CA2637314A1 - Method of removing scale and acidic composition used thereof - Google Patents
Method of removing scale and acidic composition used thereof Download PDFInfo
- Publication number
- CA2637314A1 CA2637314A1 CA002637314A CA2637314A CA2637314A1 CA 2637314 A1 CA2637314 A1 CA 2637314A1 CA 002637314 A CA002637314 A CA 002637314A CA 2637314 A CA2637314 A CA 2637314A CA 2637314 A1 CA2637314 A1 CA 2637314A1
- Authority
- CA
- Canada
- Prior art keywords
- acid
- urea
- composition
- halide
- quaternary ammonium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 20
- 239000000203 mixture Substances 0.000 title claims description 18
- 230000002378 acidificating effect Effects 0.000 title claims 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 83
- 235000013877 carbamide Nutrition 0.000 claims abstract description 42
- 239000004202 carbamide Substances 0.000 claims abstract description 42
- 238000005260 corrosion Methods 0.000 claims abstract description 29
- 230000007797 corrosion Effects 0.000 claims abstract description 29
- 239000003112 inhibitor Substances 0.000 claims abstract description 15
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims abstract description 12
- 150000004820 halides Chemical class 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- -1 aryl quinolinium halide Chemical class 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 8
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 claims description 6
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- GFEJZIULYONCQB-UHFFFAOYSA-M 1-benzylquinolin-1-ium;chloride Chemical compound [Cl-].C=1C=CC2=CC=CC=C2[N+]=1CC1=CC=CC=C1 GFEJZIULYONCQB-UHFFFAOYSA-M 0.000 claims 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims 2
- 239000003349 gelling agent Substances 0.000 claims 1
- 125000001453 quaternary ammonium group Chemical group 0.000 claims 1
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- 150000003868 ammonium compounds Chemical class 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PSXRWZBTVAZNSF-UHFFFAOYSA-N hydron;quinoline;chloride Chemical compound Cl.N1=CC=CC2=CC=CC=C21 PSXRWZBTVAZNSF-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- OWRMDCIUPFNLRR-UHFFFAOYSA-M 1-cyclohexylpyridin-1-ium;bromide Chemical compound [Br-].C1CCCCC1[N+]1=CC=CC=C1 OWRMDCIUPFNLRR-UHFFFAOYSA-M 0.000 description 1
- GKQHIYSTBXDYNQ-UHFFFAOYSA-M 1-dodecylpyridin-1-ium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+]1=CC=CC=C1 GKQHIYSTBXDYNQ-UHFFFAOYSA-M 0.000 description 1
- KWOPWPWSHCGQMK-UHFFFAOYSA-M 1-dodecylquinolin-1-ium;bromide Chemical compound [Br-].C1=CC=C2[N+](CCCCCCCCCCCC)=CC=CC2=C1 KWOPWPWSHCGQMK-UHFFFAOYSA-M 0.000 description 1
- LNKPCMOUFKLBCM-UHFFFAOYSA-M 1-octylpyridin-1-ium;bromide Chemical compound [Br-].CCCCCCCC[N+]1=CC=CC=C1 LNKPCMOUFKLBCM-UHFFFAOYSA-M 0.000 description 1
- SIHFYNZIBKOFFK-UHFFFAOYSA-N 1-tetradecylpyridin-1-ium Chemical compound CCCCCCCCCCCCCC[N+]1=CC=CC=C1 SIHFYNZIBKOFFK-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229940112041 peripherally acting muscle relaxants other quaternary ammonium compound in atc Drugs 0.000 description 1
- 229960004838 phosphoric acid Drugs 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QGVNJRROSLYGKF-UHFFFAOYSA-N thiobarbital Chemical compound CCC1(CC)C(=O)NC(=S)NC1=O QGVNJRROSLYGKF-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 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
- 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
- C23F14/00—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes
- C23F14/02—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes by chemical means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/086—Condensed phosphates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
-
- 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
-
- 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
- C23F11/141—Amines; Quaternary ammonium 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
- 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
- C23F11/145—Amides; N-substituted amides
-
- 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
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
-
- 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
- C23G1/061—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors nitrogen-containing 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
- C23G1/10—Other heavy metals
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The corrosion inhibiting activity of quaternary ammonium compounds is enhanced by the addition of a carbamide, specifically urea, in particular, the aryfquinoiinium halide corrosion inhibitor's activity with respect to a galvanized surface is significantly enhanced by the addition of the urea.
