CN101328441A - Gas pipeline drag reducer and preparation thereof - Google Patents
Gas pipeline drag reducer and preparation thereof Download PDFInfo
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- CN101328441A CN101328441A CNA2007101190997A CN200710119099A CN101328441A CN 101328441 A CN101328441 A CN 101328441A CN A2007101190997 A CNA2007101190997 A CN A2007101190997A CN 200710119099 A CN200710119099 A CN 200710119099A CN 101328441 A CN101328441 A CN 101328441A
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Abstract
The invention relates to a gas pipeline drag reducer 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 gas pipeline drag reducer is characterized in that: the drag reducer is synthesized by long-chain acid and enamine according to a molar ratio of between 1:1 and 2.2:1. The preparation method comprises the following steps that: the long chain acid in proportional quantity is added in a reaction container; a heater is started so as to carry out heating while stirring; when temperature reaches to 100 DEG C, the long chain acid is melted, and the enamine in proportional quantity is added at the same time; nitrogen is fed in to carry out protection, and the mixture is preheated to between 120 and 140 DEG C; after preheating is finished, programmed heating is carried out till the temperature reaches between 210 and 220 DEG C; a stirrer is removed and a vacuum pump is connected to carry out evacuation for 2 to 4 hours; when reaction is finished, brown solid crude product can be obtained after cooling down. The gas pipeline drag reducer 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
The present invention is particularly a kind of gas pipeline drag reducer and preparation method thereof of natural-gas transfer pipeline drag reduction of gas.The composition and the tubing system technical field that relate to macromolecular compound.
Background technology
The utilization of natural gas energy resource is one of important directions that develops both at home and abroad at present.Because the whole world is to the requirement of sustainable economic development with to the call of " clear energy sources ", the demand of Sweet natural gas grows with each passing day.
At present, the main mode of transport of Sweet natural gas is a pipe-line transportation.Gas pipe line on the Modern Significance has nearly 120 years developing history.When gas stream during through pipeline, roughness can cause friction and then produce air whirl, cause power loss, thereby cause the pressure-losses of pipeline.The natural gas line that is in turbulent state is carried, and the tube wall roughness has the greatest impact to frictional coefficient, increase throughput rate and must reduce the tube wall roughness.In recent years, natural gas line carries Research of Drag Reduction to obtain bigger progress, and with regard to present result of study, drag reduction method roughly can reduce: natural gas line undercoat drag reduction technology and flow improver drag reduction technology.
As everyone knows, the same with drag reducer for crude oil, the application of Sweet natural gas flow improver can significantly increase the power consumption of throughput rate, reduction compressor, the installation power of minimizing compressor, save compressed station number, the economic benefit of being brought is huge, and good needs of production and market outlook are arranged.But the Sweet natural gas flow improver is different from commercial liquid (as oil) flow improver.A kind of liquid drag reducer, the flow improver that for example is used in the TransAlaska crude oil pipeline is typical long chain polymer, the liquid phase that circulates this polymkeric substance reduces the eddy current in the liquid, its molecular weight is 1,000,000 orders of magnitude, and liquid drag reducer is extended to the center turbulent area to laminar sub-layer from inner surface of pipeline.Its service area at laminar flow and turbulent at the interface.And the molecular weight of Sweet natural gas flow improver can not be very big, because this considers its atomizing ability and and its " filling " ability of " trench " on tube wall.And the zone of action of Sweet natural gas flow improver is not at laminar flow and turbulent at the interface, it is to directly act on inner surface of pipeline, the turbulence that flow improver molecule and metallic surface are combined together to form securely is one smooth, flexible surface relaxes the gas-solid interface place, reduce the friction between fluid and the tube wall, promptly directly reduce the inner surface of pipeline roughness, thereby reach the drag reduction effect, it does not change fluidic character.In the US5020561 patent, proposed in gas pipeline, to use the method for flow improver drag reduction, this flow improver is the material that is similar to inhibiter, lubricant and so on, for example: carbonatoms be in the lipid acid between 18～54, oxyalkylated fatty acid amine and or acid amides, the molecular weight of its long chain hydrocarbon approximately from 300 to 900.The condition that some natural crude oil also meets flow improver is also proposed in this invention, this natural crude oil is by bituminous matter, resin and long chain alkane (C1 ~ C40) form, also contain minor N, S, O, Fe and V, these heteroatomss concentrate on the macromolecule part mostly as the bituminous matter part, make bituminous matter have polarity.Though but the material that this patent has proposed to use the method for flow improver drag reduction in gas pipeline and mentioned out some flow improvers, the drag-reduction effect of these materials is limited, and nonideal flow improver.
