CN105542737A - Preparation method and application of high-temperature high-pressure corrosion inhibitor capable of resisting corrosion by H2S and CO2 - Google Patents
Preparation method and application of high-temperature high-pressure corrosion inhibitor capable of resisting corrosion by H2S and CO2 Download PDFInfo
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- CN105542737A CN105542737A CN201510916444.4A CN201510916444A CN105542737A CN 105542737 A CN105542737 A CN 105542737A CN 201510916444 A CN201510916444 A CN 201510916444A CN 105542737 A CN105542737 A CN 105542737A
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- inhibiter
- corrosion
- preparation
- triethylene tetramine
- dimethylbenzene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
Abstract
The invention discloses a preparation method and application of a high-temperature high-pressure corrosion inhibitor capable of resisting corrosion by H2S and CO2. The corrosion inhibitor is prepared from the following raw materials by mol: 10 to 26% of triethylene tetramine, 10 to 26% of myristic acid, 20 to 36% of xylene, 25 to 35% of thiosemicarbazide and 10 to 30% of polyol. The preparation method for the corrosion inhibitor comprises the following steps: step 1, subjecting myristic acid and triethylene tetramine to amidation so as to obtain an imidazoline intermediate; and step 2, subjecting the imidazoline intermediate and thiosemicarbazide to a condensation reaction so as to obtain the corrosion inhibitor. The preparation method for the corrosion inhibitor is simple and does not need special equipment; the prepared corrosion inhibitor has excellent corrosion inhibition efficiency and corrosion resistant, is applicable to yield increase operation in an oil and gas well containing H2S with a concentration of as high as more than 30 mg/L and saturated CO2; and after addition of the corrosion inhibitor, the corrosion rate of a steel disc is less than 0.05 mm/a, which accords with national corrosion standards in China.
Description
Technical field
The present invention relates to oilfield chemistry product technical field, particularly relate to a kind of anti-H
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion and application thereof.
Background technology
Along with global energy supply and demand are day by day fierce, countries in the world start to expand energy sources or adjustment energy consumption structure one after another, alleviate the contradiction that Nonrenewable energy resources and people's energy consumption increase day by day.Oil and gas is subject to the great attention of countries in the world as important strategic resource always, but along with few exploitation of new hydrocarbon resources, high containing H
2s, CO
2, Cl
-and the oil-gas field of the multiple badness-media more such as hydrate occurs in succession.
High containing H
2s, CO
2oil-gas field is mainly distributed in region, the Sichuan Basin, and the oil-gas field in this region 2/3 is containing H
2s and CO
2, just have 990 billion cubic meters in the Sweet natural gas that Tenth Five-Year Plan Period is verified for high containing H
2s gas.Under high temperature peracid Oil/gas Well, system corrosion environment is very severe, is mainly reflected in the following aspects:
(1) High Temperature High Pressure and H
2s+H
2s+Cl
-to coexist and the interaction of highly mineralized formation brines causes heavy corrosion to subsurface tool, down-hole string, wellhead equipment and ground flow;
(2) under high yield, high-velocity fluid causes long-term erosion to tube wall;
(3) change of the horizontal force of the velocity variations generation of high-velocity fluid causes tube wall explosion etc.
Therefore, study a kind of inhibiter, protect oil gas subsurface tool, tubing string, wellhead equipment and aboveground pipeline thus, to promoting the exploitation of the Efficient Exploration of Oil/gas Well and reducing by corroding the financial loss caused significant.
Summary of the invention
For the weak point existed in above-mentioned technology, the invention provides a kind of anti-H
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion and application thereof, this inhibiter is at high temperature room temperature to 160 DEG C, to H
2s, CO
2there is good anti-corrosion effects, and inhibition efficiency is more than 98%.