Description
ENHANCED GAL1iANIZEa CORROSION lNH1BITOR
BACKGROUND OF THE INVENTION
Corrosion inhibitors are used for a variety of different applications. Certain corrosion inhibitors are particufarly suited for preventing corrosion of different metals, such as steel, copper and galvanized coatings.
In rnan:y process water systems such as boilers and cooling towers, scale deposits present a significant concern. These scale deposits can inhibit heat exchange and/Qrwaterflow. Acids can be used to dissolve the scale. Htiwever,- the acids generaily prornote corrosion. To deal with this, corrosion inhibitors have been added to the water in the process water systems. Quatemary ammonium compounds have been used as, corrosion irthibitars and, iti particufar; to reduce.corrosion of galvanized inetal surfaces.
SUMMARY OF THE INVENTION.
The present . invention is premised on . the realization thaf corrosion in.h'ibition provided by quaternary ammortium compounds can be.
15. 'enhanced by the additicin of a.water solUble carbamide and, in particular, urea. Urea. in. combination in+ith, for exarnple, ar1 aryl quaternary ammonium compound, such as a quinolium hafide, provfdes significantly greater corrosion inhibitor than the quaternary ammonium compound itself.
The objects and advantages of the present invention will be further appreciated in ffght of the following detailed d6scription.
l7ETAILED DESCRIPTION OF THE INVENTION
A corrosion-inhibiting composition includes a quaternary atnmonium corrosion inhibitor in combination with a carbamide. When used as a scale remover, an acid is included.
The corrosion inhibitor comprises a composition including a quaternary arnmonium compound of the general formula (R)4 N{X' wherein the R's represent the same or dffFerent long chain alkyl, cycloalkyl, aryl or heterocyclic groups, and X represents an anion such as, for example, a halide. Exaxnples of such compounds include N-alkyl, N-cycloalkyl and N-alkyiaryl pyridinium halides such as N-cyclohexylpyridinium bromide, N-octylpyridinium bromide, N-dadecyipyridinium bromide, N,N-didodecyfdipyridinium dibmmide, N-tetradecylpyridinium . bromide, N-laurylpyridinium chloride, N-dodecylbenzylpyridinium chioride, N-dodecylquinolinium bromide. N-(1-methyinapthyf)quinolinium chloride, N-benzyl.)quinolinium chloride and the like. * Other quaternary ammonium compounds include monochloromethylated and bischioromethylated pyridinkfm hafides, ethoxyfated.arid- propoxylated quaternary ammonium compounds; didodecyidimetfiyf.ammonium chloride, hexad=ecyiethyfdimethylammonium chloride, 2-hydroxy-S-(2-undecylamidoethylamino)-propane-l-triethylammonium hydroxide, -2-hydroxy-3-(2-heptadecylamidoethytamino)-propane-l-triethyIammonium hydroxide, 2-hydroxy-3-(2-heptadecylamidoethylamino)-propane-l-triethyiammonium hydroxide, and the like.
The preferred cdrrosion inhibitor of the present invention is an aryl quaternary ammonium compourid and, in particuiar, an aryl quinolinium haiide, and, in particular 1-benzyiquiriofinium halide. Generally, this is the chloride. This particular product is commerciaEiy availabie. under the trade name Dodfcor 2565.
The corrosion inhibitor is combined with a carbamide. Any water soluble carbamide will be useful in the present invention. The primary and least expensive water soluble carbamide available for use is urea.
The ratio of the quatemary ammonium compound to urea compound will be about 3:1 to 1:3 by weight. Generapy, there.wili be slight excess of the urea When the present formulation is used to remove scale, the composition will include an acid. Generaiiy, any organic or inorganic acid can be used. . Suitabfe acids include lactic acid, sulfamic acid, giycotic acid, citric =.
acid; hydr chloric acid, phosphoric acid and methane sulfonic acid. These -are all siuitable for use in boilers and cooling towers. The concentrated scale -remover will typically include 2-20% by weight acid, .1-25 lo quatemary'....
