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Temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer and preparation method thereof

A technology of emulsification and viscosity reduction, temperature and salt resistance, applied in the field of viscosity reducers, to achieve the effect of clean process, no pollution, strong emulsifying and dispersing ability, and good salt resistance.

Active Publication Date: 2020-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems encountered in domestic heavy oil exploitation at present, the present invention proposes a temperature-resistant and salt-resistant heavy oil emulsifying viscosity reducer and its preparation method. Strong and high viscosity reduction rate and other advantages

Method used

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  • Temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer and preparation method thereof
  • Temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer and preparation method thereof
  • Temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ①Add 244g of 1,6-dibromohexane and 186.2g of aniline to a three-necked flask equipped with a reflux condenser, and then add 244g of solvent absolute ethanol; heat up to 40°C, stir for 10min at a stirring rate of 200rpm, and wait for After complete dissolution, pour in condensed water, rapidly raise the temperature to 80°C under constant stirring rate, and reflux for 24 hours; after the reaction is completed, cool to room temperature to obtain the intermediate mixture;

[0033] ② Suction filter the above intermediate mixture to obtain a brown powder, wash twice with petroleum ether, and dry the obtained solid in a vacuum oven for 20 hours to obtain the intermediate N,N'-diphenylhexamethylenediamine;

[0034] ③ Put the above-mentioned intermediate N,N'-diphenylhexamethylenediamine into the three-necked flask again, then add 244g of solvent dimethyl sulfoxide and 24.4g of sodium hydroxide to the three-necked flask in turn, keep the temperature at 25°C, and stir The speed i...

Embodiment 2

[0039] ① Add 244g of 1,6-dibromohexane and 195.51g of aniline to a three-necked flask equipped with a reflux condenser, and then add 350g of absolute ethanol as a solvent; heat up to 50°C, stir for 20min at a stirring rate of 300rpm, and wait for After complete dissolution, pour in condensed water, rapidly raise the temperature to 83°C under constant stirring rate, and reflux for 28 hours; after the reaction is completed, cool to room temperature to obtain an intermediate mixture;

[0040] ② Suction filter the above intermediate mixture to obtain a brown powder, wash with petroleum ether for 3 times, and dry the obtained solid in a vacuum oven for 25 hours to obtain the intermediate N,N'-diphenylhexamethylenediamine;

[0041] ③ Place the above-mentioned intermediate N,N'-diphenylhexamethylenediamine into the three-necked flask again, then add 732g of solvent dimethyl sulfoxide and 48.8g of sodium hydroxide to the three-necked flask in turn, keep the temperature at 22°C, and sti...

Embodiment 3

[0046] ① Add 244g of 1,6-dibromohexane and 204.82g of aniline to a three-necked flask equipped with a reflux condenser, and then add 488g of absolute ethanol as a solvent; heat up to 55°C, stir at a stirring rate of 400rpm for 16min, and wait for After complete dissolution, pour in condensed water, rapidly raise the temperature to 85°C with constant stirring rate, and reflux for 36 hours; after the reaction is completed, cool to room temperature to obtain an intermediate mixture;

[0047] ② Suction filter the above intermediate mixture to obtain a brown powder, wash with petroleum ether 4 times, and dry the obtained solid in a vacuum oven for 40 hours to obtain the intermediate N, N'-diphenylhexamethylenediamine;

[0048] ③ Place the above-mentioned intermediate N,N'-diphenylhexamethylenediamine into the three-necked flask again, then add 500g of solvent dimethyl sulfoxide and 73.2g of sodium hydroxide to the three-necked flask in turn, keep the temperature at 25°C, and stir T...

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Abstract

The invention discloses a temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer and a preparation method thereof, wherein the molecular formula of the emulsifying viscosity reducer is defined in the specification, and n is a natural number and is more than or equal to 10 and less than or equal to 16. According to the invention, the emulsifying viscosity reducer has characteristics of simple synthesis process, small dosage, low cost and remarkable economic benefit, further has advantages of remarkable temperature resistance, strong salt resistance, strong emulsifying anddispersing capacity and high viscosity reduction rate, and can resist a temperature of more than 120 DEG C, resist calcium and magnesium ion concentration of 10000 mg / L and resist the total ion concentration of 200000 mg / L; the viscosity of heavy oil at 50 DEG C can be reduced by more than 95.0% at a dosage of 100 ppm; and the temperature-resistant salt-resistant heavy oil emulsifying viscosity reducer can be widely applied to on-site high-temperature and high-salt heavy oil recovery and transportation.

Description

technical field [0001] The invention relates to a viscosity reducer used in the crude oil exploitation process, in particular to a temperature-resistant and salt-resistant heavy oil emulsification viscosity reducer and a preparation method thereof. Background technique [0002] Heavy oil generally has high viscosity, high density, and high content of colloids and asphaltenes. my country's heavy oil has the characteristics of low asphaltene content, high colloid content, low metal content, high viscosity and low relative density. According to the viscosity and relative density, it can be divided into ordinary heavy oil, extra heavy oil and super heavy oil. [0003] Saturates, aromatics, colloids, and asphaltenes constitute the four components that define the family composition of crude oils. The mass percentage of the four components in crude oil reflects the chemical composition of crude oil, which is closely related to its fluidity. Low saturated hydrocarbon content and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C209/10C07C211/48
CPCC09K8/584C07C209/10C07C211/48
Inventor 钱钦郑万刚张学超于田田盖平原何海峰何旭马爱青林吉生何绍群
Owner CHINA PETROLEUM & CHEM CORP
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