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A kind of preparation method of polymerizable organic amine cationic hydration shale inhibitor

A hydration inhibitor and cation technology, applied in the field of preparation of organic compounds, can solve the problems of large odor, insignificant effect, easy degradation, etc., and achieve the effects of mild reaction conditions, good inhibition effect and good thermal stability.

Inactive Publication Date: 2018-01-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they all have the disadvantages of strong odor, easy degradation, and ineffective effects.

Method used

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  • A kind of preparation method of polymerizable organic amine cationic hydration shale inhibitor
  • A kind of preparation method of polymerizable organic amine cationic hydration shale inhibitor
  • A kind of preparation method of polymerizable organic amine cationic hydration shale inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The preparation method of dodecyl dihydroxyethyl allyl ammonium bromide includes the following steps:

[0036] S1. Formation of tertiary amine intermediate dodecyldiethanolamine: After diethanolamine is dissolved in methanol, the temperature is raised to 75°C under a nitrogen atmosphere, and bromododecane is added dropwise to reflux reaction for 45h. The molar mass ratio of dioxane to diethanolamine is 1:1. After the reaction is over, add anhydrous sodium carbonate to the reaction solution, continue the reaction for 4.5 hours, heat to distill the alcohol, and add deionized water and anhydrous ether to the crude product After extraction, the ether layer was dried with anhydrous magnesium sulfate and distilled under reduced pressure to obtain the tertiary amine intermediate dodecyl diethanolamine. The molar mass ratio of the diethanolamine to anhydrous sodium carbonate was 1:0.8, deionized water and The volume ratio of water to ether is 1:1.2;

[0037] S2. The form...

Embodiment 2

[0038] Example 2: The preparation method of dodecyl dihydroxyethyl allyl ammonium bromide includes the following steps:

[0039] S1. Formation of tertiary amine intermediate dodecyl diethanolamine: After diethanolamine is dissolved in ethanol, the temperature is raised to 80°C under a nitrogen atmosphere, and bromododecane is added dropwise for reflux reaction for 48 hours. The molar mass ratio of dioxane to diethanolamine is 1:3. After the reaction is over, add anhydrous sodium carbonate to the reaction solution, continue the reaction for 5.5h, heat to distill the alcohol, and add deionized water and anhydrous ether to the crude product For extraction, the ether layer was dried with anhydrous magnesium sulfate and distilled under reduced pressure to obtain the tertiary amine intermediate dodecyl diethanolamine. The molar mass ratio of the diethanolamine to anhydrous sodium carbonate was 1:1.2, deionized water and The volume ratio of water to ether is 1:1.8;

[0040] S2. The forma...

Embodiment 3

[0041] Example 3: The preparation method of dodecyl dihydroxyethyl allyl ammonium bromide includes the following steps:

[0042] S1. Formation of tertiary amine intermediate dodecyldiethanolamine: After diethanolamine is dissolved in isopropanol, the temperature is raised to 76°C under a nitrogen atmosphere, and bromododecane is added dropwise to reflux for 46h. The bromine The molar mass ratio of dodecane and diethanolamine is 1:1.8. After the reaction is over, add anhydrous sodium carbonate to the reaction solution, continue the reaction for 5 hours, heat to distill the alcohol, and add deionized water and anhydrous to the crude product Ether was extracted, the ether layer was dried with anhydrous magnesium sulfate and distilled under reduced pressure to obtain the tertiary amine intermediate dodecyl diethanolamine, the molar mass ratio of the diethanolamine to anhydrous sodium carbonate was 1:1, deionized water and The volume ratio of anhydrous ether is 1:1.4;

[0043] S2. The ...

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Abstract

The invention discloses a preparation method of a polymerizable organic amine cation shale hydration inhibitor. The polymerizable organic amine cation shale hydration inhibitor is dodecyl-dihydroxyethyl allyl ammonium bromide. The synthetic route of the polymerizable organic amine cation shale hydration inhibitor includes the steps that bromododecane and diethanolamine are reacted to obtain a tertiary amine intermediate dodecyl diethanolamine, and the tertiary amine intermediate dodecyl diethanolamine and bromopropylene are reacted to obtain the target product. The inhibitor is good in thermal stability and good in inhibitory effect in fresh-water-based slurry, is soluble in water and capable of being directly applied to water-based drilling fluid, and can be polymerized with other unsaturated compounds as organic synthesis monomers to generate water-soluble cationic polymers; besides, preparation raw materials are cheap and easy to obtain, reaction conditions are mild, hydration and dispersion of shale can be effectively prevented, control is easy, and the preparation method can be applied to large-scale industrial production.

Description

Technical field [0001] The invention relates to a preparation method of an organic compound, in particular to a preparation method of a polymerizable organic amine cationic shale hydration inhibitor. Background technique [0002] The instability of the borehole wall caused by shale hydration is a worldwide technical problem encountered in drilling engineering. When drilling into shale gas formations, oil-based drilling fluids and synthetic-based drilling fluids with strong inhibition are usually used. Subject to environmental pressure and cost issues, the use of both is still subject to certain restrictions. Therefore, the development of low-cost, environmentally acceptable shale inhibitors has important research significance and application value. [0003] From the field application practice in oilfields, it is beyond doubt that inhibitors containing a large amount of hydroxyl and amine (ammonium) shale inhibitors have good shale inhibition effects. Coupled with the successful a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C213/04C07C215/40C07C215/12C09K8/035
CPCC07C213/04C09K8/035C09K2208/12C07C215/40C07C215/12
Inventor 蒲晓林都伟超孙金声
Owner SOUTHWEST PETROLEUM UNIV
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