...
ammonium compound, and 1-20% by weight of the carbamide or urea.
The corrosion inh'tbitor without the acid is formed by rnixing the .individual components in water. The order of addition is not significant:
Heating is not required. The scale remover is formulated by adding+ the corrosion inhibitor to the acid with stirring. The urea is then added with additional stirring.
The preferred scale remover is methane sulfonic acid 75%
(70% alrtive), Dodecor 256515% (about 30% active), and urea 10%. These are added to the water in a process watersystem at a concentration effective for the acid to remove scale. Generally, the concentration in a water system will be about 2-20% of system volume. This solution is circulated with the water and can be added as needed.
The present invention can also be used to provide a cleaning gel wherein an acid is combined with a thickener, the urea and the quaternaryammonium compound. in this embodiment, the thickenirlg atgent, preferably a cationic surfactant thickening agent, is added to enable the product to adhere to a vertical surface, generally 200 to 6000 cps. The acid dissolvesthe white rust whilethe urea and quaternary ammoniurn compound reduce zinc corrosion.
An exemplary composition is shown below. This productvvould be used as a white rust removal agent, for cooling towers at 100%. The cooling tower is &ained first. The gel ts then appiied as a spray onto, the galvanized surface to remove #he white rusf, which is zi.nc carbonate or zinc hydroxide. 'This is rinsed- ofiF:after-.the -white rust has been substantially dissolvQd; genetally about a.p-hour. This-permits the use of about 1/20th of: --the amount of chemical r.equired in a typical white rust removal process. -Hydrochloric Acid 19.0000 Water 64.9975 Acid Thickener 3.0000 Urea 9.0000 Dodicor 4.0000 A(phazurine FGND (conc.) 0.0025 This invention wili be further appreciated in light of the following detaifed example.
EXAMPLE
To demonstrate the efficacy of the present invention, five different 10% lactic acid solutions were prepared. The first contained 5%
DodicorV2565 and 8.5% urea; the second 10% Dodicor and 8.4% urea; the third 14:8% Dodicor and 8.4% urea; the fourth 23% Dodicor with no urea, and the fifth no Dodicor and 10% urea. These solutions were then tested to determine corrosion of galvanized metal with the.results provided in terms of mils per test (mpt). In this test, 8 gallons of water per minute at '120 F was circcufated av*er a ga[vanized coupori for 8 hours. The mils per year (mpy) represents an extrapolatiori of the mpt data.
As shbv,rn in the Tabie, the mpt for the urea by itself was 15, whlch, effecfively., pravided no corrosion in}iibit3on. Th6 Dodicor by itself had ari `mpf of :The cc-rribinations of urea and Dodicor had rnpts of :9 1=. i 9:
aiid .35, respectively.
. ..: :. :: . :.. . . ....
This=test demanstrated that the addition of urea snablsd'one .
to effectiveiy cutthe concentration of Dadicor in half and double the corrosion inhibition. Even with only 5% Dodicor,and 8.4 l0 . urea; the rnpt was..
BACKGROUND OF THE INVENTION
Corrosion inhibitors are used for a variety of different applications. Certain corrosion inhibitors are particufarly suited for preventing corrosion of different metals, such as steel, copper and galvanized coatings.
In rnan:y process water systems such as boilers and cooling towers, scale deposits present a significant concern. These scale deposits can inhibit heat exchange and/Qrwaterflow. Acids can be used to dissolve the scale. Htiwever,- the acids generaily prornote corrosion. To deal with this, corrosion inhibitors have been added to the water in the process water systems. Quatemary ammonium compounds have been used as, corrosion irthibitars and, iti particufar; to reduce.corrosion of galvanized inetal surfaces.
SUMMARY OF THE INVENTION.
The present . invention is premised on . the realization thaf corrosion in.h'ibition provided by quaternary ammortium compounds can be.
