Pyridine saline gas transmission pipeline drag reduction agent and preparation method thereof

A technology of gas transmission pipelines and drag reducers, applied in pipeline systems, chemical instruments and methods, mechanical equipment, etc., can solve problems such as energy loss and pipeline pressure loss, and achieve low equipment requirements, mild reaction conditions, and direct raw material sources Effect

Active Publication Date: 2009-11-11
PIPECHINA SOUTH CHINA CO
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  • Description
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AI Technical Summary

Problems solved by technology

When the gas flows through the pipe, the roughness will cause friction and then gene

Method used

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[0032] Example. This example is used to illustrate the specific implementation of the present invention and further illustrate the present invention. This example is a test method in a laboratory. Specifically, 250ml of 2-chloropyridine and 350ml of n-hexane bromide were added to a 500ml three-necked flask, and under the stirring condition of an inert atmosphere, the reaction temperature was first controlled to be 70°C, and after stabilizing for 2h, the reaction temperature was slowly raised to 80°C, Continue to reflux for 80h and stop heating. The reaction mixture was cooled for 2h, the upper layer was slightly yellow liquid, and the lower layer was white crystals. Under an inert atmosphere, the yellow liquid in the upper layer was removed, and the white crystals were crushed for suction filtration. Put the white crystals into a thermal purifier, add a solvent, heat at 80°C, and reflux for 2 hours to completely dissolve the white crystals. Perform hot filtration in a therm...

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Abstract

The invention discloses a pyridine saline gas transmission pipeline drag reduction agent and a preparation method thereof. The pyridine saline gas transmission pipeline drag reduction agent is prepared from pyridines compounds, fluo phosphate, and halogenated hydrocarbon according to the mol ratio of 1:1:1-1.5:2:1. The preparation method comprises the following steps: adding the pyridines compounds and the halogenated hydrocarbon of the proportional quantities into a reaction vessel, and under the condition of stirring the mixture in the inert atmosphere, controlling the reaction temperature and reflux for reaction; after the reaction is finished, stopping heating, and cooling the reaction mixture, wherein the upper layer of the reaction mixture is yellowish liquid, and the lower layer of the reaction mixture is a white crystal; in the inert atmosphere, pouring out the yellowish liquid on the upper layer, and crashing the white crystal for suction filtration; putting the white crystal into a heat insulating purifier, adding a solvent into the heat insulating purifier, and in the inert atmosphere, re-crystallizing the mixture for 2-3 times to obtain a white crystal; adding an organic solvent, the white crystal and the fluo phosphate in a certain proportion into the reaction vessel, stirring the mixture in the inert atmosphere, and controlling the temperature for reaction; after the reaction is finished, carrying out suction filtration on the liquid rapidly, and removing undissolved substances to obtain a crude product containing the solvent; and steaming a small amount of the organic solvent from the crude product by a rotary evaporator, then putting the crude product in a vacuum oven to make the organic solvent steamed radically, and obtaining a product.

Description

technical field [0001] The invention relates to a pyridine salt gas pipeline drag reducer for drag reduction of long-distance gas pipelines, especially natural gas pipelines, and a preparation method thereof. It relates to the technical field of organic macromolecular compounds, their preparation and pipeline system. Background technique [0002] Natural gas is the least polluting and cleanest energy source, so its proportion in primary energy has increased rapidly, and the natural gas pipeline network has developed rapidly. The demand for natural gas varies greatly in various regions at home and abroad, even in different seasons, which requires the gas transmission network to have certain adjustment capabilities, especially to increase the transmission volume rapidly under the condition of ensuring safety. Therefore, it is urgent to develop a natural gas drag reducer similar to oil drag reducer, so as to make a breakthrough in the drag reduction technology of natural gas p...

Claims

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Application Information

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IPC IPC(8): C09K3/00F17D1/02
Inventor 张志恒李国平艾慕阳常维纯刘兵徐海红
Owner PIPECHINA SOUTH CHINA CO
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