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Gas pipeline anti-drag composition and preparation thereof

A gas pipeline and composition technology, applied in the field of polymer compound composition and pipeline system, can solve the problem of limited drag reduction effect, achieve the effect of low equipment requirements, simple process, and large-scale industrial production

Active Publication Date: 2008-12-24
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the patent mentioned the method of applying drag reducer in gas pipelines and mentioned some drag reducer substances, the drag reduction effect of these substances is limited, and they are not ideal drag reducers.

Method used

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  • Gas pipeline anti-drag composition and preparation thereof
  • Gas pipeline anti-drag composition and preparation thereof
  • Gas pipeline anti-drag composition and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1. This example is a test method in a laboratory. Add 10 parts of hexadecanoic acid and half-and-half mixture of octadecanoic acid into a four-neck flask, heat and melt, inject 10 parts of vinylamine, protect with nitrogen, preheat to 150°C, reflux, liquid separation, water separation The container is divided into upper and lower layers, and the water layer is removed. Then the temperature was programmed slowly, from 150°C to 230°C within 3 hours. Then remove the stirrer, connect the vacuum pump, vacuumize for 2 hours, and the vacuum degree is 20mmHg. Finally, heat azeotrope until the water formed in the reaction is removed.

Embodiment 2

[0027] Example 2. Add 10 parts of long-chain acid into a four-neck flask, heat and melt, inject 13 parts of enamine, protect with nitrogen, slowly heat up to reflux, and separate liquids. The temperature was then programmed slowly to 230°C within 4 hours. Then withdraw the stirrer, connect the vacuum pump, and vacuumize for 2 hours. The vacuum degree is 20mmHg.

Embodiment 3

[0028] Example 3. Add 10 parts of long-chain acid into a four-neck flask, heat and melt, inject 15 parts of enamine, protect with nitrogen, slowly heat up to reflux, and separate liquids. The temperature was then slowly programmed to 230°C within 3 hours. Then withdraw the stirrer, connect the vacuum pump, and vacuumize for 3 hours. The vacuum degree is 18mmHg.

[0029] The drag-reducing composition that above-mentioned three examples make, through infrared spectroscopic analysis, in figure 2 Among them, the infrared characteristic peak of the raw material long-chain acid mixture is at 1695.6cm -1 This is the C=O stretching vibration absorption peak in R-COOH, and this peak disappears in the synthesized product, indicating that all long-chain acids have participated in the reaction; figure 1 In the infrared spectrum of the synthesized product, 1601cm -1 The absorption peak at is the characteristic absorption peak of C=N, indicating that the long-chain acid amine forms a r...

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Abstract

The invention relates to a gas pipeline drag reduction composition used in gas and particularly natural gas conveying pipeline drag reduction and a preparation method thereof, relating to a macromolecular compound composition and the pipeline system technical field. The composition is characterized in that: the composition consists of a long-chain acid mixture and enamine according to a molar ratio of between 1:1 and 1.5:1. The preparation method comprises the following steps that: after the long chain acid is added in a reactor and is heated to melting, the enamine is added and nitrogen is fed in to carry out protection and preheating; then, reflux and liquid separation are carried out; a method combining a programmed heating-up method, a vacuum method and an azeotropic agent is adopted to carry out reaction; and finally, when the reaction is finished, a product can be obtained after cooling down. The gas pipeline drag reduction composition has obvious drag reduction effect on gas pipelines, direct source of raw materials, simple operation, moderate reaction conditions, relatively simple process and low requirements on equipment, and is easy to realize large-scale industrialized production.

Description

technical field [0001] The invention relates to a gas pipeline drag-reducing composition for drag reduction of gas, especially natural gas pipelines, and a preparation method thereof. It relates to the technical field of polymer compound composition and pipeline system. Background technique [0002] The utilization of natural gas energy is one of the important development directions at home and abroad. Due to the global requirements for sustainable economic development and the call for "clean energy", the demand for natural gas is increasing day by day. [0003] At present, the main transportation mode of natural gas is pipeline transportation. Gas pipelines in the modern sense have a history of nearly 120 years. As the gas flows through the pipe, the roughness causes friction which in turn creates a gas vortex, causing energy loss and thus pressure loss in the pipe. For natural gas pipeline transportation in a state of turbulent flow, the pipe wall roughness has the gre...

Claims

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Application Information

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IPC IPC(8): C10M107/00F17D1/02C10N50/02
Inventor 李国平徐海红刘兵李春漫鲍旭晨
Owner PIPECHINA SOUTH CHINA CO
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