WO2021225462A1 - Use of anisidine derivatives as a corrosion and hydrogen embrittlement inhibitor - Google Patents
Use of anisidine derivatives as a corrosion and hydrogen embrittlement inhibitor Download PDFInfo
- Publication number
- WO2021225462A1 WO2021225462A1 PCT/RU2020/000217 RU2020000217W WO2021225462A1 WO 2021225462 A1 WO2021225462 A1 WO 2021225462A1 RU 2020000217 W RU2020000217 W RU 2020000217W WO 2021225462 A1 WO2021225462 A1 WO 2021225462A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- corrosion
- inhibitor
- hydrogen embrittlement
- amide
- hydrocarbon
- Prior art date
Links
- 239000003112 inhibitor Substances 0.000 title claims abstract description 116
- 230000007797 corrosion Effects 0.000 title claims abstract description 97
- 238000005260 corrosion Methods 0.000 title claims abstract description 97
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000001257 hydrogen Substances 0.000 title claims abstract description 45
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 45
- BHAAPTBBJKJZER-UHFFFAOYSA-N p-anisidine Chemical class COC1=CC=C(N)C=C1 BHAAPTBBJKJZER-UHFFFAOYSA-N 0.000 title abstract description 28
- 150000001408 amides Chemical class 0.000 claims abstract description 32
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 26
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 24
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 24
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 4
- 125000005608 naphthenic acid group Chemical group 0.000 claims description 16
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 30
- 239000002184 metal Substances 0.000 abstract description 30
- 150000002739 metals Chemical class 0.000 abstract description 26
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 abstract description 18
- 150000001875 compounds Chemical class 0.000 abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001805 chlorine compounds Chemical class 0.000 abstract 2
- 239000005864 Sulphur Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 44
- 238000002360 preparation method Methods 0.000 description 21
- 238000012360 testing method Methods 0.000 description 20
- 239000003921 oil Substances 0.000 description 19
- VMPITZXILSNTON-UHFFFAOYSA-N o-anisidine Chemical compound COC1=CC=CC=C1N VMPITZXILSNTON-UHFFFAOYSA-N 0.000 description 16
- 239000002994 raw material Substances 0.000 description 16
- 125000004172 4-methoxyphenyl group Chemical group [H]C1=C([H])C(OC([H])([H])[H])=C([H])C([H])=C1* 0.000 description 15
- 230000001681 protective effect Effects 0.000 description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 14
- 239000000243 solution Substances 0.000 description 14
- NCBZRJODKRCREW-UHFFFAOYSA-N m-anisidine Chemical compound COC1=CC=CC(N)=C1 NCBZRJODKRCREW-UHFFFAOYSA-N 0.000 description 13
- 239000000047 product Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000002609 medium Substances 0.000 description 12
- 125000004204 2-methoxyphenyl group Chemical group [H]C1=C([H])C(*)=C(OC([H])([H])[H])C([H])=C1[H] 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000002253 acid Substances 0.000 description 11
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000013543 active substance Substances 0.000 description 10
- -1 nitrogen-containing organic compounds Chemical class 0.000 description 10
- 125000004207 3-methoxyphenyl group Chemical group [H]C1=C([H])C(*)=C([H])C(OC([H])([H])[H])=C1[H] 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 150000003254 radicals Chemical class 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 150000003841 chloride salts Chemical class 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000005292 vacuum distillation Methods 0.000 description 8
- 229910001868 water Inorganic materials 0.000 description 8
- KNZWULOUXYKBLH-UHFFFAOYSA-N 2-methoxy-n-methylaniline Chemical compound CNC1=CC=CC=C1OC KNZWULOUXYKBLH-UHFFFAOYSA-N 0.000 description 7
- ZFMZSZMUFWRAOG-UHFFFAOYSA-N 3-methoxy-n-methylaniline Chemical compound CNC1=CC=CC(OC)=C1 ZFMZSZMUFWRAOG-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 239000012153 distilled water Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- YVHAIVPPUIZFBA-UHFFFAOYSA-N Cyclopentylacetic acid Chemical compound OC(=O)CC1CCCC1 YVHAIVPPUIZFBA-UHFFFAOYSA-N 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 5