For achieving the above object, the invention provides a kind of anti-H
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, the raw material of this inhibiter comprises by mol ratio per-cent: triethylene tetramine 10-26%, tetradecanoic acid 10-26%, dimethylbenzene 20-36%, thiosemicarbazide 25-35% and polyvalent alcohol 10-30%;
The preparation method of this inhibiter comprises the following steps:
Step 1, adopts tetradecanoic acid and triethylene tetramine generation amidate action to obtain imidazoline intermediate;
Step 2, then imidazoline intermediate and thiosemicarbazide generation condensation reaction are obtained this inhibiter;
This inhibiter is to H
2s, CO
2there is anti-corrosion effects.
Wherein, the concrete steps of described step 1 are:
Step 11, slowly joins the tetradecanoic acid of the triethylene tetramine of 10-26% and 10-26% dosage in the dimethylbenzene of 20-36% and mixes, transferred in there-necked flask by the said mixture obtained, and in temperature 40
oc-160
oreact 3-5h in the well heater of C, the water generated in reaction is steamed with azeotrope, and amidate action completes;
Step 12, then the temperature of reaction in well heater is continued to be raised to 200
oC-240
oC, with water trap, unnecessary moisture is gone out; Ooze now when anhydrous in water trap, reactant is cooled to 100
oc-120
oc, is being cooled to 100
oc-120
odistill out excessive triethylene tetramine and dimethylbenzene under C reduced pressure, the imidazoline intermediate of shape is partly solidified in room temperature cooling.
Wherein, the concrete steps of described step 2 are: add in reactor, with 10-30% polyvalent alcohol for solvent, 140 by imidazoline intermediate and 25-35% thiosemicarbazide
oc-160
ocondensation reaction 5-8h under C; Vacuum distilling takes off and repeatedly recrystallization obtains yellow solid, is this inhibiter.
Wherein, described inhibiter is at room temperature half curdled appearance.
Wherein, described polyvalent alcohol is glycerol, tetramethylolmethane or n-Octanol.
Wherein, described 1mol tetradecanoic acid and 2mol triethylene tetramine are joined in 1mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 130
oc reacting by heating 4h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again 1mol imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1mol n-Octanol and to be transferred in there-necked flask, in the reactor 140
oafter C reacting by heating 5h, vacuum distilling repeatedly recrystallization obtains yellow solid and is this inhibiter.
Wherein, described 1.5mol tetradecanoic acid and 1.5mol triethylene tetramine are joined in 1.5mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 140
oc reacting by heating 3h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1.5mol n-Octanol and to be transferred in there-necked flask, in the reactor 130
oafter C reacting by heating 6h, vacuum distilling repeatedly recrystallization obtains yellow solid and is this inhibiter.
For achieving the above object, the present invention also provides a kind of anti-H
2s, CO
2the application of the High Temperature High Pressure inhibiter of corrosion, is characterized in that, adopts weight-loss method, 70
ounder C by Q235 steel containing in the hydrochloric acid soln coexisted of 100mg/L inhibiter, corrosion treatment 72h; And contrast with the Q235 steel of the corrosion treatment not adding inhibiter; The display of weightless test result is after adding inhibiter, and the erosion rate of Q235 steel is lower than the Corrosion standards of national regulation;
This inhibiter is mainly used in oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline.
The invention has the beneficial effects as follows: compared with prior art, anti-H provided by the invention
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion and application thereof, adopt tetradecanoic acid and triethylene tetramine that amidate action at high temperature occurs and obtain imidazoline intermediate, again by the imidazoline intermediate after purifying and thiosemicarbazide generation condensation reaction, finally obtain inhibiter; This production technique is simple, without the need to specific installation.This inhibiter is at high temperature room temperature to 160 DEG C, to H
2s, CO
2there is good anti-corrosion effects, and inhibition efficiency is more than 98%, illustrates that this inhibiter has excellent inhibition efficiency thus, be applicable to high containing H
2more than S(30mg/L), CO
2the job execution of (saturated) well production increment, adds the erosion rate of steel disc after inhibiter lower than 0.05mm/a, the Corrosion standards of erosion rate national regulation.
