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Synthesis method and application of macrocyclic compound supramolecular scale dissolving material

A technology of macrocyclic compounds and synthesis methods, which is applied in the field of synthesis of macrocyclic compound supramolecular scale-dissolving materials, can solve the problems that are not suitable for large-scale oilfield descaling operations, and solve serious corrosion of equipment, increase the speed of scale dissolution, increase The effect of scale dissolution rate

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this antiscalant is mainly aimed at reverse osmosis membrane and nanofiltration membrane system, and is not suitable for large-scale oilfield descaling operations

Method used

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  • Synthesis method and application of macrocyclic compound supramolecular scale dissolving material
  • Synthesis method and application of macrocyclic compound supramolecular scale dissolving material
  • Synthesis method and application of macrocyclic compound supramolecular scale dissolving material

Examples

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preparation example Construction

[0036] A method for synthesizing macrocyclic supramolecular scaling materials, comprising the steps of:

[0037] (1) Preparation of supramolecular inclusion bodies

[0038] Add component A, component B, component C and water to the reaction vessel, wherein, the molar ratio of component A and component B is 1: (1-1.3), (component A+component B), component The mass ratio of C and water is (38-42):(4-6):(40-48), stir and heat up to (60~70)°C, react for (2-3)h, and obtain supramolecular inclusion body mixture;

[0039] Component A is a macrocyclic compound, including β-cyclodextrin, γ-cyclodextrin, 18-crown-6 ether, calix[6]arene and calix[8]arene;

[0040]Component B is selected from quaternary ammonium salt cationic surfactants and zwitterionic surfactants having 12-18 carbon atoms and containing hydrophobic tail chains.

[0041] Component C is selected from low molecular weight alcohols such as ethylene glycol, n-butanol and / or 1,2 propylene glycol;

[0042] The reaction pr...

Embodiment 1

[0055] A method for synthesizing macrocyclic supramolecular scaling materials, comprising the steps of:

[0056] (1) Preparation of supramolecular inclusion complexes

[0057] Add appropriate amount of β cyclodextrin, cetyl 3 methyl ammonium chloride, ethylene glycol and water into the three-necked flask, wherein, in terms of molar ratio, cyclodextrin: cetyl 3 methyl ammonium chloride =1:1.1, the mass ratio of reactant to ethylene glycol and water is (mass of β cyclodextrin+mass of hexadecyl 3 methyl ammonium chloride):ethylene glycol mass:water mass=40:5:45. Stir and heat up to 70°C, and react for 3 hours to obtain a mixture containing supramolecular inclusion bodies.

[0058]

[0059] (2) Compounding of supramolecular antifouling agent

[0060] Continue to add potassium chloride, tetrasodium edetate, dodecyl dimethyl benzyl ammonium chloride to the mixture containing supramolecular inclusion body, the mass ratio is the mixture containing supramolecular inclusion body:po...

Embodiment 2

[0062] A method for synthesizing macrocyclic supramolecular scaling materials, comprising the steps of:

[0063] (1) Preparation of supramolecular inclusion complexes

[0064] Add an appropriate amount of 18-crown (ether)-6, hexadecyl dimethyl betaine, and 1,2 propylene glycol and water into the three-necked flask, wherein the molar ratio of the reactants is 18-crown (ether)-6: Hexadecyl dimethyl betaine=1:1.1, the mass ratio of reactant to 1,2 propylene glycol and water is (18-crown (ether)-6 mass+hexadecyl dimethyl betaine): ethylene di Alcohol quality: water quality = 40:5:45. Stir and heat up to 65°C, and react for 2 hours to obtain a mixture containing supramolecular inclusion bodies.

[0065]

[0066] (2) Compounding of supramolecular antifouling agent

[0067] Continue to add sodium chloride, sodium gluconate, brominated 12 alkylpyridines in the mixture containing supramolecular inclusion body, mass ratio is the mixture containing supramolecular inclusion body: so...

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Abstract

The invention discloses a synthetic method of a macrocyclic compound supramolecular scale dissolving material. The synthetic method comprises the following steps: (1) preparing a supramolecular inclusion body; and (2) compounding a supramolecular anti-scaling agent. Supramolecules are formed based on inclusion bodies synthesized by subjects and objects, meanwhile, auxiliaries such as solubilizersand complexing agents are added to form the anti-scaling agent, the anti-scaling agent can be applied to the field of scale removal and prevention of oil and gas fields and other industries in the petroleum industry and is particularly suitable for barium and strontium scale prevention and treatment, the pH value of the supramolecular anti-scaling agent is about 9, environment friendliness is achieved, and anti-scaling efficiency and anti-scaling effect is improved.

Description

technical field [0001] The invention relates to the technical field of oil recovery and gas recovery engineering in the petroleum industry, in particular to a synthesis method and application of a macrocyclic compound supramolecular scale-dissolving material. Background technique [0002] As the oilfield development enters the middle and late stages, the water cut continues to rise, and a large amount of barium and strontium ions in the oilfield water tend to generate barium sulfate and strontium sulfate scales, which will cause scaling in the formation, wellbore, equipment and surface systems, thereby blocking oil and gas Pores and channels, resulting in reduced permeability, reduced oil and gas production, increased energy consumption and under-deposit corrosion, seriously affecting the normal production of oil fields, reducing production efficiency, and even scrapping water injection wells, especially barium strontium scale is insoluble in acid, and its texture is hard , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528B08B3/08B08B9/027B08B9/08
CPCC09K8/528B08B3/08B08B9/027B08B9/0804
Inventor 虞建业王彪吕红梅
Owner CHINA PETROLEUM & CHEM CORP
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