Summary of the invention
The objective of the invention is to invent a kind of gas pipeline drag reducer that a kind of natural-gas transfer pipeline drag reduction is simple to operate, reaction conditions is gentle and preparation method thereof.
Gas pipeline drag reduction agent of the present invention is to be combined in 1: 1 in molar ratio～2.2: 1 by long chain acid and enamine.
Wherein long chain acid is hexadecanoic acid, octadecanoic acid, nondecylic acid, docosoic acid, Lignoceric acid, hexacosanoic acid, triacontanoic acid, n-dotriacontane acid; Enamine is vinyl-amine, diethyl enamine, diethylenetriamine, triethylene tetramine, diallylamine, allylamine.
The preparation method of this gas pipeline drag reduction agent is: after the heating of long chain acid (FA) adding reactor is dissolved, add enamine (DETA) again, logical nitrogen protection and preheating.Synthetic this product of the method that adopts programmed temperature method and vacuum method to combine, product is pale brown look solid, the product after purifying is faint yellow.
Specifically: the long chain acid that will measure in proportion joins in the reaction vessel, and heater heats while stirring, and the enamine of amount is in proportion injected in long chain acid fusing when temperature reaches 100 ℃ this moment, and logical nitrogen protection is preheating to 120 ℃～140 ℃; After preheating finishes, temperature programming to 210 ℃～220 ℃; Agitator is withdrawn, connected vacuum pump, vacuumized 2～4 hours, reaction finishes, and can get the thick product of pale brown look solid after the cooling.
Last recrystallization is used the ethanolic soln recrystallization, and the gained faint yellow solid is desired product.
The preheating temperature that wherein adds long chain acid and enamine is 120 ℃～140 ℃ and kept 1～1.5 hour.
Wherein temperature programming is to divide different temperature sections to heat up in 3～4 hours, is warmed up to 210 ℃～220 ℃.
Wherein vacuumize and reach vacuum tightness 20～40mmHg.
The principle of institute of the present invention foundation: utilize special macromolecular cpd with the similar constructional feature of tensio-active agent or polymkeric substance, its polar end is bonded in the tube metal internal surface securely, and the slick film of formation one deck, and non-polar end is present in and forms gas-solid interface between fluid and the inner surface of pipeline, the specific molecule structure of utilizing film to have, the rapids energy of absorption fluids and internal surface intersection, thereby reduce the energy that is consumed in internal surface, the rapids that absorbs can spill in the fluid again subsequently, thereby reduce the disorderly degree of turbulent, reach the drag reduction purpose.
This flow improver is being paid in inner-walls of duct and film forming after injecting natural gas line, and the inner-walls of duct surfaceness is obviously reduced, and lip-deep " trench " is by its " filling ", and " filling " relatively evenly.In addition, the lip-deep corrosion product of virgin metal disappears after the film forming, shows that this product has the drag reduction using value.This surface film has snappiness preferably, illustrate that this chain alkyl amidoimidazole quinoline of synthetic has the needed character of Sweet natural gas flow improver, and its film-forming properties and snappiness have fully shown its potential using value as gas pipeline drag reduction agent.
The present invention is obvious to the gas pipeline anti-drag effect, and raw material sources are direct, simple to operate, reaction conditions is gentle, and process is simple relatively, low for equipment requirements, is easy to realize large-scale industrial production.
Description of drawings
The infrared spectrogram of Fig. 1 synthetic product
The infrared spectrogram of Fig. 2 long chain acid
Fig. 3 film forming rear surface
The blank steel disc of Fig. 4 surface
Fig. 5 film forming trailing flank (the right is artificial friction)
Fig. 6 film forming trailing flank (the right is artificial friction)
Embodiment
The specific embodiment of the present invention is described following example and the present invention is further illustrated.