- 230000002528 anti-freeze Effects 0.000 description 5
- 239000012736 aqueous medium Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000003350 kerosene Substances 0.000 description 5
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N isopropyl alcohol Natural products CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 150000003464 sulfur compounds Chemical class 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- LJOODBDWMQKMFB-UHFFFAOYSA-N cyclohexylacetic acid Chemical compound OC(=O)CC1CCCCC1 LJOODBDWMQKMFB-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- ZRPLANDPDWYOMZ-UHFFFAOYSA-N 3-cyclopentylpropionic acid Chemical compound OC(=O)CCC1CCCC1 ZRPLANDPDWYOMZ-UHFFFAOYSA-N 0.000 description 2
- FAXDZWQIWUSWJH-UHFFFAOYSA-N 3-methoxypropan-1-amine Chemical compound COCCCN FAXDZWQIWUSWJH-UHFFFAOYSA-N 0.000 description 2
- YIDKMWJJCIUSPI-UHFFFAOYSA-N 4-cyclopentylbutanoic acid Chemical compound OC(=O)CCCC1CCCC1 YIDKMWJJCIUSPI-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000007859 condensation product Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 150000002462 imidazolines Chemical class 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 0 *CC(N(*)C1CC=*=C(*)CC1)=O Chemical compound *CC(N(*)C1CC=*=C(*)CC1)=O 0.000 description 1
- LWTIGYSPAXKMDG-UHFFFAOYSA-N 2,3-dihydro-1h-imidazole Chemical compound C1NC=CN1 LWTIGYSPAXKMDG-UHFFFAOYSA-N 0.000 description 1
- HMUQGIIPSIRCIS-UHFFFAOYSA-N 3-cyclopentyl-n-(2-methoxyphenyl)propanamide Chemical compound COC1=CC=CC=C1NC(=O)CCC1CCCC1 HMUQGIIPSIRCIS-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical class OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- OKIZCWYLBDKLSU-UHFFFAOYSA-M N,N,N-Trimethylmethanaminium chloride Chemical compound [Cl-].C[N+](C)(C)C OKIZCWYLBDKLSU-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 238000007112 amidation reaction Methods 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 150000001934 cyclohexanes Chemical class 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- XVAIDCNLVLTVFM-UHFFFAOYSA-N methacetin Chemical compound COC1=CC=C(NC(C)=O)C=C1 XVAIDCNLVLTVFM-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- YMBCJWGVCUEGHA-UHFFFAOYSA-M tetraethylammonium chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC YMBCJWGVCUEGHA-UHFFFAOYSA-M 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
Definitions
- the invention relates to the oil and gas industry, in particular, to a corrosion inhibitor, including sulphide in the form of amides, which are the condensation products of anisidine or its derivatives with naphthenic acid, in aqueous, water-hydrocarbon and hydrocarbon corrosive environments with a high concentration of sulfur-containing compounds, in including hydrogen sulfide, chlorides and other aggressive factors, to protect metal equipment, pipelines from corrosion and hydrogen embrittlement, in particular, oil refining equipment, oil pipelines, gas processing equipment, gas pipelines, containers for transportation and storage of hydrocarbons, pumping equipment and valves.
- a corrosion inhibitor including sulphide in the form of amides, which are the condensation products of anisidine or its derivatives with naphthenic acid, in aqueous, water-hydrocarbon and hydrocarbon corrosive environments with a high concentration of sulfur-containing compounds, in including hydrogen sulfide, chlorides and other aggressive factors, to protect metal equipment, pipelines from corrosion and hydrogen embrittlement, in particular
- H2S hydrogen sulfide
- alkylamines C4 - C10 alkylamines C4 - C10, polyamines and imidazolines, organic ammonia derivatives such as amines (ethylamine, hexamethylenetetramine) or their salts such as tetramethylammonium chloride, tetraethylammonium chloride, a mixture of chlorides alkylbenzyldimethylammonium [A. Altsybeeva, S. Levin. Metal corrosion inhibitors. Ed. L.I. Antropova, L. Chemistry, 1968, p. 7-12, 130 and 95], on the basis of which, for quite a long time, the well-known inhibitors of hydrogen sulfide corrosion have been produced.