The use of this inhibiter, effectively avoids the places such as oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline to occur heavy corrosion phenomenon, and avoids the explosion of tube wall.This inhibiter, protection oil gas subsurface tool, tubing string, wellhead equipment and aboveground pipeline, serve vital effect to promoting the exploitation of the Efficient Exploration of Oil/gas Well and reducing by corroding the financial loss caused.
Accompanying drawing explanation
Fig. 1 is anti-H of the present invention
2s, CO
2the process flow sheet of the preparation method of the High Temperature High Pressure inhibiter of corrosion;
Fig. 2 is the experimental data comparison diagram of five embodiments in the present invention.
Embodiment
In order to more clearly state the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Refer to Fig. 1, anti-H of the present invention
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, the raw material of this inhibiter comprises by mol ratio per-cent: triethylene tetramine 10-26%, tetradecanoic acid 10-26%, dimethylbenzene 20-36%, thiosemicarbazide 25-35% and polyvalent alcohol 10-30%;
The preparation method of this inhibiter comprises the following steps:
Step S1, adopts tetradecanoic acid and triethylene tetramine generation amidate action to obtain imidazoline intermediate; This step is specially: step S11, is slowly joined in the dimethylbenzene of 20-36% by the tetradecanoic acid of the triethylene tetramine of 10-26% and 10-26% dosage and mixes, transferred in there-necked flask by the said mixture obtained, and in temperature 40
oc-160
oreact 3-5h in the well heater of C, the water generated in reaction is steamed with azeotrope, and amidate action completes;
Step S12, then the temperature of reaction in well heater is continued to be raised to 200
oC-240
oC, with water trap, unnecessary moisture is gone out; Ooze now when anhydrous in water trap, reactant is cooled to 100
oc-120
oc, is being cooled to 100
oc-120
odistill out excessive triethylene tetramine and dimethylbenzene under C reduced pressure, the imidazoline intermediate of shape is partly solidified in room temperature cooling;
Step S2, then imidazoline intermediate and thiosemicarbazide generation condensation reaction are obtained inhibiter.This step is specially: add in reactor, with 10-30% polyvalent alcohol for solvent, 140 by imidazoline intermediate and 25-35% thiosemicarbazide
oc-160
ocondensation reaction 5-8h under C; Vacuum distilling takes off and repeatedly recrystallization obtains yellow solid, is inhibiter.This inhibiter is at room temperature half curdled appearance.
This inhibiter is at high temperature room temperature to 160 DEG C, to H
2s, CO
2there is good anti-corrosion effects, and inhibition efficiency is more than 98%.
Compared to the situation of prior art, anti-H provided by the invention
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, adopt tetradecanoic acid and triethylene tetramine that amidate action at high temperature occurs and obtain imidazoline intermediate, again by the imidazoline intermediate after purifying and thiosemicarbazide generation condensation reaction, finally obtain inhibiter; This production technique is simple, without the need to specific installation.The inhibiter prepared has excellent inhibition efficiency, is applicable to high containing H
2more than S(30mg/L), CO
2the job execution of (saturated) well production increment, adds the erosion rate of steel disc after inhibiter lower than 0.05mm/a, the Corrosion standards of erosion rate national regulation.The erosion rate standard of national regulation is 0.076mm/a.
The preparation of this inhibiter, effectively avoids the places such as oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline to occur heavy corrosion phenomenon, and avoids the explosion of tube wall.This inhibiter, protection oil gas subsurface tool, tubing string, wellhead equipment and aboveground pipeline, serve vital effect to promoting the exploitation of the Efficient Exploration of Oil/gas Well and reducing by corroding the financial loss caused.
In the present embodiment, polyvalent alcohol is glycerol, tetramethylolmethane or n-Octanol.Be not limited to the type of polyvalent alcohol in certain this case, dissimilar polyvalent alcohol can be selected according to practical situation.
For achieving the above object, the present invention also provides a kind of anti-H
2s, CO
2the application of the High Temperature High Pressure inhibiter of corrosion, adopts weight-loss method, 70
ounder C by Q235 steel containing in the hydrochloric acid soln coexisted of 100mg/L inhibiter, corrosion treatment 72h; And contrast with the Q235 steel of the corrosion treatment not adding inhibiter; The display of weightless test result is after adding inhibiter, and the erosion rate of Q235 steel is lower than the Corrosion standards of national regulation; This inhibiter is mainly used in oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline.