1. examples of embodiment are the test methods in the laboratory.Specifically be that 20 parts hexadecanoic acid is joined in the four-hole boiling flask, inject 10 parts of diethylenetriamines after the heat fused.Logical nitrogen protection slowly is warmed up to 140 ℃.Slowly temperature programming subsequently, in 4 hours by 140 ℃ of temperature programmings to 220 ℃.Connect vacuum pump then, vacuumized 3 hours, vacuum tightness is 20mmHg.The thick product of gained is promptly got product with ethyl alcohol recrystallization.
Embodiment 2. joins 36 parts long chain acid in the four-hole boiling flask, injects 20 parts of enamines after the heat fused.Logical nitrogen protection slowly is warmed up to 140 ℃.Subsequently by the slow temperature programming of above-mentioned temperature-rising method, in 5 hours by 140 ℃ of temperature programmings to 210 ℃.Connect vacuum pump then, vacuumized 2 hours.Vacuum tightness is 25mmHg.The thick product of gained is promptly got product with ethyl alcohol recrystallization.
Embodiment 3. joins 54 parts long chain acid in the four-hole boiling flask, injects 30 parts of diethylenetriamines after the heat fused.Logical nitrogen protection slowly is warmed up to 140 ℃.Subsequently by the slow temperature programming of above-mentioned temperature-rising method, in 5 hours by 140 ℃ of temperature programmings to 215 ℃.Connect vacuum pump then, vacuumized 3 hours.Vacuum tightness is 20mmHg.The thick product of gained is promptly got product with ethyl alcohol recrystallization.
Above-mentioned three routine gained flow improvers are made Infrared spectroscopy through the laboratory, in the infrared spectrogram of Fig. 1 synthetic product, and 2916.86cm
-1Be C-H asymmetrical stretching vibration in the methylene radical, 2849.53cm
-1Be the C-H symmetrical stretching vibration, in many carbon straight-chain paraffin-rocking vibration of CH2-is at 718.16cm
-1Near absorption is arranged, 1469.12cm
-1Be the scissoring vibration bands of a spectrum of hydrocarbon compound, the i.e. formation vibration of C-H flexural vibration and methylene radical.The appearance of above-mentioned charateristic avsorption band illustrates that this material contains the nalka hydrocarbon chain.For ease of comparative analysis, the infrared spectra of testing used long chain acid is illustrated in Fig. 2.In the infrared spectrogram of Fig. 2 long chain acid, 1703.3cm
-1Be the stretching vibration characteristic peak of the C=O base of dimer saturated fatty acid, this peak disappears in production spectra Fig. 1, the long chain acid full entry has been described reaction; 3327.08cm
-1The place is the absorption peak of N-H, and the solid fat acid amides is at 1650～1625cm
-1Between strong absorption band is arranged, as the 1643.89cm among Fig. 1
-1Be acid amides I bands of a spectrum; Solid-state acyclic secondary amide is at 1547～1515cm
-1Acid amides II bands of a spectrum appear in the zone, as the 1548.47cm among Fig. 1
-11614.02cm
-1There is strong absorption peak at the place, and this is the stretching vibration peak of the two keys of C=N in the molecule, and the appearance at this peak has proved that synthetic product is the purpose product.
Film-forming process and electronic microscope photos: with this flow improver through film-forming process and electronic microscope photos, being about to a certain amount of this product is dissolved in adequate amount of ethanol and the diesel oil, immerse wherein handling the steel disc that (oil removing, rust cleaning, with the polishing of metallographic paper) cross, take out behind the certain hour and dry up, on JEDL JSM-6700F scanning electronic microscope, carry out microscopic analysis, the results are shown in Figure 3～Fig. 6.Its roughness of steel disc surface that scribbles this product has had tangible improvement, and lip-deep " trench " is by its " filling ", and " filling " relatively evenly.In addition, the lip-deep corrosion product of virgin metal disappears after the film forming, shows that this product has the drag reduction using value.By Fig. 5 and Fig. 6 as seen, the steel disc surfaceness obviously reduces after the film forming, particularly amplify the back as seen, this surface film has snappiness preferably, illustrate that this chain alkyl amidoimidazole quinoline of synthetic has the needed character of Sweet natural gas flow improver, its film-forming properties and snappiness have fully shown its potential using value as gas pipeline drag reduction agent.
