CN104513997A - 1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor and applications thereof - Google Patents
1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor and applications thereof Download PDFInfo
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- CN104513997A CN104513997A CN201310442451.6A CN201310442451A CN104513997A CN 104513997 A CN104513997 A CN 104513997A CN 201310442451 A CN201310442451 A CN 201310442451A CN 104513997 A CN104513997 A CN 104513997A
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- ethyl
- inhibiter
- carbon steel
- corrosion
- acid pickling
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- 239000002253 acid Substances 0.000 title claims abstract description 21
- -1 1-ethyl-2-substituted benzimidazole carbon Chemical class 0.000 title claims abstract description 19
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 12
- 239000010962 carbon steel Substances 0.000 title claims abstract description 12
- 238000005554 pickling Methods 0.000 title abstract description 17
- 239000003112 inhibitor Substances 0.000 title abstract description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 22
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000000837 restrainer Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 150000001556 benzimidazoles Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000002000 scavenging effect Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
- 230000005764 inhibitory process Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- WQZQURMQYXGTGQ-UHFFFAOYSA-N 4-(1-ethylbenzimidazol-2-yl)-N,N-diphenylaniline Chemical group C(C)N1C(=NC2=C1C=CC=C2)C2=CC=C(C=C2)N(C2=CC=CC=C2)C2=CC=CC=C2 WQZQURMQYXGTGQ-UHFFFAOYSA-N 0.000 abstract 1
- PYPPCPCLASPCMH-UHFFFAOYSA-N 9-[4-(1-ethylbenzimidazol-2-yl)phenyl]carbazole Chemical compound C(C)N1C(=NC2=C1C=CC=C2)C2=CC=C(C=C2)N2C1=CC=CC=C1C=1C=CC=CC21 PYPPCPCLASPCMH-UHFFFAOYSA-N 0.000 abstract 1
- 235000021110 pickles Nutrition 0.000 description 39
- 230000007613 environmental effect Effects 0.000 description 6
- 239000007769 metal material Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/063—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors heterocyclic compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of production of corrosion inhibitors for preventing metal surface corrosion, and specifically relates to a 1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor, which can prevent unnecessary corrosion and excess acid consumption during the hydrochloric acid pickling process, and applications thereof. The acid pickling inhibitor is 1-ethyl-2-(4-(N,N-diphenyl)aminophenyl)benzimidazole or 1-ethyl-2-((4-carbazole-9-yl)phenyl)benzimidazole. The provided acid pickling inhibitor can effectively prevent the hydrochloric acid corrosion on carbon steel during the pickling process and has the advantages of little using amount, high carrions inhibition efficiency, stable property, and environment-friendliness. The provided acid pickling inhibitor has a high production value and wide market prospect.
Description
Technical field
The present invention relates to corrosion and inhibiter production technical field, specifically in order to prevent carbon steel and the corrosion unnecessary in chlorohydric acid pickling process of goods and acid solution thereof outspent-kind of the 1-ethyl-2-efficient carbon steel pickling corrosion inhibitor of substituted benzimidazole class and application thereof.
Background technology
In industries such as metallic substance, machinery, metallurgy, chemical industry, the corrosion of strong acid clean surface, dirt are the important cleaning means that metal material surface pre-treatment, pipeline and boiler systems clean scale removal.Pickling can reduce the fuel brought because of dirt and expend, and reduces exhaust combustion gases and topsoil, reduces because dirt causes pipeline local to raise, thus the possibility of booster occurs.Therefore, pickling is significant to maintaining the normal operation of equipment, is a kind of method of convenience, efficient, low cost.
The most frequently used acid of pickling is hydrochloric acid, sulfuric acid.In acid cleaning process, because strong acid has corrosive nature to hardware, therefore there will be " crossing erosion " phenomenon, namely acid cleaning process also can corroding metal material while the corrosion of removing metallic surface and dirt.The hydrogen discharged in strong acid corrosion process in addition can spread to metal inside, and making is had by the equipment of washing the possibility that hydrogen embrittlement occurs; The sour gas separated out, can make work situation worsen, produce a large amount of acid solution simultaneously, do great damage to environment.Therefore add inhibiter when pickling, the corrosion of metal in acidic medium can be suppressed, improve pickling efficiency, reduce the usage quantity of acid, the material of proterctive equipment, the work-ing life of extension device.
