WO2008006855A2 - Inhibition de la corrosion dans un système d'eau de refroidissement - Google Patents

Inhibition de la corrosion dans un système d'eau de refroidissement Download PDF

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Publication number
WO2008006855A2
WO2008006855A2 PCT/EP2007/057115 EP2007057115W WO2008006855A2 WO 2008006855 A2 WO2008006855 A2 WO 2008006855A2 EP 2007057115 W EP2007057115 W EP 2007057115W WO 2008006855 A2 WO2008006855 A2 WO 2008006855A2
Authority
WO
WIPO (PCT)
Prior art keywords
cooling water
corrosion
water system
alkylalkanolamine
copper
Prior art date
Application number
PCT/EP2007/057115
Other languages
English (en)
Other versions
WO2008006855A3 (fr
Inventor
Michael D. Gernon
Conor M. Dowling
Nicholas M. Martyak
Original Assignee
Taminco
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taminco filed Critical Taminco
Publication of WO2008006855A2 publication Critical patent/WO2008006855A2/fr
Publication of WO2008006855A3 publication Critical patent/WO2008006855A3/fr

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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
    • C02F5/10—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
    • C23F11/14—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
    • 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
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/683—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of complex-forming compounds
    • 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
    • C02F2303/04—Disinfection
    • 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

Definitions

  • This present invention relates to novel methods of controlling corrosion in cooling water systems, and more particularly to certain alkylalkanolamincs which have been found to be effective for controlling corrosion of ferrous-based and copper-based metals which are in contact with cooling water systems.
  • Iron and iron-based metal alloys containing alloys such as mild steel are well- known materials used in constructing the apparatus of cooling water systems. Copper and copper-base metals also find significant use in cooling water systems. In these systems cooling water circulates, contacts the iron and/or copper based metal surfaces, and may be concentrated, such as by evaporation of a portion of the water from the system. Even though iron and copper based metals arc readily subject to corrosion in aqueous environments, they are used over other metals due to their strength and availability.
  • iron-based metals shall mean any iron metal and/or metal alloys containing iron therein.
  • copper based metal shall mean any copper metal and/or metal alloys containing copper therein.
  • Typical systems in which the iron and/or copper metal parts are subject to corrosion include evaporators, single and multi-pass heat exchangers, cooling towers, and associated equipment and the like. As the cooling water passes through or over the system, a portion of the system water evaporates thereby increasing the concentration of the dissolved materials contained in the system. These materials approach and reach a concentration at which they may cause severe pitting and corrosion which eventually requires replacement of the metal parts.
  • Various corrosion inhibitors have been previously used to treat these systems.
  • chromates, inorganic phosphates and/or polyphosphates have been used to inhibit the corrosion of metals which are in contact with water.
  • the chromates though effective, are highly toxic and consequently present handling and disposal problems.
  • phosphates are non-toxic, due to the limited solubility of calcium phosphate, it is difficult to maintain adequate concentrations of phosphates in many cooling water systems.
  • Polyphosphates are also relatively non-toxic, but tend to hydrolyzc to form orthophosphate which in turn, like phosphate itself, can create scale and sludge problems in cooling water systems (e.g. by combining with calcium in the system to form calcium phosphate).
  • excess phosphate compounds can serve as nutrient sources. Borates, nitrates, and nitrites have also been used for corrosion inhibition. These too can serve as nutrients in low concentrations, and/or represent potential health concerns at high concentrations.
  • This invention is directed to certain alkylalkanolamine compounds and to their use as corrosion control agents for treating cooling water systems.
  • the method of this invention comprises adding to a cooling water system, in an amount effective to inhibit corrosion of ferrous-based and/or copper-based metals which are in contact with the cooling water system alkylalkanolamine compounds having the following general formula:
  • the precise dosage of the corrosion inhibiting agents of this invention depends, to some extent, on the nature of the cooling water system in which it is to be incorporated and the degree of protection desired.
  • the concentration of alkylalkanolamine compounds maintained in the system preferably range from about 1.000 ppm to about 6,000 ppm. Within this range, generally lower dosages of about 2,000 ppm or less are more preferred, with a dosage of about 1 ,500 ppm or less being most preferred for many cooling water systems, such as for example, many closed recirculating cooling water systems.
  • the exact amount required with respect to a particular aqueous system can be readily determined by one of ordinary skill in the art in conventional manner.
  • the corrosion inhibiting agents of the present invention are best suited for recirculating cooling water systems, open or closed, because of the preferred treatment dosages. However, use in once through systems would recognize the corrosion protection provided by the present invention.
  • the pH is preferably maintained at 7 or above, and is most preferably maintained at 8 or above.
  • the alkylalkanolamine compounds of the present invention also provide for pH control/adjustment of the cooling water system.
  • the corrosion inhibiting compositions of this invention may be added to the system water by any convenient mode, such as by first forming a concentrated solution of the treating agent with water, preferably containing between 1 and 50 total weight percent of the alkylalkanolamine compounds.
  • treatment compositions may be added to the make-up water or feed water lines through which water enters the system.
  • an injection calibrated to deliver a predetermined amount periodically or continuously to the make-up water may be employed.
  • the present invention is particularly useful in the treatment of cooling water systems which operate at temperatures between 60 0 F and 200 0 F, particularly recirculating cooling water systems which operate at temperatures of from about 80 0 F to 150 0 F.
  • chemical corrosion inhibiting compositions of the present invention may be used as the sole corrosion inhibitor for the cooling water system
  • other conventional water treatment compositions customarily employed in cooling water systems may advantageously be used in combination with the claimed treatment agents.
  • other water treatment additives which may be used include, but are not limited to, biocides, scale inhibitors, chelants, sequestering agents, dispersing agents, other corrosion inhibitors, polymeric agents, oxygen scavengers and the like.
  • DGA diglycolamine, 2-(2-hydroxyethoxy)ethylamine
  • IPAE isopropylaminoethanol
  • the HIvB of an alkanolamine can be calculated with the following formula:
  • HLB 20[ ⁇ 60 (for monoethoxylate) or 104 (for diethoxylate)) ⁇ GMW]
  • alkanolamines having lower HLB values provide enhanced corrosion control of ferrous-based and/or copper-based metals in cooling water systems.
  • Alkanolamines having HLB values of 7 - 12 are preferred.