15. 'enhanced by the additicin of a.water solUble carbamide and, in particular, urea. Urea. in. combination in+ith, for exarnple, ar1 aryl quaternary ammonium compound, such as a quinolium hafide, provfdes significantly greater corrosion inhibitor than the quaternary ammonium compound itself.
The objects and advantages of the present invention will be further appreciated in ffght of the following detailed d6scription.
l7ETAILED DESCRIPTION OF THE INVENTION
A corrosion-inhibiting composition includes a quaternary atnmonium corrosion inhibitor in combination with a carbamide. When used as a scale remover, an acid is included.
The corrosion inhibitor comprises a composition including a quaternary arnmonium compound of the general formula (R)4 N{X' wherein the R's represent the same or dffFerent long chain alkyl, cycloalkyl, aryl or heterocyclic groups, and X represents an anion such as, for example, a halide. Exaxnples of such compounds include N-alkyl, N-cycloalkyl and N-alkyiaryl pyridinium halides such as N-cyclohexylpyridinium bromide, N-octylpyridinium bromide, N-dadecyipyridinium bromide, N,N-didodecyfdipyridinium dibmmide, N-tetradecylpyridinium . bromide, N-laurylpyridinium chloride, N-dodecylbenzylpyridinium chioride, N-dodecylquinolinium bromide. N-(1-methyinapthyf)quinolinium chloride, N-benzyl.)quinolinium chloride and the like. * Other quaternary ammonium compounds include monochloromethylated and bischioromethylated pyridinkfm hafides, ethoxyfated.arid- propoxylated quaternary ammonium compounds; didodecyidimetfiyf.ammonium chloride, hexad=ecyiethyfdimethylammonium chloride, 2-hydroxy-S-(2-undecylamidoethylamino)-propane-l-triethylammonium hydroxide, -2-hydroxy-3-(2-heptadecylamidoethytamino)-propane-l-triethyIammonium hydroxide, 2-hydroxy-3-(2-heptadecylamidoethylamino)-propane-l-triethyiammonium hydroxide, and the like.
The preferred cdrrosion inhibitor of the present invention is an aryl quaternary ammonium compourid and, in particuiar, an aryl quinolinium haiide, and, in particular 1-benzyiquiriofinium halide. Generally, this is the chloride. This particular product is commerciaEiy availabie. under the trade name Dodfcor 2565.
The corrosion inhibitor is combined with a carbamide. Any water soluble carbamide will be useful in the present invention. The primary and least expensive water soluble carbamide available for use is urea.
The ratio of the quatemary ammonium compound to urea compound will be about 3:1 to 1:3 by weight. Generapy, there.wili be slight excess of the urea When the present formulation is used to remove scale, the composition will include an acid. Generaiiy, any organic or inorganic acid can be used. . Suitabfe acids include lactic acid, sulfamic acid, giycotic acid, citric =.
acid; hydr chloric acid, phosphoric acid and methane sulfonic acid. These -are all siuitable for use in boilers and cooling towers. The concentrated scale -remover will typically include 2-20% by weight acid, .1-25 lo quatemary'....
...
ammonium compound, and 1-20% by weight of the carbamide or urea.
The corrosion inh'tbitor without the acid is formed by rnixing the .individual components in water. The order of addition is not significant:
Heating is not required. The scale remover is formulated by adding+ the corrosion inhibitor to the acid with stirring. The urea is then added with additional stirring.
The preferred scale remover is methane sulfonic acid 75%
(70% alrtive), Dodecor 256515% (about 30% active), and urea 10%. These are added to the water in a process watersystem at a concentration effective for the acid to remove scale. Generally, the concentration in a water system will be about 2-20% of system volume. This solution is circulated with the water and can be added as needed.
The present invention can also be used to provide a cleaning gel wherein an acid is combined with a thickener, the urea and the quaternaryammonium compound. in this embodiment, the thickenirlg atgent, preferably a cationic surfactant thickening agent, is added to enable the product to adhere to a vertical surface, generally 200 to 6000 cps. The acid dissolvesthe white rust whilethe urea and quaternary ammoniurn compound reduce zinc corrosion.