In inhibiter conventional at present, mainly comprise the mineral compound such as chromic salt, nitrate, nitrite, because it has toxic side effect, environment friendly is poor, and its application is being restricted and will progressively eliminating.And green corrosion inhibitor not only in use environmental sound is nontoxic, production and manufacturing processed in also can not cause detrimentally affect to environment.At present, along with the enhancing of mankind's environmental consciousness and going deep into of the idea of sustainable development, develop new efficient, environmental protection, cheap, the organic inhibitor of good stability has higher productive value and wide market outlook.
Summary of the invention
The object of the present invention is to provide a kind of efficient, cheap, environmental protection, the 1-ethyl-2-substituted benzimidazole carbon steel restrainer of good stability and application thereof.
For realizing above object, the technical solution used in the present invention is: a kind of carbon steel pickling corrosion inhibitor, it is characterized in that described inhibiter is 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline, the one in 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline.
The invention provides the application in carbon steel pickling of above-mentioned 1-ethyl-2-substituted benzimidazole carbon steel restrainer.
Be 0.025g-0.15g according to the amount adding inhibiter in often liter of acid solution, inhibiter being added concentration is in the dilute hydrochloric acid of 1mol/L; With the acid solution submergence cleaning steel adding inhibiter, wherein submergence temperature is 30 DEG C-40 DEG C, and Immersion time is 18h.
Principle of the present invention is: inhibiter involved in the present invention is a kind of 1-ethyl-2-substituted benzimidazole class organic compound, containing the atom such as nitrogen, heterocycle or functional group in this compound molecule, effectively can be adsorbed on steel surface, play corrosion inhibition.
The invention has the beneficial effects as follows:
1. environmental friendliness.Inhibiter of the present invention is 1-ethyl-2-substituted benzimidazole compounds, is organic inhibitor, and compared with inorganic inhibitor conventional at present, toxicity is little, environmentally friendly, does not deposit environmental problem after a procedure, meets the trend of green corrosion inhibitor development.
2. cost is low.Inhibiter of the present invention is benzimidazoles compound, and synthesis step is simple, and cheaper starting materials is easy to get.
3. consumption is low, and result of use is good.The present invention is used for steel surface pickling, add a small amount of inhibiter and just effectively can suppress consuming excessively of the excessive etch (i.e. unwanted corrosion) of metallic substance metal in acid cleaning process and acid solution, compare with inhibiter conventional at present, there is consumption low, inhibition efficiency is high, the outstanding advantages that continuous action ability is strong.
4. corrosion inhibition is stablized.Inhibiter of the present invention can bear the change of cleaning condition, and as temperature, acid strength etc., do not affect the corrosion mitigating effect of inhibiter.
Embodiment
The present invention installs GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method " and carries out weight loss experiment.
Embodiment 1
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 5g, under 30 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 89%, is shown as efficient inhibiter.
Embodiment 2
Pickle solution is dilute hydrochloric acid, concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 10g, under 30 DEG C of conditions, steel to be cleaned are immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 93%, is shown as efficient inhibiter.
Embodiment 3
Pickle solution is dilute hydrochloric acid, concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 15g, under 30 DEG C of conditions, steel to be cleaned are immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 96%, is shown as efficient inhibiter.
Embodiment 4
Pickle solution is dilute hydrochloric acid, concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 2.5g, under 40 DEG C of conditions, steel to be cleaned are immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 87%, is shown as efficient inhibiter.
Embodiment 5
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 5g, under 40 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 88%, is shown as efficient inhibiter.
Embodiment 6
Pickle solution is dilute hydrochloric acid, concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 10g, under 40 DEG C of conditions, steel to be cleaned are immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 92%, is shown as efficient inhibiter.
Embodiment 7
Pickle solution is dilute hydrochloric acid, concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline 15g, under 40 DEG C of conditions, steel to be cleaned are immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 95%, is shown as efficient inhibiter.
Embodiment 8
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 5g, under 30 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 95%, is shown as efficient inhibiter.
Embodiment 9
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 10g, under 30 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 96%, is shown as efficient inhibiter.