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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)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

L'invention concerne un procédé de contrôle de la corrosion dans des systèmes d'eau de refroidissement, lequel procédé inclut l'introduction dans le système d'eau de refroidissement de certains composés d'alkylalkanolamine ayant la formule générale : Rx-NHz-(CH2CH2OH)y où R est un groupe alkyle en C3 à C8 soit linéaire soit ramifié, x et y sont égaux à 1 ou 2, z est égal à 0 ou I, x + y n'est pas supérieur à 3, z = 3 - x - y et les groupes R sont des groupes alkyles en C3 à C8 soit identiques soit différents.
PCT/EP2007/057115 2006-07-11 2007-07-11 Inhibition de la corrosion dans un système d'eau de refroidissement WO2008006855A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81985806P 2006-07-11 2006-07-11
US60/819,858 2006-07-11

Publications (2)

Publication Number Publication Date
WO2008006855A2 true WO2008006855A2 (fr) 2008-01-17
WO2008006855A3 WO2008006855A3 (fr) 2008-05-29

Family

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PCT/EP2007/057115 WO2008006855A2 (fr) 2006-07-11 2007-07-11 Inhibition de la corrosion dans un système d'eau de refroidissement

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012021215A (ja) * 2010-07-16 2012-02-02 Kurita Water Ind Ltd ボイラ用防食剤

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578476A (en) * 1940-06-29 1946-07-01 Standard Oil Dev Co Improvement in corrosion preventive compositions
US3372009A (en) * 1964-06-18 1968-03-05 Mobil Oil Corp Liquid fuel compositions containing as anti-corrosion agent an alkyl monoalkanol amino compound
US3580847A (en) * 1967-06-16 1971-05-25 Wyandotte Chemicals Corp Hydraulic fluid
US3687611A (en) * 1969-09-25 1972-08-29 Dow Chemical Co Corrosion inhibition
US4192844A (en) * 1977-12-12 1980-03-11 Calgon Corporation Methoxypropylamine and hydrazine steam condensate corrosion inhibitor compositions and methods
GB1577923A (en) * 1977-07-13 1980-10-29 Hemlab Ag Corrosion intibitor composition
GB2084982A (en) * 1980-10-03 1982-04-21 Chemed Corp Composition and method for inhibiting corrosion
US4518512A (en) * 1982-12-29 1985-05-21 Idemitsu Kosan Company Limited Water-containing lubricant
US4711735A (en) * 1986-09-12 1987-12-08 Gulley Harold J Coolant additive with corrosion inhibitive and scale preventative properties
US4975202A (en) * 1989-02-28 1990-12-04 Betz Laboratories, Inc. Surfactant stabilizer and method for boiler water
US4976919A (en) * 1984-10-30 1990-12-11 Berol Kemi Ab Method for mechanically working cobalt-containing metal
EP0553962A1 (fr) * 1992-01-18 1993-08-04 Ciba-Geigy Ag Compositions inhibiteurs de la corrosion
EP0719734A2 (fr) * 1994-12-20 1996-07-03 Betz Europe, Inc. Polymères non-ioniques pour le traitement de l'eau de chaudière
US5958298A (en) * 1994-10-13 1999-09-28 Kao Corporation Anti-corrosive draining agent and rinsing process
EP1067214A1 (fr) * 1999-01-27 2001-01-10 Kurita Water Industries Ltd. Produit chimique de traitement des eaux et procedes correspondants
US6432890B1 (en) * 1998-09-07 2002-08-13 Ab Chem Dimension Method for mechanical working in the presence of a cobalt-containing metal
WO2004044266A1 (fr) * 2002-11-12 2004-05-27 Kurita Water Industries Ltd. Inhibiteur de corrosion metallique et inhibiteur de formation de chlorure d'hydrogene dans une unite de distillation atmospherique de petrole brut