- organic ammonia derivatives such as amines (ethylamine, hexamethylenetetramine) or their salts such as tetramethylammonium chloride, tetraethylammonium chloride, a mixture of chlorides alky
- compositions with high inhibitory properties are being developed, based on the tertiary amine of monoalkyl phosphate, dialkyl phosphate, demulsifier, defoamer and solvent [RU 2591923 C1, publ. 20.07.2016].
- amido-imidazoline inhibitors are the most common secondary amines used to protect against hydrogen sulfide corrosion and are considered the most effective.
- the objective of the claimed invention is to develop an inhibitor of corrosion and hydrogen embrittlement, providing high anticorrosive properties in corrosive environments with a high content of hydrogen sulfide, chlorides and other corrosive factors.
- the technical result of the invention is to reduce the rate of corrosion and hydrogen embrittlement of metals in environments containing hydrogen sulfide, chlorides and other factors that increase corrosive activity.
- a solution of a corrosion and hydrogen embrittlement inhibitor is used in a solvent with a corrosion inhibitor in solution, preferably in an amount of 15-85 May. %.
- An inhibitor of corrosion and hydrogen embrittlement is used for corrosion protection of oil refining and gas processing equipment.
- An inhibitor of corrosion and hydrogen embrittlement is used for corrosion protection of oil pipelines, gas pipelines, containers for transportation and storage of hydrocarbons, pumping equipment and valves.
- the effective concentration of the inhibitor of corrosion and hydrogen embrittlement is in the range of 0.01-10,000 ppm in relation to the aggressive environment.
- amides or mixtures of amides of general formula I which are the condensation products of anisidine or its derivatives with naphthenic acid, they are used as a corrosion and hydrogen embrittlement inhibitor in aqueous, water-hydrocarbon and hydrocarbon aggressive media containing hydrogen sulfide and chloride ions; an inhibitor of corrosion and hydrogen embrittlement (amide of formula I), after which the mixture is stirred while ensuring its dissolution and / or distribution over the volume, in an effective concentration.
- the source of CI ions that stimulate corrosion are salts dissolved in the raw material, such as sodium chloride (NaCl), magnesium chloride (MgCl), calcium chloride (CaCl), etc.
- Table 1 shows some structural formulas of amides that are used as inhibitors, corresponding to the general formula I.
- the radical CH3O- in structural formulas occupies para-, ortho- or meta-positions.
- the inhibitor is used in pure form or in the form of a solution in a solvent, with its content in solution, preferably in an amount of 15-85 May. %.
- Toluene, xylene and other aromatic solvents, straight-run gasoline, kerosene, diesel and other hydrocarbon fractions, alcohols - isopropanol, isobutanol, ethanol, methanol and other alcohols are used as a solvent for the inhibitor.
- hydrocarbon and water-hydrocarbon aggressive medium can be selected: oil, oil fractions, hydrocarbon fractions, commercial products based on hydrocarbon raw materials and their derivatives, which contain or may contain water, hydrogen sulfide, sulfur compounds, chlorides and other impurities leading to corrosion of metals during storage and / or operation.
- oil, oil fractions, hydrocarbon fractions, commercial products based on hydrocarbon raw materials and their derivatives which contain or may contain water, hydrogen sulfide, sulfur compounds, chlorides and other impurities leading to corrosion of metals during storage and / or operation.
- the inhibitor is used for corrosion protection of oil refining and gas processing equipment.
- the inhibitor is used for corrosion protection of oil pipelines, gas pipelines, containers for transportation and storage of hydrocarbons, pumping equipment and valves.
- the concentration of the corrosion inhibitor is in the range of 0.01-10,000 ppm with respect to the medium, depending on its corrosivity and objectives.
- Naphthenic acids [CAS number 1338-24-5] are classified as monobasic carboxylic acids of the general formula RCOOH, where R is a naphthenic moiety composed of cyclopentane and cyclohexane derivatives.
- Naphthenic acids consist predominantly of alkyl-substituted cycloaliphatic carboxylic acids and, to a lesser extent, of acyclic aliphatic (paraffinic or fatty) acids.
