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Soybean lecithin modified emulsifier as well as preparation method and application thereof

A technology of soybean lecithin and soybean lecithin, which is applied in the field of petroleum drilling fluid, and achieves the effect of excellent electrical stability and high emulsification rate

Active Publication Date: 2022-06-21
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, soybean lecithin has not been reported as an emulsifier for oil-based drilling fluids

Method used

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  • Soybean lecithin modified emulsifier as well as preparation method and application thereof
  • Soybean lecithin modified emulsifier as well as preparation method and application thereof
  • Soybean lecithin modified emulsifier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 24 g of soybean lecithin and 2 g of ethylene glycol glycidyl ether were added to a double-necked round bottom flask with a reflux condenser, and 40 mL of ethanol was added. Under nitrogen protection, the temperature was slowly raised to 60 °C in an oil bath magnetic stirrer, and after stirring for 3 h, the solvent ethanol was distilled off under reduced pressure.

[0028] 6 g of diethylene glycol was added to the reaction system, 0.2 g of concentrated sulfuric acid was added dropwise, and under nitrogen protection, the reaction was stirred at 70° C. for 2 hours to obtain a soybean lecithin modified emulsifier.

Embodiment 2

[0030] 21 g of soybean lecithin and 3 g of diethylene glycol glycidyl ether were added to a double-necked round-bottomed flask with a reflux condenser, and 50 mL of ethanol was added. Under nitrogen protection, the temperature was slowly raised to 70 °C in an oil bath magnetic stirrer, and after stirring for 5 h, the solvent ethanol was distilled off under reduced pressure.

[0031] 6 g of diethylene glycol was added to the reaction system, and 0.5 g of phosphoric acid was added dropwise, and under nitrogen protection, the reaction was stirred at 90° C. for 3 hours to obtain a soybean lecithin modified emulsifier.

Embodiment 3

[0033] 25 g of soybean lecithin and 5 g of polyethylene glycol glycidyl ether were added to a double-necked round-bottomed flask with a reflux condenser, and 25 mL of isopropanol was added. Under nitrogen protection, the temperature was slowly raised to 80 °C in an oil bath magnetic stirrer, and after stirring for 6 h, the solvent isopropanol was distilled off under reduced pressure.

[0034] 6 g of diethylene glycol was added to the reaction system, 0.5 g of p-toluenesulfonic acid was added, and under nitrogen protection, the reaction was stirred at 100° C. for 1 h to obtain a soybean lecithin modified emulsifier.

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Abstract

The invention relates to a soybean lecithin modified emulsifier and a preparation method and application thereof in the technical field of petroleum drilling fluids, a plurality of hydrophilic alcohol ether groups are modified on an amino group of phosphorylethanolamine which accounts for the main component of soybean lecithin, the hydrophilicity is improved, other oleophylic components are not influenced, and the emulsifying effect is good. Therefore, the soybean lecithin has the effects of main milk and auxiliary milk, and an integrated emulsifier is formed. Comprising the following steps: heating and stirring a diepoxy compound and soybean lecithin in a lower alcohol solution to react, and distilling out a lower alcohol solvent; and adding polyol and protonic acid into the solution, heating and stirring to obtain the final soybean lecithin modified emulsifier. The soybean lecithin modified emulsifier prepared by the invention can be applied to emulsification of oil-based drilling fluids taking diesel oil, white oil and gas oil as base oil. The invention has the advantages of high emulsifying rate, excellent electrical stability, low dosage (2-5wt%) and wide applicable oil-water ratio range (6040-9010).

Description

technical field [0001] The invention relates to the field of petroleum drilling fluids, in particular to a soybean lecithin modified emulsifier and a preparation method and application thereof. Background technique [0002] With the continuous deepening of exploration and development, exploration and development objects have gradually shifted to deep and unconventional fields. Complex geological environment, environmental protection, and cost reduction and efficiency enhancement have put forward higher requirements for drilling fluids. Oil-based drilling fluids are widely used in water-sensitive formations, shale formations, deep wells, extremely thick salt gypsum formations, and salt rock formations due to their excellent properties such as strong inhibition, anti-pollution, lubrication, and reservoir protection. Emulsifier is one of the most critical treatment agents for oil-based drilling fluids. It is mainly used to ensure the emulsification stability of water-in-oil dri...

Claims

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Application Information

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IPC IPC(8): C07F9/10C09K8/035
CPCC07F9/10C09K8/035
Inventor 李公让王承俊赵红香李文博刘振东李蕾于雷杨倩云王浩然
Owner SINOPEC SSC
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