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578476A (en) * 1940-06-29 1946-07-01 Standard Oil Dev Co Improvement in corrosion preventive compositions
US3372009A (en) * 1964-06-18 1968-03-05 Mobil Oil Corp Liquid fuel compositions containing as anti-corrosion agent an alkyl monoalkanol amino compound
US3580847A (en) * 1967-06-16 1971-05-25 Wyandotte Chemicals Corp Hydraulic fluid
US3687611A (en) * 1969-09-25 1972-08-29 Dow Chemical Co Corrosion inhibition
GB1577923A (en) * 1977-07-13 1980-10-29 Hemlab Ag Corrosion intibitor composition
US4192844A (en) * 1977-12-12 1980-03-11 Calgon Corporation Methoxypropylamine and hydrazine steam condensate corrosion inhibitor compositions and methods
GB2084982A (en) * 1980-10-03 1982-04-21 Chemed Corp Composition and method for inhibiting corrosion
US4518512A (en) * 1982-12-29 1985-05-21 Idemitsu Kosan Company Limited Water-containing lubricant
US4976919A (en) * 1984-10-30 1990-12-11 Berol Kemi Ab Method for mechanically working cobalt-containing metal
US4711735A (en) * 1986-09-12 1987-12-08 Gulley Harold J Coolant additive with corrosion inhibitive and scale preventative properties
US4975202A (en) * 1989-02-28 1990-12-04 Betz Laboratories, Inc. Surfactant stabilizer and method for boiler water
EP0553962A1 (fr) * 1992-01-18 1993-08-04 Ciba-Geigy Ag Compositions inhibiteurs de la corrosion
US5958298A (en) * 1994-10-13 1999-09-28 Kao Corporation Anti-corrosive draining agent and rinsing process
EP0719734A2 (fr) * 1994-12-20 1996-07-03 Betz Europe, Inc. Polymères non-ioniques pour le traitement de l'eau de chaudière
US6432890B1 (en) * 1998-09-07 2002-08-13 Ab Chem Dimension Method for mechanical working in the presence of a cobalt-containing metal
EP1067214A1 (fr) * 1999-01-27 2001-01-10 Kurita Water Industries Ltd. Produit chimique de traitement des eaux et procedes correspondants
WO2004044266A1 (fr) * 2002-11-12 2004-05-27 Kurita Water Industries Ltd. Inhibiteur de corrosion metallique et inhibiteur de formation de chlorure d'hydrogene dans une unite de distillation atmospherique de petrole brut

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012021215A (ja) * 2010-07-16 2012-02-02 Kurita Water Ind Ltd ボイラ用防食剤
CN103038393A (zh) * 2010-07-16 2013-04-10 栗田工业株式会社 锅炉用防腐剂
EP2594663A1 (fr) * 2010-07-16 2013-05-22 Kurita Water Industries Ltd. Anticorrosif pour chaudière
EP2594663A4 (fr) * 2010-07-16 2014-01-01 Kurita Water Ind Ltd Anticorrosif pour chaudière
US8728392B2 (en) 2010-07-16 2014-05-20 Kurita Water Industries Ltd. Method of using an amine compound as anticorrosive for a boiler
CN103038393B (zh) * 2010-07-16 2015-08-19 栗田工业株式会社 锅炉用防腐剂
KR101787457B1 (ko) 2010-07-16 2017-10-18 쿠리타 고교 가부시키가이샤 보일러용 방식제

Also Published As

Publication number Publication date
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