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Nano imbibition agent as well as preparation method and application thereof

An imbibition agent and nanotechnology, applied in the field of nano imbibition agent preparation, can solve the problems of weak dialysis ability, poor temperature resistance, low water solubility, etc., and achieve the effects of preventing secondary aggregation, good stability and simple operation.

Active Publication Date: 2022-04-19
甘肃智仑新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of nano osmotic agent and its preparation method and application, in order to solve the problems of low water solubility, poor temperature resistance, poor solubility and dialysis ability of chemical agents currently used. weak technical issues

Method used

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  • Nano imbibition agent as well as preparation method and application thereof
  • Nano imbibition agent as well as preparation method and application thereof
  • Nano imbibition agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A preparation method of nano absorbent, comprising the following steps:

[0041] Mix 9.6g of citric acid and 68.7g of polyoxyethylene (n=10) in 467.5g of solvent dimethylformamide, raise the temperature to 95°C, and carry out the first step of reaction, and react for 2 hours to obtain a mixed solution after reaction . Control the temperature of the mixed solution after the reaction at 30°C, then add 15.2g of octadecyl chloride to the mixed solution after the reaction to carry out the second step reaction, react for 4h, obtain the reaction solution after the reaction, concentrate the reaction solution, and use toluene The product was purified and separated by column chromatography, and vacuum-dried to constant weight to obtain a nano-absorbent.

Embodiment 2

[0043] A preparation method of nano absorbent, comprising the following steps:

[0044]Mix 9.6g of citric acid and 139.2g of polyoxyethylene (n=20) in 488.0g of solvent dimethylformamide, raise the temperature to 95°C, and carry out the first step of reaction, and react for 2 hours to obtain a mixed solution after reaction . Control the temperature of the mixed solution after the reaction at 30°C, then add 13.8g of octadecyl chloride to the mixed solution after the reaction to carry out the second step reaction, react for 4h, obtain the reaction solution after the reaction, concentrate the reaction solution, and use toluene The product was purified and separated by column chromatography, and vacuum-dried to constant weight to obtain a nano-absorbent.

Embodiment 3

[0046] A preparation method of nano absorbent, comprising the following steps:

[0047] Mix 10.6g of citric acid and 75.6g of polyoxyethylene (n=10) in 411.6g of solvent dimethylformamide, raise the temperature to 90°C, and perform the first step of reaction, and react for 2 hours to obtain a mixed solution after reaction . Control the temperature of the mixed solution after the reaction at 25°C, then add 16.7g of octadecyl chloride to the mixed solution after the reaction to carry out the second step reaction, react for 3h, obtain the reaction solution after the reaction is completed, concentrate the reaction solution, and use toluene The product was purified and separated by column chromatography, and vacuum-dried to constant weight to obtain a nano-absorbent.

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Abstract

The invention discloses a nano imbibition agent as well as a preparation method and application thereof, belongs to the technical field of nano imbibition agent preparation, and solves the technical problems of low water solubility, poor temperature resistance, poor solubility and weak dialysis capacity of a chemical agent used at present. The preparation method of the nano imbibition agent comprises the following steps: firstly, mixing a certain amount of polyoxyethylene and citric acid in a solvent dimethylformamide to carry out first-step esterification reaction; and adding a certain amount of long-chain alkyl acyl chloride into the reaction liquid to carry out a second-step reaction, wherein the obtained product is the nano imbibition agent. The nano imbibition agent can be decomposed into citric acid, polyoxyethylene and long-chain alkyl salt through reversible reaction at high temperature, can effectively disperse organic plugging substances, and is an important auxiliary agent in the plugging removal process.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano osmotic agent, and in particular relates to a nano osmotic agent and its preparation method and application. Background technique [0002] With the continuous production of oil wells in various operating areas of the oilfield, corrosion inhibitors and various additives in the well-entry fluid undergo high-temperature degradation, and the split small molecular organic matter and inorganic mixtures (wellbore pipe string corrosion products, wellbore cuttings and barium sulfate) agglomerate , condensation, and organic-inorganic composite blockages are formed in the wellbore string, and many single wells have serious wellbore blockages, resulting in the failure of normal production of the oil well and seriously restricting the production capacity of the oil well. [0003] Organic-inorganic composite blockages are difficult to dissolve in water and common acids. Due to the depth of the well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52C07C67/08C07C69/704C07C67/14C07C69/67C08G65/332
CPCC09K8/52C07C67/08C07C67/14C08G65/3322C09K2208/10C08G2650/04C07C69/704C07C69/67
Inventor 王晨侯妍张康杨晓武代方方王海花
Owner 甘肃智仑新材料科技有限公司
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