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Preparation method of polymerizable organic amine cation shale hydration inhibitor

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

Inactive Publication Date: 2016-05-04
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Preparation method of polymerizable organic amine cation shale hydration inhibitor
  • Preparation method of polymerizable organic amine cation shale hydration inhibitor
  • Preparation method of polymerizable organic amine cation shale hydration inhibitor

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: the preparation method of dodecyl dihydroxyethyl allyl ammonium bromide comprises the following steps:

[0036] S1. Formation of tertiary amine intermediate dodecyldiethanolamine: after dissolving diethanolamine in methanol, heat up to 75°C under nitrogen atmosphere, add bromododecane dropwise for reflux reaction for 45 hours, and bromidedeca The molar mass ratio of dioxane to diethanolamine is 1:1. After the reaction is completed, 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 Carry out extraction, ether layer is dried with anhydrous magnesium sulfate, vacuum distillation obtains tertiary amine intermediate dodecyldiethanolamine, the molar mass ratio of described diethanolamine and anhydrous sodium carbonate is 1:0.8, deionized water and anhydrous The volume ratio of water to ether is 1:1.2;

[0037] S2. Generation ...

Embodiment 2

[0038] Embodiment 2: the preparation method of dodecyl dihydroxyethyl allyl ammonium bromide comprises the following steps:

[0039] S1. Formation of tertiary amine intermediate dodecyldiethanolamine: after dissolving diethanolamine in ethanol, the temperature was raised to 80°C under a nitrogen atmosphere, and dodecyl bromide was added dropwise for reflux reaction for 48 hours. The decabromide The molar mass ratio of dioxane to diethanolamine is 1:3. After the reaction is completed, add anhydrous sodium carbonate to the reaction solution, continue the reaction for 5.5 hours, heat and distill the alcohol, and add deionized water and anhydrous ether to the crude product Carry out extraction, ether layer is dried with anhydrous magnesium sulfate, vacuum distillation obtains tertiary amine intermediate dodecyldiethanolamine, the molar mass ratio of described diethanolamine and anhydrous sodium carbonate is 1:1.2, deionized water and anhydrous The volume ratio of water to ether is...

Embodiment 3

[0041] Embodiment 3: the preparation method of dodecyl dihydroxyethyl allyl ammonium bromide comprises the following steps:

[0042]S1. Generation of tertiary amine intermediate dodecyldiethanolamine: after dissolving diethanolamine in isopropanol, heat up to 76°C under nitrogen atmosphere, add bromododecane dropwise for reflux reaction for 46h, the bromine The molar mass ratio of dodecane to diethanolamine is 1:1.8. After the reaction is completed, anhydrous sodium carbonate is added to the reaction solution, and the reaction is continued for 5 hours. The alcohol is evaporated by heating, and deionized water and anhydrous sodium carbonate are added to the crude product. Ether is extracted, and the ether layer is dried with anhydrous magnesium sulfate, and vacuum distillation obtains the tertiary amine intermediate dodecyldiethanolamine, and the molar mass ratio of the diethanolamine and anhydrous sodium carbonate is 1:1, deionized water and The volume ratio of anhydrous ether...

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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] Wellbore instability caused by shale hydration is a worldwide technical problem encountered in drilling engineering. When drilling in shale gas formations, oil-based drilling fluids and synthetic-based drilling fluids with strong inhibition are usually used. Due to environmental protection pressure and cost issues, the use of the two is still subject to certain restrictions. Therefore, the development of shale inhibitors with low cost and strong environmental acceptance has important research significance and application value. [0003] Judging from oilfield field application practice, it is beyond doubt that inhibitors containing a large number of hydroxyl groups and amine (ammonium) shale inhibitors have good shale inhibition effects. Coupled wi...

Claims

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Application Information

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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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