- Aromatic, olefinic, hydroxy and diacid are considered minor components.
- naphthenic acids also contain varying amounts of unsaponifiable hydrocarbons, phenolic compounds, sulfur compounds, and water.
- a complex mixture of acids is obtained from straight-run petroleum distillates, mainly from kerosene and diesel fractions [J.A. Brient, P.J. Wessner and M.N. Doyle, "Naphthenic Acids” in Encyclopedia of Chemical Technology, 4th ed., Editor J. I. Kroschwitz; John Wiley & Sons: New York, 1995; Vol. 16, pp. 1017-1029].
- naphthenic acid and anisidine or its derivatives are loaded in an equimolar ratio into a reactor equipped with a mechanical stirrer, a jacket filled with a high-boiling coolant, a distillate selection system with the possibility of heating the condenser to 80 ° C and equipped with a vacuum system, in an equimolar ratio (this ratio can shift towards excess or shortage of components).
- the reaction is carried out in a nitrogen atmosphere.
- the temperature of the reactor is increased to 160 ° C and the distillation of the highly volatile fraction is started (mainly water is distilled off, which is an indicator of the course of the target reaction and a small amount of volatile organic compounds).
- the temperature of the still can be increased to 200-250 ° C until the distillation of the volatile fraction stops.
- the reaction can be carried out in a solvent.
- the completeness of the reaction is controlled by stopping the distillation of water, chromatographically using residual anisidine or its derivatives, or by IR spectrometry in descending order of the peak characteristic of naphthenic acids.
- Product quality control is carried out chromatographically by residual (unreacted) anisidine or its derivatives, or by IR spectrometry by the intensity of the characteristic peak for naphthenic acids, as well as the residual acid number.
- the inhibitor has a yellow to brown color and a honey-like consistency.
- the inhibitor has a lower nitrogen content than nitrogen-containing inhibitors available on the market.
- the resulting inhibitor is mixed with a solvent.
- a solvent toluene, xylene, alcohols, various solvents and hydrocarbon fractions.
- the resulting solutions inhibitor resistant to stratification, precipitation and other changes during long-term storage at temperatures up to minus 30 ° C and below.
- the degree of conversion of raw materials into a product is estimated by the amount of distilled water collected in a measuring container.
- the residues of unreacted raw materials (cyclopentylacetic acid, p-anisidine) are removed in vacuo.
- the reaction mixture is cooled from 160 ° C to 60 ° C and a vacuum (10 mm Hg) is created in the apparatus, unreacted raw materials are taken into the receiver, maintaining the temperature in the reactor at 60 ⁇ 5 ° C.
- the completeness of the removal of cycpopentylacetic acid from the technical product is assessed by the value of the acid number; a value of 10 or less is considered acceptable.
- Example 2 relates to the preparation of an inhibitor in the form of 3-cyclopentyl-N- (2-methoxyphenyl) propanamide [o-amide 3 (see Table 1)].
- the difference from example 1 is that the reactor is charged with 3-cyclopentylpropionic acid (CAS: 140-77-2) and o-anisidine (CAS: 90-04-0) in a ratio of 1: 1.1.
- Vacuum distillation of raw material residues is carried out after cooling the reactor to a temperature of 80 ° C at a pressure of 15 mm Hg. Art.
- the cube is heated from 100 ° C to 250 ° C.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 3 relates to the preparation of an inhibitor in the form of 4-cyclopentyl-1M- (3-methoxyphenyl) butanamide [m-amide 5 (see Table 1)].
- the difference from example 1 is that the reactor is charged with 4-cyclopentylbutanoic acid (CAS: 5732-65-0) and mansidine (CAS: 536-90-3) in a ratio of 1: 1.05.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 4 relates to the preparation of an inhibitor in the form of 1P- (4-methoxyphenyl) -M-methyl-2- (oxyhydropentalene-2-yl) acetamide [p-amide 10 (see Table 1)].
- the difference from example 1 is that 2- (1, 2, 3.3 réelle, 4,5,6, 6 réelle-octahydropentalene-2-yl) acetic acid (CAS: 1545882-23-2) and N -methyl-p-anzidine (CAS: 5961-59-1) in a ratio of 1: 1.03.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 5 relates to the preparation of an inhibitor in the form of 2-cyclohexyl-M- (2-methoxyphenyl) -N-methylacetamide [o-amide 12 (see Table 1)].