Embodiment 10
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 15g, under 30 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 97%, is shown as efficient inhibiter.
Embodiment 11
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 5g, under 40 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 94%, is shown as efficient inhibiter.
Embodiment 12
Pickle solution is dilute hydrochloric acid, and concentration is 1mol/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 10g, under 40 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 95%, is shown as efficient inhibiter.
Embodiment 13
Pickle solution is dilute hydrochloric acid, and concentration is 1mo1/L, pickle solution consumption 100L, adds 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline 15g, under 40 DEG C of conditions, steel to be cleaned is immersed in submergence 18h in pickle solution.
The highest inhibition efficiency obtained by experimental test is 96%, is shown as efficient inhibiter.
Claims (3)
1. a 1-ethyl-2-substituted benzimidazole carbon steel restrainer, it is characterized in that: inhibiter composition is benzimidazoles compound, described compound is: 1-ethyl-2-(4-(N, N-phenylbenzene) aminophenyl) benzoglyoxaline, any one in 1-ethyl-2-((4-carbazole-9-base) phenyl) benzoglyoxaline.
2. according to an application for benzoglyoxaline carbon steel restrainer according to claim 1, it is characterized in that: with the scavenging solution submergence cleaning steel being added with benzimidazoles inhibiter.
3. application according to claim 2, is characterized in that: be 0.025g-0.15g by the amount adding inhibiter in often liter of acid solution, and inhibiter being added concentration is in the dilute hydrochloric acid of 1mo1/L, and wherein submergence temperature is 30 DEG C-40 DEG C, and Immersion time is 18h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442451.6A CN104513997A (en) | 2013-09-26 | 2013-09-26 | 1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor and applications thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442451.6A CN104513997A (en) | 2013-09-26 | 2013-09-26 | 1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor and applications thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104513997A true CN104513997A (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310442451.6A Pending CN104513997A (en) | 2013-09-26 | 2013-09-26 | 1-ethyl-2-substituted benzimidazole carbon steel acid pickling inhibitor and applications thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN104513997A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947122A (en) * | 2015-05-04 | 2015-09-30 | 华中科技大学 | Application and preparation method of benzimidazole derivative |
| CN115028591A (en) * | 2022-06-17 | 2022-09-09 | 内江金鸿曲轴有限公司 | Anthraquinone compound and application thereof |
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|---|---|---|---|---|
| SU1697395A1 (en) * | 1990-02-12 | 1998-04-10 | Институт физико-органической химии и углехимии АН УССР | 4-quinolylbenzimidazole quaternary salts as inhibitors of steel corrosion in hydrochloric acid solution |
| CN1424435A (en) * | 2002-12-20 | 2003-06-18 | 上海电力学院 | Composite corrosion inhibitor containg mercapto-heterocyclic compound and alkali metal iodide |
| CN102174022A (en) * | 2011-03-17 | 2011-09-07 | 南京工业大学 | 1-alkyl-2-substituted phenyl benzimidazole compound synthesis method and application |
-
2013
- 2013-09-26 CN CN201310442451.6A patent/CN104513997A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1697395A1 (en) * | 1990-02-12 | 1998-04-10 | Институт физико-органической химии и углехимии АН УССР | 4-quinolylbenzimidazole quaternary salts as inhibitors of steel corrosion in hydrochloric acid solution |
| CN1424435A (en) * | 2002-12-20 | 2003-06-18 | 上海电力学院 | Composite corrosion inhibitor containg mercapto-heterocyclic compound and alkali metal iodide |
| CN102174022A (en) * | 2011-03-17 | 2011-09-07 | 南京工业大学 | 1-alkyl-2-substituted phenyl benzimidazole compound synthesis method and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947122A (en) * | 2015-05-04 | 2015-09-30 | 华中科技大学 | Application and preparation method of benzimidazole derivative |
| CN115028591A (en) * | 2022-06-17 | 2022-09-09 | 内江金鸿曲轴有限公司 | Anthraquinone compound and application thereof |
| CN115028591B (en) * | 2022-06-17 | 2024-05-28 | 内江金鸿曲轴有限公司 | Anthraquinone compound and application thereof |
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Application publication date: 20150415 |