Compared to the situation of prior art, anti-H provided by the invention
2s, CO
2the application of the High Temperature High Pressure inhibiter of corrosion, because inhibiter has excellent inhibition efficiency, is applicable to high containing H
2more than S(30mg/L), CO
2the job execution of (saturated) well production increment, adds the erosion rate of steel disc after inhibiter lower than 0.05mm/a, the Corrosion standards of erosion rate national regulation; After this inhibiter being used for the occasions such as oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline, effectively avoid the generation of following phenomenon:
1) avoid causing heavy corrosion to subsurface tool, down-hole string, wellhead equipment and ground flow;
2) under avoiding high yield, high-velocity fluid causes long-term erosion to tube wall;
3) change of the horizontal force avoiding the velocity variations of high-velocity fluid to produce causes tube wall explosion etc.;
4) oil gas subsurface tool, tubing string, wellhead equipment and aboveground pipeline can be protected, to promoting the exploitation of the Efficient Exploration of Oil/gas Well and reducing by corroding the financial loss caused significant.
Based on the anti-H of the present invention
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, provides following five specific embodiments:
Embodiment 1:
1mol tetradecanoic acid and 2mol triethylene tetramine are joined in 1mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 130
oc reacting by heating 4h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again 1mol imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1mol n-Octanol and to be transferred in there-necked flask, in the reactor 140
oafter C reacting by heating 5h, vacuum distilling repeatedly recrystallization obtains yellow solid and is inhibiter.
Adopt weight-loss method, 130
ounder C by Q235 steel at the H containing 100mg/L inhibiter
2s, CO
2in the hydrochloric acid soln coexisted, corrosion treatment 72h, and contrast with the Q235 steel of the corrosion treatment not adding inhibiter.The display of weightless test result is after adding inhibiter, and the erosion rate of Q235 steel is 0.038mm/a, lower than the Corrosion standards 0.076mm/a of national regulation.
Embodiment 2:
1.5mol tetradecanoic acid and 1.5mol triethylene tetramine are joined in 1.5mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 140
oc reacting by heating 3h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1.5mol n-Octanol and to be transferred in there-necked flask, in the reactor 130
oafter C reacting by heating 6h, vacuum distilling repeatedly recrystallization obtains yellow solid and is inhibiter.
According to the method for embodiment 1 at 140 DEG C of temperature, carry out corrosion inhibition test and comparison, experimental data shows, after adding inhibiter, the erosion rate of Q235 steel is 0.045mm/a, lower than the Corrosion standards 0.076mm/a of national regulation.
Embodiment 3:
2mol tetradecanoic acid and 1.5mol triethylene tetramine are joined in 1mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 150
oc reacting by heating 5h, is cooled to 120
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 2mol thiosemicarbazide to be joined in 1.5mol n-Octanol and to be transferred in there-necked flask, in the reactor 160
oafter C reacting by heating 4h, vacuum distilling repeatedly recrystallization obtains yellow solid and is inhibiter.
According to the method for embodiment 1 at 150 DEG C, carry out corrosion inhibition test and comparison, experimental data shows, after adding inhibiter, the erosion rate of Q235 steel is 0.042mm/a, lower than the Corrosion standards 0.076mm/a of national regulation.
Embodiment 4:
1.5mol tetradecanoic acid and 2mol triethylene tetramine are joined in 0.8mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 140
oc reacting by heating 3h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 1mol thiosemicarbazide to be joined in 1.5mol n-Octanol and to be transferred in there-necked flask, in the reactor 110
oafter C reacting by heating 3h, vacuum distilling repeatedly recrystallization obtains yellow solid and is inhibiter.
According to the method for embodiment 1 at 160 DEG C, carry out corrosion inhibition test and comparison, experimental data shows, after adding inhibiter, the erosion rate of Q235 steel is 0.040mm/a, lower than the Corrosion standards 0.076mm/a of national regulation.