- the difference from example 1 is that the reactor is charged with 2-cyclohexylacetic acid (CAS: 5292-21-7) and N-methyl-o-anisidine (CAS: 10541-78-3) in a ratio of 1: 1.15.
- Vacuum distillation of the raw material residues is carried out after cooling the reactor to a temperature of 70 ° C at a pressure of 10 mm Hg. Art.
- the cube is heated from 100 ° C to 250 ° C.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 6 relates to the preparation of an inhibitor in the form of 2- (decahydronaphthalen-2-yl) -N- (2-methoxyphenyl) -1 ⁇ 1-methylacetamide [m-amide 14 (see Table 1)].
- the difference from example 1 is that 2- (1, 2, 3.4, 4a, 5, 6, 7, 8,8-decahydrohydronaphthalen-2-yl) acetic acid (CAS: 108019-28- 9) and N-methyl-m-anisidine (CAS: 14318-66-2) in a ratio of 1: 1.12.
- Vacuum distillation of raw material residues is carried out after cooling the reactor to a temperature of 65 ° C at a pressure of 10 mm Hg. Art.
- the cube is heated from 100 ° C to 250 ° C.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 7 relates to the preparation of an inhibitor in the form of a mixture of M- (4-methoxyphenyl) -5- (octahydro-1H-inden-2-yl) pentanamide [p-amide 15 (see Table 1)] with 1P- (2- methoxyphenyl) -5- (octahydro-1H-inden-2-yl) pentanamide [o-amide 15 (see Table 1)].
- Example 8 relates to the preparation of an inhibitor in the form of a mixture of 5- (dodecahydro-1H-fluoren-2-yl) -N- (4-methoxyphenyl) pentanamide [p-amide 17 (see Table 1)] with 5- (dodecahydro- 1H-fluoren-2-yl) -N- (3-methoxyphenyl) pentanamide [m-amide 17 (see Table 1)].
- Example 9 relates to the preparation of an inhibitor in the form of a mixture of M- (2-methoxyphenyl) -5- (tetradecahydroanthracene-2-yl) pentanamide [o-amide 19 (see Table 1)] with N- (3-methoxyphenyl) -5 - (tetradecahydroanthracene-2-yl) pentanamide [m-amide 19 (see Table 1)].
- Example 10 relates to the preparation of an inhibitor in the form of a mixture of 1 ⁇ 1- (2-methoxyphenyl) -2- (4b, 8,8,10a-tetramethyltetradecahydrophenanthren-1-yl) acetamide [o-amide 21 (see Table 1)] with T ⁇ 1- (3-methoxyphenyl) -2- (4b, 8, 8, 10 Economics-tetramethyltetradecahydrophenanthrene-1 - yl) acetamide [m-amide 21 (see Table 1)] and [ ⁇ 1- (4- methoxyphenyl) -2- (4b, 8,8,10-tetramethyltetradecahydrophenanthren-1-yl) acetamide [p-amide 21 (see Table 1)].
- Example 11 relates to the preparation of an inhibitor in the form of a mixture of N- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1)] with M- (2-methoxyphenyl) naphthenamide [o-amide 23 (see table 1) )].
- the difference from example 1 is that the reactor is charged with naphthenic acid (CAS: 1338-24-5), p-anisidine (CAS: 104-94-9) and o-anisidine (CAS: 90-04-0) in a ratio of 1.05: 0.5: 0.5.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24, presented in table. 2-4.
- Example 12 relates to the preparation of an inhibitor in the form of a mixture of N- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1)] with 1P- (3-methoxyphenyl) naphthenamide [m-amide 23 (see table 1 )].
- the difference from example 1 is that the reactor is charged with naphthenic acid (CAS: 1338-24-5), p-anisidine (CAS: 104-94-9) and m-anisidine (CAS: 536-90-3) in a ratio of 1.05: 0.5: 0.5.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24, presented in table. 2-4.