An exemplary composition is shown below. This productvvould be used as a white rust removal agent, for cooling towers at 100%. The cooling tower is &ained first. The gel ts then appiied as a spray onto, the galvanized surface to remove #he white rusf, which is zi.nc carbonate or zinc hydroxide. 'This is rinsed- ofiF:after-.the -white rust has been substantially dissolvQd; genetally about a.p-hour. This-permits the use of about 1/20th of: --the amount of chemical r.equired in a typical white rust removal process. -Hydrochloric Acid 19.0000 Water 64.9975 Acid Thickener 3.0000 Urea 9.0000 Dodicor 4.0000 A(phazurine FGND (conc.) 0.0025 This invention wili be further appreciated in light of the following detaifed example.
EXAMPLE
To demonstrate the efficacy of the present invention, five different 10% lactic acid solutions were prepared. The first contained 5%
DodicorV2565 and 8.5% urea; the second 10% Dodicor and 8.4% urea; the third 14:8% Dodicor and 8.4% urea; the fourth 23% Dodicor with no urea, and the fifth no Dodicor and 10% urea. These solutions were then tested to determine corrosion of galvanized metal with the.results provided in terms of mils per test (mpt). In this test, 8 gallons of water per minute at '120 F was circcufated av*er a ga[vanized coupori for 8 hours. The mils per year (mpy) represents an extrapolatiori of the mpt data.
As shbv,rn in the Tabie, the mpt for the urea by itself was 15, whlch, effecfively., pravided no corrosion in}iibit3on. Th6 Dodicor by itself had ari `mpf of :The cc-rribinations of urea and Dodicor had rnpts of :9 1=. i 9:
aiid .35, respectively.
. ..: :. :: . :.. . . ....
This=test demanstrated that the addition of urea snablsd'one .
to effectiveiy cutthe concentration of Dadicor in half and double the corrosion inhibition. Even with only 5% Dodicor,and 8.4 l0 . urea; the rnpt was..
comparable to 23% odicor by itself. Thus, the present invention allows one to reduce the amount of corrosion inhibitor and improve corrosion inhibition by the addition of the carbamide. This significantly reduces cost and improves efficacy.
TABLE
mpy mpt % Dodicar % Urea 383.25 0.35 5 8.4 120.45 0.11 10 8.4 120.45 0.11 14.8 8.4 240.9 0.22 23 0 16,425 15 0 10 This has been a description of the present invention along with the preferred method of practicing the present invention. However, the invention itself should only be defined by the appended claims, WHEREIN
1 a WE CLAIM:
TABLE
mpy mpt % Dodicar % Urea 383.25 0.35 5 8.4 120.45 0.11 10 8.4 120.45 0.11 14.8 8.4 240.9 0.22 23 0 16,425 15 0 10 This has been a description of the present invention along with the preferred method of practicing the present invention. However, the invention itself should only be defined by the appended claims, WHEREIN
1 a WE CLAIM:
Claims (24)
1. A method of removing scale on a surface comprising applying to said surface an acidic composition comprising an acid, a quaternary ammonium corrosion inhibitor and a water soluble carbamide.
2. The method claimed in claim 1 wherein said quaternary ammonium compound is an arylquinolinium halide.
3. The method claimed in claim 2 wherein said aryl quinolinium halide is 1-benzyiquinolinium halide.
4. The method claimed in claim 1 wherein said carbamide is urea.
5. The method claimed in claim 1 wherein said acid is selected from the group consisting of lactic acid, sulfamic acid, glycolic acid, citric acid, hydrochloric acid, phosphoric acid and methane sulfonic acid.
6. The method claimed in claim 1 wherein said surface is on a boiler and said acidic composition is circulated through said boiler.
7. The method claimed in claim 1 wherein said surface is on a cooling tower and said acidic composition is circulated through said cooling tower.
8. A corrosion inhibitor comprising an aryl quaternary ammonium compound in combination with urea.
9. The composition claimed in claim 8 wherein the ratio of quaternary ammonium compound to urea is from 1:3 to 3:1 by weight.