Claims (10)
1. a gas pipeline drag reducer is characterized in that being synthesized in 1: 1 in molar ratio～2.2: 1 by long chain acid and enamine.
2. a kind of gas pipeline drag reducer according to claim 1 is characterized in that described long chain acid is hexadecanoic acid, octadecanoic acid, nondecylic acid, docosoic acid, Lignoceric acid, hexacosanoic acid, triacontanoic acid, n-dotriacontane acid.
3. a kind of gas pipeline drag reducer according to claim 1 is characterized in that described enamine is vinyl-amine, diethyl enamine, diethylenetriamine, triethylene tetramine, diallylamine, allylamine.
4. a kind of gas pipeline drag reducer preparation method of the described a kind of gas pipeline drag reducer of claim 1 is characterized in that adding the enamine of amount in proportion again, logical nitrogen protection and preheating with after the long chain acid adding reactor heating of amount is dissolved in proportion; The synthetic pale brown look solid phase prod of the method that adopts programmed temperature method and vacuum method to combine.
5. a kind of gas pipeline drag reducer preparation method according to claim 4, it is characterized in that the long chain acid that will measure in proportion joins in the reaction vessel, heater, heat while stirring, long chain acid fusing when temperature reaches 100 ℃, inject the enamine of amount in proportion this moment, logical nitrogen protection is preheating to 120 ℃～140 ℃; After preheating finishes, temperature programming to 210 ℃～220 ℃; Agitator is withdrawn, connected vacuum pump, vacuumized 2～4 hours, reaction finishes, and can get the thick product of pale brown look solid after the cooling.
6. according to claim 4 or 5 described a kind of gas pipeline drag reducer preparation methods, it is characterized in that again through recrystallization, purifying is light yellow product behind synthetic pale brown look solid phase prod.
7. according to claim 4 or 5 described a kind of gas pipeline drag reducer preparation methods, it is characterized in that the temperature of the preheating behind the described adding enamine is 120 ℃～140 ℃, and kept 1～1.5 hour.
8. according to claim 4 or 5 described a kind of gas pipeline drag reducer preparation methods, it is characterized in that described programmed temperature method is to divide different temperature sections to heat up in 3～4 hours.
9. according to claim 4 or 5 described a kind of gas pipeline drag reducer preparation methods, it is characterized in that described vacuum method is to vacuumize to reach vacuum tightness 20～40mmHg.
10. a kind of gas pipeline drag reducer preparation method according to claim 6 is characterized in that described recrystallization is to use the ethanolic soln recrystallization.
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| CNA2007101190997A CN101328441A (en) | 2007-06-20 | 2007-06-20 | Gas pipeline drag reducer and preparation thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040908A (en) * | 2010-12-23 | 2011-05-04 | 中国石油天然气股份有限公司 | Antisepsis and antidrag chemical additive of natural gas pipeline and preparation method thereof |
| CN102952287A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气股份有限公司 | High-molecular nanoparticle gas pipeline corrosion inhibition type drag reducer and its preparation method |
| CN103601884A (en) * | 2013-11-12 | 2014-02-26 | 中国科学院过程工程研究所 | Drag reducer for gas pipeline and preparation method thereof |
| WO2015067210A1 (en) * | 2013-11-08 | 2015-05-14 | 中国石油天然气股份有限公司 | Mercaptotriazole drag reducer for transmission pipeline and preparation method therefor |
| WO2015067214A1 (en) * | 2013-11-08 | 2015-05-14 | 中国石油天然气股份有限公司 | Perfluoro phosphate-type gas pipeline drag-reducing agent and method of preparing same |
| CN104633449A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogenous carboxylate natural gas drag reducing agent and synthetic method thereof |
| CN104633450A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogen-contained carboxylate-class natural gas drag-reduction agent and synthesis method of nitrogen-contained carboxylate-class natural gas drag-reduction agent |