- Example 13 relates to the preparation of an inhibitor in the form of a mixture of N- (2-methoxyphenyl) naphthenamide [o-amide 23 (see table 1)] with - (3-methoxyphenyl) naphthenamide [m-amide 23 (see table 1) ].
- the difference from example 1 is that the reactor is charged with naphthenic acid (CAS: 1338-24-5), o-anisidine (CAS: 90-04-0) and m-anisidine (CAS: 536- 90-3) in a ratio of 1.05: 0.5: 0.5.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 14 relates to the preparation of an inhibitor in the form of a mixture of N- (2-methoxyphenyl) naphthenamide [o-amide 23 (see Table 1)] with N- (3-methoxyphenyl) naphthenamide [m-amide 23 (see table 1 )] and with 1M- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1)].
- Differences from example 1 is that naphthenic acid is loaded into the reactor (CAS: 1338-24-5), o-anisidine (CAS: 90-04-0), m-anisidine (CAS: 536-90-3) and p-anisidine (CAS: 104-94-9) in the ratio 1.65: 0.5: 0.5: 0.5.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24, presented in table. 2-4.
- Example 15 relates to the preparation of an inhibitor in the form of a mixture of N- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1)] with N- (4-methoxyphenyl) -N-methylnaphthenamide [p-amide 24 (see. Table 1)].
- the difference from example 1 is that naphthenic acid (CAS: 1338-24-5), p-anisidine (CAS: 104-94-9) and N-methyl-p-anzidine (CAS: 5961-59 -1) in a ratio of 1.1: 0.55: 0.55.
- the results of reducing the rate of corrosion and hydrogen embrittlement of metals are presented in table. 2-4.
- Example 16 relates to the preparation of an inhibitor in the form of a mixture of N- (2-methoxyphenyl) naphthenamide [o-amide 23 (see Table 1)] with N- (2-methoxyphenyl) -M-methylnaphthenamide [o-amide 24 (see. Table 1)].
- the difference from example 1 is that naphthenic acid (CAS: 1338-24-5), o-anisidine (CAS: 90-04-0) and N-methyl-o-anisidine (CAS: 10541-78 -3) in a ratio of 1.1: 0.55: 0.55.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24 presented in table. 2-4.
- Example 17 relates to the preparation of an inhibitor in the form of a mixture of N- (3-methoxyphenyl) naphthenamide [m-amide 23 (see Table 1)] with M- (3-methoxyphenyl) -1M-methylnaphthenamide [m-amide 24 (see. Table 1)].
- the difference from example 1 is that naphthenic acid (CAS: 1338-24-5), m-anisidine (CAS: 536-90-3) and N-methyl-m-anisidine (CAS: 14318-66 -2) in a ratio of 1, 1: 0.55: 0.55.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24 presented in table. 2-4.
- Example 18 relates to the preparation of an inhibitor in the form of a mixture of N- (4-methoxyphenyl) -M-methylnaphthenamide [p-amide 24 (see Table 1)] with M- (2-methoxyphenyl) - -methylnaphthenamide [o-amide 24 ( see Table 1)].
- the difference from example 1 is that naphthenic acid (CAS: 1338-24-5), N-methyl-p-anzidine (CAS: 5961-59-1) and N-methyl-o-anisidine (CAS : 10541-78-3) in a ratio of 1.1: 0.55: 0.55.
- the results for reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for the mixture of p-amide 23 and p-amide 24 presented in Tables 2-4.
- Example 19 Example 19
- Example 19 relates to the preparation of an inhibitor in the form of a mixture of M- (4-methoxyphenyl) -I-methylnaphthenamide [p-amide 24 (see Table 1)] with 1M- (3-methoxyphenyl) -M-methylnaphthenamide [m-amide 24 (see Table 1)].
- the difference from example 1 is that naphthenic acid (CAS: 1338-24-5), N-methyl-p-anzidine (CAS: 5961-59-1) and N-methyl-m-anisidine (CAS : 14318-66-2) in a ratio of 1.1: 0.55: 0.55.
- the results on reducing the rate of corrosion and hydrogen embrittlement of metals are similar to the results for a mixture of p-amide 23 and p-amide 24 presented in table. 2-4.