Embodiment 5:
1mol tetradecanoic acid and 2mol triethylene tetramine are joined in 1.5mol dimethylbenzene, said mixture is transferred in there-necked flask, in the reactor 160
oc reacting by heating 3h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 2.5mol thiosemicarbazide to be joined in 1mol n-Octanol and to be transferred in there-necked flask, in the reactor 140
oafter C reacting by heating 6h, vacuum distilling repeatedly recrystallization obtains yellow solid and is inhibiter.
According to the method for embodiment 1 at 170 DEG C, carry out corrosion inhibition test and comparison, experimental data shows, after adding inhibiter, the erosion rate of Q235 steel is 0.055mm/a, lower than the Corrosion standards 0.076mm/a of national regulation.
Please consult Fig. 2 further, be the experimental data comparison diagram of above-mentioned five embodiments, as can be seen from the figure, this experiment is at H
2s is 0.75MPa, CO
2for what complete under the condition of high voltage of 0.75MPa, as can be seen from these data, to 160 DEG C from temperature 130 DEG C, after adding this inhibiter, the erosion rate of this Q235 steel is all lower than the Corrosion standards 0.076mm/a of national regulation; But when temperature is higher than 160 DEG C, and after arriving 170 DEG C, after adding this inhibiter, the erosion rate of this Q235 steel significantly improves, and illustrates H
2s, CO
2anti-corrosion effects weakens; This inhibiter of above-mentioned data presentation is at high temperature room temperature to 160 DEG C, to H
2s, CO
2there is good anti-corrosion effects.As can be seen from another group inhibition efficiency, to 160 DEG C from temperature 130 DEG C, the corrosion inhibition rate of this inhibiter is in increasing progressively distribution, and from working as temperature higher than 160 DEG C, and after arriving 170 DEG C, the corrosion inhibition rate of inhibiter obviously declines; Therefore can illustrate that this inhibiter is at high temperature room temperature to 160 DEG C, inhibition efficiency is more than 98%.
Above-mentioned five groups of data declarations, this inhibiter is at high temperature room temperature to 160 DEG C, to H
2s, CO
2there is good anti-corrosion effects, and corrosion inhibition rate is more than 98%.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. an anti-H
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, it is characterized in that, the raw material of this inhibiter comprises by mol ratio per-cent: triethylene tetramine 10-26%, tetradecanoic acid 10-26%, dimethylbenzene 20-36%, thiosemicarbazide 25-35% and polyvalent alcohol 10-30%;
The preparation method of this inhibiter comprises the following steps:
Step 1, adopts tetradecanoic acid and triethylene tetramine generation amidate action to obtain imidazoline intermediate;
Step 2, then imidazoline intermediate and thiosemicarbazide generation condensation reaction are obtained this inhibiter;
This inhibiter is to H
2s, CO
2there is anti-corrosion effects.
2. anti-H according to claim 1
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, it is characterized in that, the concrete steps of described step 1 are:
Step 11, slowly joins the tetradecanoic acid of the triethylene tetramine of 10-26% and 10-26% dosage in the dimethylbenzene of 20-36% and mixes, transferred in there-necked flask by the said mixture obtained, and in temperature 40
oc-160
oreact 3-5h in the well heater of C, the water generated in reaction is steamed with azeotrope, and amidate action completes;
Step 12, then the temperature of reaction in well heater is continued to be raised to 200
oC-240
oC, with water trap, unnecessary moisture is gone out; Ooze now when anhydrous in water trap, reactant is cooled to 100
oc-120
oc, is being cooled to 100
oc-120
odistill out excessive triethylene tetramine and dimethylbenzene under C reduced pressure, the imidazoline intermediate of shape is partly solidified in room temperature cooling.
3. anti-H according to claim 2
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, it is characterized in that, the concrete steps of described step 2 are: add in reactor, with 10-30% polyvalent alcohol for solvent, 140 by imidazoline intermediate and 25-35% thiosemicarbazide
oc-160
ocondensation reaction 5-8h under C; Vacuum distilling takes off and repeatedly recrystallization obtains yellow solid, is this inhibiter.
