n-alkane with a carbon chain length of 8-16 dropwise with stirring, and reflux for 48h at 80°C; use thin layer chromatography (TLC) to detect the reaction Process, after the reaction is completely carried out, the dehydrated ethanol is evaporated under reduced pressure to obtain a light yellow solid powder; the obtained solid is washed with ether for sever...

Embodiment 2

[0060] This embodiment provides a compound mixture of positive and negative ion surfactants, which is compounded by sulfonate type Gemini surfactant SGS and dodecyl trimethyl ammonium chloride (DTAC).

[0061] The compound mixture of positive and negative ionic surfactants of the present embodiment is prepared through the following steps:

[0062] The sulfonate type Gemini surfactant SGS was prepared from brominated n-alkanes with carbon chain lengths of 8-16, ethylenediamine and propanesultone as raw materials:

[0063] Take 5.4g of ethylenediamine into a three-necked flask, add 100mL of absolute ethanol, add 16.4g of brominated n-alkane with a carbon chain length of 8-16 dropwise with stirring, and reflux for 48h at 80°C; use thin layer chromatography (TLC) to detect the reaction Process, after the reaction is completely carried out, the dehydrated ethanol is evaporated under reduced pressure to obtain a light yellow solid powder; the obtained solid is washed with ether for ...

Embodiment 3

[0070] This embodiment provides a compound mixture of positive and negative ion surfactants, which is compounded by sulfonate type Gemini surfactant SGS and quaternary ammonium salt type Gemini surfactant (CD2N).

[0071] The compound mixture of positive and negative ionic surfactants of the present embodiment is prepared through the following steps:

[0072] The sulfonate type Gemini surfactant SGS was prepared from brominated n-alkanes with carbon chain lengths of 8-16, ethylenediamine and propanesultone as raw materials:

[0073] Take 5.4g of ethylenediamine into a three-necked flask, add 100mL of absolute ethanol, add 16.4g of brominated n-alkane with a carbon chain length of 8-16 dropwise with stirring, and reflux for 48h at 80°C; use thin layer chromatography (TLC) to detect the reaction Process, after the reaction is completely carried out, the dehydrated ethanol is evaporated under reduced pressure to obtain a light yellow solid powder; the obtained solid is washed wit...

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Abstract

The invention provides an anionic and cationic surfactant compound mixture and a preparation method thereof. The compound mixture comprises a single-chain cationic surfactant and / or cationic Gemini surfactant and an anionic Gemini surfactant, wherein the anionic Gemini surfactant comprises a sulfonate Gemini surfactant (SGS); the single-chain cationic surfactant comprises cetyl trimethyl ammonium bromide and / or dodecyl trimethyl ammonium chloride; and the cationic Gemini surfactant comprises a quaternary ammonium salt Gemini surfactant CD2N. Compared with a conventional oil-displacement surfactant, the compound mixture provided by the invention has the advantages of capability of generating ultralow interface tension, more superior interface performance, high stability, low raw material cost, low production cost and wide application prospect, and is easy to prepare.

Description

technical field [0001] The invention relates to a compound mixture of positive and negative ionic surfactants and a preparation method thereof, in particular to a compound mixture of positive and negative ionic surfactants based on Gemini surfactants capable of producing ultra-low interfacial tension and a preparation method thereof, belonging to surface The field of active agent technology. Background technique [0002] As an important strategic material, petroleum plays a pivotal role in economic and social development. Tertiary oil recovery technology refers to the oil displacement method that uses new technologies such as physics, chemistry, and biology to extract remaining oil after using natural energy for extraction and traditional artificial supplementary energy (water injection, gas injection) for extraction. At present, many oil displacement methods are used in the tertiary recovery of crude oil. From the current practice, the surfactant, polymer and alkali triple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 赖璐梅平吴小梅吴娟郑延成侯聪
Owner PETROCHINA CO LTD
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