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Gas pipeline drag reduction agent and preparing method thereof

A technology for gas transmission pipeline and drag reducing agent, which is applied in the field of polymer compound composition and pipeline system, can solve the problems of limited drag reduction effect, etc., and achieve the effects of good drag reduction effect, mild reaction conditions and simple operation.

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 this patent proposes a method of applying drag reducers in gas pipelines and some substances of drag reducers, the drag reduction effects of these substances are limited, and they are not ideal drag reducers.

Method used

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  • Gas pipeline drag reduction agent and preparing method thereof
  • Gas pipeline drag reduction agent and preparing method thereof
  • Gas pipeline drag reduction agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The first step is to measure 18 parts of CS2, drop them into the mixture of 10 parts of hydrazine hydrate and water under stirring, reflux for a certain period of time in the temperature range of 90~95°C, then cool in an ice-water bath for a period of time, filter with suction, and continue to react the mother liquor The two and three products were combined, washed successively with ethanol and ether, and recrystallized with boiling water to obtain symmetrical dithiosemicarbazide;

[0022] In the second step, 10 parts of symmetrical dithiosemicarbazide and 10 parts of long-chain acid are dissolved in pyridine solvent, protected by nitrogen gas, and refluxed at 140°C to 220°C by temperature programming method, reacted for 3 to 4 hours, and cooled to At room temperature, the product was recrystallized.

Embodiment 2

[0024] The first step, measure 20 parts of CS2, drip in the mixed solution of 10 parts of hydrazine hydrate and water under stirring, synthesize under the same condition as in Example 1 to obtain symmetrical thiosemicarbazide; second step, mix 10 parts of Symmetrical dithiosemicarbazide and 10 parts of long-chain acid are dissolved in pyridine solvent, protected by nitrogen, refluxed at 140°C-220°C by temperature programming method, reacted for 3-4 hours, cooled to room temperature, and recrystallized to obtain the product.

Embodiment 3

[0026] The first step, measure 22 parts of CS2, drip in the mixed solution of 10 parts of hydrazine hydrate and water under stirring, synthesize under the same condition as in Example 1 to obtain symmetrical thiosemicarbazide; second step, mix 10 parts of Symmetrical dithiosemicarbazide and 10 parts of long-chain acid are dissolved in pyridine solvent, protected by nitrogen, refluxed at 140°C-220°C by temperature programming method, reacted for 3-4 hours, cooled to room temperature, and recrystallized to obtain the product.

[0027] The product of above-mentioned embodiment is done infrared spectroscopic test, and result is as follows: figure 1 , figure 2 shown.

[0028] The absorption of the group, the spectrum of the compound where the C=S group is connected to the nitrogen atom has an absorption peak in the general C=S stretching vibration range, in addition, at 1563 ~ 700cm -1 In the broad region of , several absorption peaks can be attributed to vibrations involving ...

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PUM

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Abstract

The invention relates to a gas line drag reduction agent and a preparation method thereof, relating to the technical field of the composite of high-molecular compound and piping systems. The drag reduction agent consists of carbon bisulfide, hydrazine hydrate and long chain acid, the mol ratio of which is 1.8:1:1 to 2.2:1:1. The preparation method comprises the following steps: step one, CS2 is taken according to proportional quantity, dripped into the mixed liquor of the hydrazine hydrate and water with proportional quantity under agitation, reflowed for certain time in the temperature range of 90 to 95 DEG C, then cooled for 30 to 60 minutes in ice water bath and pumped and filtered, the mother liquor continues to react for two times, products of the third time are merged, washed by using ethanol and ether sequentially, and recrystallized by using boiling water so as to obtain symmetrical diaminothiourea clear crystal; and step two, symmetrical diaminothiourea with proportional quantity and the long chain acid with proportional quantity are dissolved in a pyridine solvent with nitrogen protection, reflowed at the temperature of 140 to 220 DEG C by adopting a temperature programming method, and react for 3 to 4 hours, then the mixture is cooled to the room temperature and recrystallizated by using the ethanol of 95 percent to obtain the brown product.

Description

technical field [0001] The invention relates to a gas transmission pipeline drag reducer 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): F17D1/02
Inventor 刘兵李国平李春漫徐海红鲍旭晨
Owner PIPECHINA SOUTH CHINA CO
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