- Example 20 relates to the preparation of an inhibitor in the form of a mixture of - (4-methoxyphenyl) -N-methylnaphthenamide [p-amide 24 (see Table 1)] with N- (3-methoxyphenyl) -M-methylnaphthenamide [m-amide 24 ( see Table 1)] and M- (2-methoxyphenyl) -N-methylnaphthenamide [o-amide 24 (see Table 1)].
- p-Amides N ° N ° 3,5,7,9,11,13,15,17,19,21,23 containing the -OCH3 group in the para-position of the benzene ring were obtained as described in Example 1.
- o-Amides N ° N ° 1,5,7,9,11,13,15,17,19,21,23 containing the -OCH3 group in the ortho-position of the benzene ring were obtained according to the description given in example 2.
- m-Amides NsNs 1,3,7,9,11,13,15,17,19,21,23 containing the -OCH3 group in the meta-position of the benzene ring were obtained as described in Example 3.
- p-Amides N ° Ns 2,4,6,8,12,14,16,18,20,22,24 containing the -OCH3 group in the para-position of the benzene ring were obtained as described in Example 4.
- o-Amides NsNs 2,4,6,8,10,14,16,18,20,22,24 containing the -OCH3 group in the ortho-position of the benzene ring were obtained as described in Example 5.
- m-Amides N ° N ° 2,4,6,8,10,12,16,18,20,22,24 containing the -OCH3 group in the meta-position of the benzene ring were obtained as described in Example 6.
- Preparation of the inhibitor in the form of a mixture of two or more amides is disclosed in examples 7-20.
- an inhibitor in the form of a mixture of amides is also possible by direct mixing of the corresponding amides, previously obtained separately.
- an inhibitor in the form of a mixture of N- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1)] with N- (4-methoxyphenyl) -I-methylnaphthenamide [p-amide 24 (see Table 1 )] can be obtained according to example 15, or by mixing separately obtained N- (4-methoxyphenyl) naphthenamide [p-amide 23 (see Table 1), according to example 1] and N- (4-methoxyphenyl) - N-methylnaphthenamide [p -amide 24 (see table. 1), according to example 4].
- Amides or a mixture of amides (inhibitor) obtained by thermolysis of naphthenic acid and anisidines were introduced into an aggressive medium both individually and in a mixture with solvents (commercial form).
- the aggressive medium was a two-phase system hydrocarbon (kerosene) - distilled water (9: 1), simulating a corrosive environment at primary oil refining units.
- the aggressive medium (electrolyte) contained 450 ml of kerosene in accordance with GOST 10227-86 and 50 ml of distilled water, which was saturated with hydrogen sulfide.
- HCI and Na 2 S were introduced into distilled water, so that 1800 ppm H 2 S was formed during its hydrolysis in the liquid phase.
- the pH of the resulting solution was maintained in the range of 5.5 - 6.5 using a neutralizer such as 3-methoxypropylamine (MOPA), cyclohexylamine (CHA) monoethanolamine (MEA) or others.
- MOPA 3-methoxypropylamine
- CHA cyclohexylamine
- MEA monoethanolamine
- Samples prepared in accordance with the method were placed in an apparatus with an aggressive environment.
- the time of testing the samples in an inhibited and non-inhibited environment was 6 hours at a temperature of 60 ° C.
- the test time was counted from the moment the steel samples were placed on the environment.
- Comparative sample Ns 2 - Amide inhibitor (industrial design) at the declared 50% concentration of the active substance.
- Comparative sample Ns 4 - Imidazoline inhibitor (industrial design) at the declared 50% concentration of the active substance.
- Differences in efficiency between industrial designs and synthesized samples may be due to the different content of active substances in the solution (industrial design) from that declared in the accompanying documents or the quality of their production.
- the corrosion rate (k) in g / m 2 * h was calculated by the formula: where pt is the mass of the sample before testing, g; g is the mass of the sample after testing, g;
- S is the surface area, m 2 ; t - test time, h.
- the protective effect of the inhibitor (Z) was calculated using the formula:
- inhibitors as a rule, are used in closed-loop systems, where the medium is renewed periodically, when replaced, or they are in the recycling, as a rule, these are systems such as antifreeze, antifreeze, coolant, etc.