| CN104633447A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogen-contained type natural gas drag-reduction agent and synthesis method of nitrogen-contained type natural gas drag-reduction agent |
| CN104633448A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogenous natural gas drag reducing agent and synthetic method thereof |
| CN104390139B (en) * | 2014-10-11 | 2017-03-08 | 中国石油天然气股份有限公司 | A kind of gas pipeline drag reduction agent and preparation method thereof |
| CN109504361A (en) * | 2019-01-14 | 2019-03-22 | 重庆长江造型材料（集团）股份有限公司 | A kind of drag reduction film composition |
| CN111067886A (en) * | 2019-12-10 | 2020-04-28 | 石河子大学 | Free fatty acid capable of effectively reducing morbidity risk of type 2 diabetes and application thereof |
| CN111518030A (en) * | 2020-03-26 | 2020-08-11 | 陕西驭腾实业有限公司 | Imidazoline natural gas drag reducer and synthesis method and application thereof |
| CN112126421A (en) * | 2020-09-04 | 2020-12-25 | 四川省威沃敦化工有限公司 | Drag reducer for chemical fracturing and preparation method thereof |
-
2007
- 2007-06-20 CN CNA2007101190997A patent/CN101328441A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040908A (en) * | 2010-12-23 | 2011-05-04 | 中国石油天然气股份有限公司 | Antisepsis and antidrag chemical additive of natural gas pipeline and preparation method thereof |
| CN102952287A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气股份有限公司 | High-molecular nanoparticle gas pipeline corrosion inhibition type drag reducer and its preparation method |
| RU2637014C1 (en) * | 2013-11-08 | 2017-11-29 | Петрочайна Компани Лимитед | Antifriction agent based on mercaptotriazole for gas pipelines and method of its preparation |
| GB2538876A (en) * | 2013-11-08 | 2016-11-30 | Petrochina Co Ltd | Mercaptotriazole drag reducer for transmission pipeline and preparation method therefor |
| WO2015067214A1 (en) * | 2013-11-08 | 2015-05-14 | 中国石油天然气股份有限公司 | Perfluoro phosphate-type gas pipeline drag-reducing agent and method of preparing same |
| GB2538876B (en) * | 2013-11-08 | 2020-11-04 | Petrochina Co Ltd | Mercaptotriazole-based drag-reducing agent for gas transmission pipelines and preparation method therefor |
| WO2015067210A1 (en) * | 2013-11-08 | 2015-05-14 | 中国石油天然气股份有限公司 | Mercaptotriazole drag reducer for transmission pipeline and preparation method therefor |
| GB2534826A (en) * | 2013-11-08 | 2016-08-03 | Petrochina Co Ltd | Perfluoro phosphate-type gas pipeline drag-reducing agent and method of preparing same |
| CN103601884A (en) * | 2013-11-12 | 2014-02-26 | 中国科学院过程工程研究所 | Drag reducer for gas pipeline and preparation method thereof |
| CN104390139B (en) * | 2014-10-11 | 2017-03-08 | 中国石油天然气股份有限公司 | A kind of gas pipeline drag reduction agent and preparation method thereof |
| CN104633447A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogen-contained type natural gas drag-reduction agent and synthesis method of nitrogen-contained type natural gas drag-reduction agent |
| CN104633448A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogenous natural gas drag reducing agent and synthetic method thereof |
| CN104633450A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogen-contained carboxylate-class natural gas drag-reduction agent and synthesis method of nitrogen-contained carboxylate-class natural gas drag-reduction agent |
| CN104633449A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Nitrogenous carboxylate natural gas drag reducing agent and synthetic method thereof |
| CN109504361A (en) * | 2019-01-14 | 2019-03-22 | 重庆长江造型材料（集团）股份有限公司 | A kind of drag reduction film composition |
| CN111067886A (en) * | 2019-12-10 | 2020-04-28 | 石河子大学 | Free fatty acid capable of effectively reducing morbidity risk of type 2 diabetes and application thereof |
| CN111518030A (en) * | 2020-03-26 | 2020-08-11 | 陕西驭腾实业有限公司 | Imidazoline natural gas drag reducer and synthesis method and application thereof |
| CN112126421A (en) * | 2020-09-04 | 2020-12-25 | 四川省威沃敦化工有限公司 | Drag reducer for chemical fracturing and preparation method thereof |
| CN112126421B (en) * | 2020-09-04 | 2021-04-30 | 四川省威沃敦化工有限公司 | Drag reducer for chemical fracturing and preparation method thereof |
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