Hyperbranched amide hydrate kinetic inhibitor as well as preparation method and application thereof

A kinetic inhibitor, hydrate technology, applied in chemical instruments and methods, drilling compositions, mechanical equipment, etc., can solve problems such as limited practical use scenarios, achieve a wide range of use and conditions, and high yield , Environmentally friendly effect

Inactive Publication Date: 2020-06-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conditions of use in this scheme are that all parts are valid, and the actual use scenarios are limited, which does not solve the problem in essence

Method used

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  • Hyperbranched amide hydrate kinetic inhibitor as well as preparation method and application thereof
  • Hyperbranched amide hydrate kinetic inhibitor as well as preparation method and application thereof
  • Hyperbranched amide hydrate kinetic inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for a hyperbranched amide hydrate kinetic inhibitor, specifically comprising the following steps:

[0032] (1) Take 10.156g of aspartic acid and 42.1g of KBr into a three-necked flask, then connect the three ports of the flask with a thermometer, a condenser tube, and a rubber hole plug, and the upper end of the condenser tube is connected to the gas path. After evacuating, pass nitrogen gas to initially remove the air in the pipeline. Slowly add 25.8mL of concentrated sulfuric acid into 200mL of distilled water under ice bath conditions, transfer to the flask after cooling. 9.57gNaNO 2 Add 20mL of distilled water, add drop by drop from the rubber stopper hole to the flask with a syringe at low temperature, seal it, stop the reaction after 2h, extract the product with ethyl acetate, and then use anhydrous MgSO 4 Drying is carried out to obtain 2-bromosuccinic acid;

[0033](2) Under a nitrogen atmosphere, add 10.64g of 2-bromosuccinic acid, 30g o...

Embodiment 2

[0037] Same as Example 1, the difference is:

[0038] In step (1), aspartic acid and KBr mass ratio are 1:3, and the total mass of aspartic acid and KBr and NaNO 2 The mass ratio of NaNO is 4:1; 2 The mass ratio of distilled water to distilled water is 1:20, the mass ratio of distilled water to concentrated sulfuric acid is 10:1, and the reaction time is 3 hours.

[0039] In step (2), the mass ratio of 2-bromosuccinic acid and propynyl alcohol is 1:2, the mass ratio of the total mass of 2-bromosuccinic acid and propynyl alcohol and p-toluenesulfonic acid is 50:1 , the mass ratio of p-toluenesulfonic acid and benzene is 1:100, the reaction temperature is 80 ℃, and the reaction time is 48 hours; the volume ratio of ethyl acetate and the NaOH solution of 10wt% in the mixed solution is 4:1, The first rotary evaporation temperature is 40°C, and the second rotary evaporation temperature is 35°C.

[0040] In step (3), 2-bromopropynyl succinate and vinyl caprolactam mass ratio are ...

Embodiment 3

[0042] Same as Example 1, the difference is:

[0043] In step (1), aspartic acid and KBr mass ratio are 1:5, and the total mass of aspartic acid and KBr and NaNO 2 The mass ratio of NaNO is 5:1; 2 The mass ratio of distilled water to distilled water is 1:40, the mass ratio of distilled water to concentrated sulfuric acid is 30:1, and the reaction time is 4 hours.

[0044] In step (2), the mass ratio of 2-bromosuccinic acid and propynyl alcohol is 1:4, the mass ratio of the total mass of 2-bromosuccinic acid and propynyl alcohol and p-toluenesulfonic acid is 70:1 , the mass ratio of p-toluenesulfonic acid and benzene is 1:150, the reaction temperature is 90 DEG C, and the reaction time is 36 hours; the volume ratio of ethyl acetate and the mass fraction of 10wt% NaOH solution in the mixed solution is 5:1, The first rotary evaporation temperature is 55°C, and the second rotary evaporation temperature is 45°C.

[0045] In step (3), the mass ratio of propynyl 2-bromosuccinate a...

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PUM

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Abstract

The invention provides a hyperbranched amide hydrate kinetic inhibitor as well as a preparation method and application thereof. The structural formula of the hyperbranched amide hydrate kinetic inhibitor is represented by a formula (1), wherein the weight-average molecular weight of the hyperbranched amide hydrate kinetic inhibitor is 10000-40000, and the molecular weight distribution coefficientis 1-3. The hydrate kinetic inhibitor has the advantages of being good in solubility and small in dosage and can be applied to an oil-gas-water system, and the preparation method of the hydrate kinetic inhibitor is simple in production process and controllable in production process.

Description

Technical field: [0001] The invention relates to the technical field of hydrate inhibitors, in particular to a hyperbranched amide copolymer hydrate kinetics inhibitor and its preparation technology and application. Background technique: [0002] Natural gas hydrate is an ice-like clathrate crystalline compound formed by water and natural gas under high pressure and low temperature conditions. Due to the limitation of conditions during the transportation of natural gas, it will quickly block the pipeline after formation. In order to prevent its formation, the main method currently used is to add gas hydrate inhibitors. However, currently commonly used thermodynamic inhibitors such as ethylene glycol are not effective at low concentrations, and at the same time, they are used in large amounts and are not friendly to the environment. [0003] Therefore, to address this issue, kinetic inhibitors have come into focus. The dosage of kinetic inhibitors is low, the effect is good...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F238/00C09K8/52F17D1/17
CPCC08F226/06C09K8/52C09K2208/22F17D1/17C08F238/00
Inventor 龙臻路智林梁德青
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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