10. The composition claimed in claim 9 wherein said quaternary ammonium compound is an arylquinolinium halide.
11. The composition claimed in claim 9 wherein said quaternary ammonium compound is 1-benzylquinolinium halide.
12. The composition claimed in claim 8 further comprising an acid.
13. The composition claimed in claim 14 further comprising a thickening agent.
14. The method of preventing corrosion on a galvanic surface comprising applying to said galvanic surface a composition comprising 1-benzylquinolinium chloride in combination with urea.
15. The method claimed in claim 1 wherein said ratio of 1-benzylquinolinium chloride to urea is from about 1:3 to 3:1 by weight.
16. A method of removing white rust from galvanized surfaces of a cooling tower comprising draining water from said cooling tower, applying an acidic gel to said galvanic surfaces for a period of time sufficient to dissolve said white rust wherein said acidic gel comprises a gelling agent, and acid and a corrosion inhibitor.
17. The method claimed in claim 16 wherein said corrosion inhibitor comprises a quaternary ammonium compound in combination with urea.
18. The method claimed in claim 17 wherein said quaternary ammonium compound is benzylquinolinium halide.
19. The method claimed in claim 18 wherein the ratio of urea to benzylquinolinium halide is from 1:3 to about 3:3 by weight.
20. The method claimed in claim 19 further comprising rinsing said acidic gel from said galvanic surface.
21. A gel for removing white rust comprising an acid, an acid thickener, urea and a quaternary ammonium compound.
22. The composition claimed in claim 21 wherein said quaternary ammonium compound comprises an arylquinolinium halide.
23. The composition claimed in claim 22 wherein said arylquinolinium halide is a benzylquinolinium halide.
24. The composition claimed in claim 23 wherein the ration of urea to benzylquinolinium halide is from 1:3 to 3:3 by weight.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/333,155 | 2006-01-17 | ||
| US11/333,155 US20070164258A1 (en) | 2006-01-17 | 2006-01-17 | Enhanced galvanized corrosion inhibitor |
| PCT/US2006/062023 WO2007087099A2 (en) | 2006-01-17 | 2006-12-13 | Method of removing scale and acidic composition used thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2637314A1 true CA2637314A1 (en) | 2007-08-02 |
Family
ID=37831842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002637314A Abandoned CA2637314A1 (en) | 2006-01-17 | 2006-12-13 | Method of removing scale and acidic composition used thereof |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070164258A1 (en) |
| CA (1) | CA2637314A1 (en) |
| MX (1) | MX2008009193A (en) |
| WO (1) | WO2007087099A2 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2939146B1 (en) | 2008-11-28 | 2012-11-16 | Arkema France | USE OF ALKANE SULFONIC ACID FOR RUST REMOVAL |
| ES2708173T3 (en) * | 2009-06-25 | 2019-04-09 | Henkel Ag & Co Kgaa | Formulation of metal loss inhibitor and processes |
| SI2348142T1 (en) * | 2010-01-25 | 2019-03-29 | Westinghouse Electric Company Llc | Method and composition for removing scale deposits formed on a metal surface within a steam generating system |
| CA3075329C (en) | 2010-01-26 | 2022-11-01 | Dominion Engineering, Inc. | Method and composition for removing deposits |
| CN101892489B (en) * | 2010-07-23 | 2012-11-07 | 广州唯普电力科技有限公司 | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof |
| FR3004460B1 (en) * | 2013-04-16 | 2015-04-17 | Cba World S A Rl | PRODUCT FOR THE REMOVAL OF RESIDUES FROM INSOLUBLE CALCIUM SALTS. |
| US20150034315A1 (en) * | 2013-07-31 | 2015-02-05 | Schlumberger Technology Corporation | Viscosified acid fluid and method for use thereof |
