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Phosphate ester oligomer natural gas drag reducer and synthesis method and application thereof

A synthesis method and oligomer technology, applied in phosphorus organic compounds, chemical instruments and methods, gas/liquid distribution and storage, etc., can solve the problem of insignificant drag reduction effect, inability to apply natural gas pipeline drag reduction on a large scale, and scope of application Restrictions and other issues

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in the current reported patents and literature, mainly because the product has a single polar end, weak adsorption, and few non-polar ends (such as octadecyl alcohol phosphate ammonium salts), the drag reduction effect is not obvious, and the solubility is poor (such as six-membered cycloalkylsiloxane-phosphate esters), which cannot be widely used for drag reduction in natural gas pipelines, so the application range is greatly limited, and the drag reduction effect needs to be further improved

Method used

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  • Phosphate ester oligomer natural gas drag reducer and synthesis method and application thereof
  • Phosphate ester oligomer natural gas drag reducer and synthesis method and application thereof
  • Phosphate ester oligomer natural gas drag reducer and synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 153.3g of phosphorus oxychloride, 1.33g of anhydrous aluminum trichloride and 600mL of methyl ethyl ketone into a 3000mL four-necked bottle equipped with a reflux condenser, a thermometer, a stirrer, and a constant pressure dropping funnel, and cool the four-necked bottle to - 10°C and maintained for 20min, slowly drop 74.1g of n-butanol under stirring, and control the temperature of the system not to exceed 0°C. And react at -5~5°C for 2h. Raise the temperature to 20°C and react for 2h. Slowly add 62.1 g of ethylene glycol dropwise at 20°C, control the system temperature not to exceed 30°C, and react at 30°C for 2 hours, then raise the temperature to 50°C, and react for 4 hours. Add 9.2 g of ethanol at 50° C., and reflux for 4 hours. The reaction ends when the pH value of the solution is close to neutral. The crude product was washed with water and the solvent was removed to obtain 161.3 g of light yellow viscous liquid with a yield of 89.6 wt%.

[0045] The str...

Embodiment 2

[0058] Add 153.3g of phosphorus oxychloride, 1.9g of anhydrous magnesium chloride and 600mL of butyl ether into a 3000mL four-necked flask equipped with a reflux condenser, thermometer, stirrer, and constant pressure dropping funnel, and cool the four-necked flask to -10°C And keep it for 20 minutes, slowly drop 130.2g of n-octanol under stirring, control the temperature of the system not to exceed 0°C, and react at -5~5°C for 3h. Raise the temperature to 25°C and react for 4h. Slowly add 118.2g butyl ether solution of hexanediol dropwise at 25°C, control the temperature of the system not to exceed 30°C, and react at 30°C for 3h, raise the temperature to 50°C, and react for 8h. 23.2 g of n-heptanol was added at 50° C., and refluxed for 6 hours. The reaction ended when the pH of the solution was close to neutral. The crude product was washed with water and the solvent was removed to obtain 257.0 g of light yellow viscous liquid with a yield of 87.7 wt%.

[0059] The structura...

Embodiment 3

[0064]Add 153.3g of phosphorus oxychloride, 7.9g of pyridine and 600mL of 2-pentanone into a 3000mL four-necked flask equipped with a reflux condenser, thermometer, stirrer, and constant pressure dropping funnel, cool the four-necked flask to -10°C and Maintain for 20 minutes, slowly drop 102.2 g of n-hexanol under stirring, control the temperature of the system not to exceed 0°C, and react at -5~5°C for 3 hours. Raise the temperature to 30°C and react for 4h. Slowly add 104.2 g of 1,5-pentanediol dropwise at 30°C, control the system temperature to about 30°C, and react for 4 hours; raise the temperature to 60°C, and react for 7 hours. 14.8 g of n-butanol was added at 60° C., and refluxed for 5 hours. The reaction ended when the pH value of the solution was close to neutral. The crude product was washed with water and the solvent was removed to obtain 222.3 g of a light yellow viscous liquid with a yield of 88.9 wt%.

[0065] The structural formula of the product obtained in...

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Abstract

The invention discloses a phosphate ester oligomer natural gas drag reducer and a synthetic method thereof. The molecular structural formula is as shown in the specification. The drag reducer is synthesized by the following method: dissolving phosphorus oxychloride and a catalyst in a solvent, and dropwise adding an alcohol R1OH solution to generate a phosphorus oxychloride monosubstitute; and raising the temperature, and dropwise adding diol HOR2OH to generate the phosphorus oxychloride oligomer; raising the temperature, and adding alcohol R3OH to obtain a crude product; and washing after thereaction is finished, and removing the solvent to obtain the product. The drag reducer provided by the invention has good adsorption performance and excellent drag reduction and transportation increase effects. The method is simple in synthesis process, mild in condition, short in reaction time, low in equipment requirement and easy to realize large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and in particular relates to a phosphate oligomer natural gas drag reducer and a synthesis method thereof. Background technique [0002] In recent years, my country's demand for natural gas has gradually increased, and some pipelines have reached full-load operation, and some areas have further increased pipeline capacity due to seasonal peak regulation requirements. For in-service pipelines, pressurization operation is the most direct and effective method to increase pipeline throughput, but the cost of pressurization transformation is high, the cycle is long, and the implementation is difficult. [0003] During pipeline transportation of natural gas, the roughness of the inner wall of the pipeline will generate frictional resistance, which in turn will generate gas vortices, resulting in pressure drop and energy loss along the way. Therefore, in order to increase the gas transmission volume, i...

Claims

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Application Information

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IPC IPC(8): C07F9/09C07F9/12F17D1/02C23F11/167
CPCC07F9/091C07F9/12F17D1/02C23F11/1673
Inventor 赵巍王晓司李世瀚王晓霖
Owner CHINA PETROLEUM & CHEM CORP
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