- the range of effective concentrations of the active substance is 0.01 - 10,000 ppm.
- the effect of the inhibitor on the corrosion protection of steel in an aqueous medium was studied by creating a model aggressive medium.
- the aggressive medium was a solution imitating the environment of a gas condensate field prepared on the basis of distilled water and the introduction of 0.5% NaCl and 0.25 g / L acetic acid (CH3COOH) at a concentration that ensures the pH of the solution is 3.4-3.6.
- CH3COOH 0.5% NaCl and 0.25 g / L acetic acid
- the effect of inhibitors on the corrosion of steels was determined by the gravimetric method by the decrease in the mass of samples on steel plates with an area (S) of 8.4 cm 2 and 18 cm 2 for St.08ps and St.70S2KhA, respectively.
- the samples were weighed on an analytical balance with an accuracy of 10 6 g.
- Corrosion tests in the liquid phase were carried out at room temperature in a U-shaped glass vessel in accordance with GOST 9.506-87 equipped with a "jacket" for heating and thermostating.
- the medium was circulated with a high-speed stirrer providing a uniform liquid flow.
- Flow rate set 1 m / s.
- the duration of the experiment was 1.5 h, and the concentration of the inhibitor in the working solution was 25 ppm and 50 ppm (25 mg / L and 50 mg / L).
- the final stage of testing was to determine the effect of the inhibitor on the protection of metals under condensation conditions, as well as to evaluate the aftereffect of the formed protective film.
- the assessment of the protective properties was carried out according to the method "Investigation of the protective properties of corrosion inhibitors under condensation conditions", developed by JSC "VNII NP”.
- the method is based on the determination of the protective effect of an inhibitor film previously formed on witness samples.
- the test conditions simulate the process of evaporation and condensation of low-boiling components of the model mixture.
- the method is not intended to determine the consumption rates of reagents when applied at industrial technological facilities.
- the research results are shown in table Ns4.
- Table No. 1 shows typical examples of the claimed corrosion inhibitors, which does not limit the invention.
- Tables 2 - 4 show the values of corrosion rates, protective effects and residual plasticity in the following sequence of the position of the SIZO radical in amides: para-position / ortho-position / meta-position.
- the concentrations are indicated in terms of the active substance, the inhibitors were administered both individually and in a mixture with solvents, mainly isopropyl alcohol, which did not affect the result.
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2003054251A2 (en) * | 2001-12-12 | 2003-07-03 | Akzo Nobel Nv | Nitrogen-containing compounds as corrosion inhibitors |
RU2667265C1 (en) * | 2018-02-05 | 2018-09-18 | Общество с ограниченной ответственностью "ИФОТОП" | Application of n,n-dimethyl-para-anisidine as inhibitor of hydrogen sulfide corrosion and hydrogen enhancing |
RU2723123C1 (en) * | 2019-05-07 | 2020-06-08 | Общество с ограниченной ответственностью «ИФОТОП» | Use of amides, which are products of condensation of anisidine or derivatives thereof with naphthenic acid as corrosion inhibitor and hydrogen embrittlement |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2003054251A2 (en) * | 2001-12-12 | 2003-07-03 | Akzo Nobel Nv | Nitrogen-containing compounds as corrosion inhibitors |
RU2667265C1 (en) * | 2018-02-05 | 2018-09-18 | Общество с ограниченной ответственностью "ИФОТОП" | Application of n,n-dimethyl-para-anisidine as inhibitor of hydrogen sulfide corrosion and hydrogen enhancing |
RU2723123C1 (en) * | 2019-05-07 | 2020-06-08 | Общество с ограниченной ответственностью «ИФОТОП» | Use of amides, which are products of condensation of anisidine or derivatives thereof with naphthenic acid as corrosion inhibitor and hydrogen embrittlement |
Non-Patent Citations (1)
Title |
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KIM, I.-H. ET AL.: "Optimization of Amide-Based Inhibitors of Soluble Epoxide Hydrolase with Improved Water Solubility", JOURNAL OF MEDICINAL CHEMISTRY, vol. 48(10, 2005, pages 3621 - 3629, XP002521393, DOI: 10.1021/JM0500929 * |
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