| CA2866658A1 (en) * | 2014-10-02 | 2016-04-02 | Fluid Energy Group Ltd. | Synthetic acid compositions alternatives to conventional acids in the oil and gas industry |
| CN104761065A (en) * | 2015-04-24 | 2015-07-08 | 张萍 | Descaling agent |
| CA2892895A1 (en) | 2015-05-28 | 2016-11-28 | Fluid Energy Group Ltd. | Novel organic acid compositions for use in the oil and gas industry |
| CA2892877A1 (en) * | 2015-05-28 | 2016-11-28 | Fluid Energy Group Ltd. | Using non-regulated synthetic acid compositions as alternatives to conventional acids in the oil and gas industry |
| US10683576B2 (en) * | 2017-03-27 | 2020-06-16 | Baker Hughes, A Ge Company, Llc | Corrosion inhibitors for passivation of galvanized coatings and carbon steel |
| FR3079528A1 (en) * | 2018-03-29 | 2019-10-04 | Suez Groupe | PROCESS FOR PREVENTING THE FORMATION OF WHITE RUST ON A ZINC-COATED STEEL SURFACE |
| CN109183048A (en) * | 2018-11-13 | 2019-01-11 | 中化化工科学技术研究总院有限公司 | A kind of hydrochloric acid high temperature corrosion-retarding fog inhibitor and its application method |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1039187A (en) * | 1963-06-26 | 1966-08-17 | Dow Chemical Co | A method for removing scale from metallic surfaces |
| US3345296A (en) * | 1964-02-28 | 1967-10-03 | Fmc Corp | Corrosion inhibition |
| US3335085A (en) * | 1964-04-08 | 1967-08-08 | Calgon Corp | Inhibiting corrosion by acids |
| US3356526A (en) * | 1964-05-13 | 1967-12-05 | Armour & Co | Method of preparing water-dispersible softener compositions and products produced thereby |
| NL155315B (en) * | 1964-06-09 | 1977-12-15 | Ver Kunstmestfabriekn Mekog Al | PROCEDURE FOR CLEANING IRONS OR STEEL, INTERNAL SURFACES OF INDUSTRIAL EQUIPMENT |
| US3332871A (en) * | 1966-06-27 | 1967-07-25 | Myron L Robinson | Water treatment |
| US3634270A (en) * | 1969-06-20 | 1972-01-11 | Dow Chemical Co | Inhibitor |
| US3779935A (en) * | 1971-07-12 | 1973-12-18 | Exxon Research Engineering Co | Inhibition of corrosion |
| US4025359A (en) * | 1974-04-01 | 1977-05-24 | Connelly Jr George F | Inhibited acid composition for cleaning water systems |
| US3985671A (en) * | 1974-09-26 | 1976-10-12 | Universal Oil Products Company | Scale control agents |
| US4138276A (en) * | 1976-03-01 | 1979-02-06 | J. M. Eltzroth & Associates, Inc. | Coating compositions |
| JPH03500416A (en) * | 1988-07-29 | 1991-01-31 | エス・アール・アイ・インターナシヨナル | Cooperative corrosion inhibitors based on substituted pyridinium compounds |
| GB8915815D0 (en) * | 1989-07-11 | 1989-08-31 | Warwick Int Ltd | Scale inhibition |
| GB9312881D0 (en) * | 1993-06-22 | 1993-08-04 | Jefferson Roger L | Boiler treatment and novel compounds therfor |
| US5697443A (en) * | 1996-02-09 | 1997-12-16 | Halliburton Energy Services, Inc. | Method and composition for acidizing subterranean formations utilizing corrosion inhibitor intensifiers |
| GB0017675D0 (en) * | 2000-07-20 | 2000-09-06 | Rhodia Cons Spec Ltd | Treatment of iron sulphide deposits |
| US6866797B1 (en) * | 2000-08-03 | 2005-03-15 | Bj Services Company | Corrosion inhibitors and methods of use |
-
2006
- 2006-01-17 US US11/333,155 patent/US20070164258A1/en not_active Abandoned
- 2006-12-13 CA CA002637314A patent/CA2637314A1/en not_active Abandoned
- 2006-12-13 MX MX2008009193A patent/MX2008009193A/en not_active Application Discontinuation
- 2006-12-13 WO PCT/US2006/062023 patent/WO2007087099A2/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007087099A2 (en) | 2007-08-02 |
| WO2007087099A3 (en) | 2008-02-21 |
| US20070164258A1 (en) | 2007-07-19 |
| MX2008009193A (en) | 2008-09-10 |
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