4. anti-H according to claim 3
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, it is characterized in that, described inhibiter is at room temperature half curdled appearance.
5. anti-H according to claim 3
2s, CO
2the preparation method of the High Temperature High Pressure inhibiter of corrosion, it is characterized in that, described polyvalent alcohol is glycerol, tetramethylolmethane or n-Octanol.
6. anti-H according to claim 5
2s, CO
2the preparation method of High Temperature High Pressure inhibiter of corrosion, is characterized in that, describedly joins in 1mol dimethylbenzene by 1mol tetradecanoic acid and 2mol triethylene tetramine, is transferred to by said mixture in there-necked flask, in the reactor 130
oc reacting by heating 4h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again 1mol imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1mol n-Octanol and to be transferred in there-necked flask, in the reactor 140
oafter C reacting by heating 5h, vacuum distilling repeatedly recrystallization obtains yellow solid and is this inhibiter.
7. anti-H according to claim 5
2s, CO
2the preparation method of High Temperature High Pressure inhibiter of corrosion, is characterized in that, describedly joins in 1.5mol dimethylbenzene by 1.5mol tetradecanoic acid and 1.5mol triethylene tetramine, is transferred to by said mixture in there-necked flask, in the reactor 140
oc reacting by heating 3h, is cooled to 110
oc underpressure distillation obtains imidazoline intermediate after going out excessive triethylene tetramine and dimethylbenzene; Again imidazoline intermediate and 1.5mol thiosemicarbazide to be joined in 1.5mol n-Octanol and to be transferred in there-necked flask, in the reactor 130
oafter C reacting by heating 6h, vacuum distilling repeatedly recrystallization obtains yellow solid and is this inhibiter.
8. an anti-H
2s, CO
2the application of the High Temperature High Pressure inhibiter of corrosion, is characterized in that, adopts weight-loss method, 70
ounder C by Q235 steel containing in the hydrochloric acid soln coexisted of 100mg/L inhibiter, corrosion treatment 72h; And contrast with the Q235 steel of the corrosion treatment not adding inhibiter; The display of weightless test result is after adding inhibiter, and the erosion rate of Q235 steel is lower than the Corrosion standards of national regulation;
This inhibiter is mainly used in oil-gas field subsurface tool, tubing string, wellhead equipment and aboveground pipeline.
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|---|---|---|---|
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| CN106757046A (en) * | 2016-12-29 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit and preparation method thereof |
| CN106757048A (en) * | 2016-12-13 | 2017-05-31 | 沈阳防锈包装材料有限责任公司 | A kind of heat supply network anticorrosion corrosion inhibitor and preparation and application |
| CN113584490A (en) * | 2021-08-02 | 2021-11-02 | 上海贵通新材料科技有限公司 | Hydrogenation corrosion inhibitor |
| CN114427096A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Compound corrosion inhibitor suitable for storage tank gas phase area corrosion medium and preparation method thereof |
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| CN106757048A (en) * | 2016-12-13 | 2017-05-31 | 沈阳防锈包装材料有限责任公司 | A kind of heat supply network anticorrosion corrosion inhibitor and preparation and application |
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| CN106757046A (en) * | 2016-12-29 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter for sulfur-bearing moisture conveyance conduit and preparation method thereof |
| CN106757046B (en) * | 2016-12-29 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiter and preparation method thereof for sulfur-bearing moisture conveyance conduit |
| CN114427096A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Compound corrosion inhibitor suitable for storage tank gas phase area corrosion medium and preparation method thereof |
| CN114427096B (en) * | 2020-10-10 | 2024-02-09 | 中国石油化工股份有限公司 | Compound corrosion inhibitor applicable to storage tank gas phase area corrosive medium and preparation method thereof |
| CN113584490A (en) * | 2021-08-02 | 2021-11-02 | 上海贵通新材料科技有限公司 | Hydrogenation corrosion inhibitor |
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