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A kind of synthetic method of macrocyclic compound supramolecular scale dissolving material and its application

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 achieve serious equipment corrosion, increase scale dissolution rate, and improve Effect of scaling speed

Active Publication Date: 2022-06-24
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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  • A kind of synthetic method of macrocyclic compound supramolecular scale dissolving material and its application
  • A kind of synthetic method of macrocyclic compound supramolecular scale dissolving material and its application
  • A kind of synthetic method of macrocyclic compound supramolecular scale dissolving material and its application

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preparation example Construction

[0036] A method for synthesizing a macrocyclic compound supramolecular scale-dissolving material, comprising the steps of:

[0037] (1) Preparation of supramolecular inclusion complexes

[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), and the temperature is raised to (60-70) °C with stirring, and the reaction is (2-3) h to obtain a supramolecular inclusion complex. 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 a hydrophobic tail.

[0041] Component C is selected from low molecular weight alcohols such as ethylene glycol, n-buta...

Embodiment 1

[0055] A method for synthesizing a macrocyclic compound supramolecular scale-dissolving material, comprising the steps of:

[0056] (1) Preparation of supramolecular inclusion complexes

[0057] Add an appropriate amount of β-cyclodextrin, cetyl 3 methyl ammonium chloride, ethylene glycol and water to the three-necked flask, wherein, in molar ratio, cyclodextrin: cetyl 3 methyl ammonium chloride =1:1.1, the mass ratio of reactant to ethylene glycol and water is (beta cyclodextrin mass+hexadecyl 3 methyl ammonium chloride mass): ethylene glycol mass: water mass=40:5:45. The temperature was raised to 70 °C with stirring, and the reaction was carried out for 3 h to obtain a mixture containing supramolecular inclusions.

[0058]

[0059] (2) Compounding of supramolecular scale inhibitors

[0060] Continue to add potassium chloride, tetrasodium EDTA, dodecyldimethylbenzyl ammonium chloride to the mixture containing supramolecular inclusions, and the mass ratio is the mixture c...

Embodiment 2

[0062] A method for synthesizing a macrocyclic compound supramolecular scale-dissolving material, comprising the steps of:

[0063] (1) Preparation of supramolecular inclusion complexes

[0064] In the three-necked flask, add an appropriate amount of 18-crown (ether)-6, hexadecyldimethyl betaine, and 1,2 propylene glycol and water, wherein the reactant molar ratio is 18-crown (ether)-6: Cetyl 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 mass: water mass = 40:5:45. The temperature was raised to 65 °C with stirring, and the reaction was carried out for 2 h to obtain a mixture containing supramolecular inclusions.

[0065]

[0066] (2) Compounding of supramolecular scale inhibitors

[0067] Continue to add sodium chloride, sodium gluconate, 12 alkyl bromide to the mixture containing supramolecular inclusions, and the mass ratio is the mixture containing supra...

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Abstract

The invention discloses a method for synthesizing a supramolecular scaling material of a macrocyclic compound, which comprises the following steps: (1) preparation of a supramolecular inclusion body; (2) compounding of a supramolecular antiscaling agent. The present invention forms a supermolecule based on the inclusion body synthesized by host and guest, and at the same time adds solubilizers, complexing agents and other additives to form an anti-scaling agent, which can be applied to oil and gas fields in the petroleum industry and other industrial anti-scaling fields, especially for barium strontium Scale prevention and control, the supramolecular antiscaling agent has a pH value of about 9, is environmentally friendly, and improves the efficiency and effect of antiscaling.

Description

technical field [0001] The invention relates to the technical field of oil and gas production engineering in the petroleum industry, in particular to a method for synthesizing a macrocyclic compound supramolecular scale-dissolving material and its application. Background technique [0002] As the oilfield development enters the middle and late stages, the water content continues to rise, and a large amount of barium and strontium ions in the oilfield water are prone to form barium sulfate and strontium sulfate scale, 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-scale corrosion, seriously affecting the normal production of oil fields, reducing production efficiency, and even scrapping water injection wells, especially barium and strontium scale is insoluble in acid, and its texture is ...

Claims

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Application Information

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Patent Type & Authority Patents(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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