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GB1397451A - Descaling formulations - Google Patents

Descaling formulations

Info

Publication number
GB1397451A
GB1397451A GB4640272A GB4640272A GB1397451A GB 1397451 A GB1397451 A GB 1397451A GB 4640272 A GB4640272 A GB 4640272A GB 4640272 A GB4640272 A GB 4640272A GB 1397451 A GB1397451 A GB 1397451A
Authority
GB
United Kingdom
Prior art keywords
phosphonate
ammonium
salt
descaling
cation
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.)
Expired
Application number
GB4640272A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Ltd
Original Assignee
Monsanto Ltd
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 Monsanto Ltd filed Critical Monsanto Ltd
Priority to GB4640272A priority Critical patent/GB1397451A/en
Priority to NL7313474A priority patent/NL7313474A/xx
Priority to FR7335313A priority patent/FR2202145B1/fr
Priority to AU60951/73A priority patent/AU493810B2/en
Priority to BE136317A priority patent/BE805633A/en
Priority to ES419302A priority patent/ES419302A1/en
Priority to CA182,784A priority patent/CA995567A/en
Priority to IT5299273A priority patent/IT997882B/en
Priority to DE19732350417 priority patent/DE2350417A1/en
Priority to JP11317473A priority patent/JPS49133701A/ja
Publication of GB1397451A publication Critical patent/GB1397451A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel
    • 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
    • C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

1397451 Descaling metal surfaces MONSANTO Ltd 11 Sept 1973 [9 Oct 1972] 46402/72 Heading C7E Iron and Cu oxides are removed, e.g. from boiler pipes, using an aq. solution of pH # 7À0 containing an aliphatic phosphonate and an inorganic NH 4 salt. The phosphonate may contain a group where Y and Y' are each H or C 1-4 alkyl, R and R' are each H, an esterifying group or a cation (e.g. alkali metal, NH 4 , Zn or an amine cation) such that the compound is water soluble to pH # 7À0, and the C atom is attached to the N of ammonia or an aliphatic mono- or diamine e.g. ethylene or hexamethylene diamine. Specified phosphonates are ammonium 1-hydroxyethylidene-1,1- disphosphonate and ammonium aminotri (methylene phosphonate). The NH4 salt may be the chloride, bromide, nitrate, sulphate, carbonate, persulphate, sulphamate, nitrite, or a phosphate. Other additives include H 2 O 2 , persulphates, sulphites and hydrazine.
GB4640272A 1972-10-09 1972-10-09 Descaling formulations Expired GB1397451A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB4640272A GB1397451A (en) 1972-10-09 1972-10-09 Descaling formulations
NL7313474A NL7313474A (en) 1972-10-09 1973-10-01
FR7335313A FR2202145B1 (en) 1972-10-09 1973-10-03
AU60951/73A AU493810B2 (en) 1972-10-09 1973-10-03 Descaling formulations comprising aliphatic phosphonates and inorganic ammonium salts
BE136317A BE805633A (en) 1972-10-09 1973-10-03 DESCALING PRODUCT
ES419302A ES419302A1 (en) 1972-10-09 1973-10-03 Descaling formulations
CA182,784A CA995567A (en) 1972-10-09 1973-10-05 Method and compositions for removing metal oxide deposits
IT5299273A IT997882B (en) 1972-10-09 1973-10-08 DESCALING COMPOSITIONS
DE19732350417 DE2350417A1 (en) 1972-10-09 1973-10-08 FORMULATIONS FOR THE REMOVAL OF STEEL
JP11317473A JPS49133701A (en) 1972-10-09 1973-10-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4640272A GB1397451A (en) 1972-10-09 1972-10-09 Descaling formulations

Publications (1)

Publication Number Publication Date
GB1397451A true GB1397451A (en) 1975-06-11

Family

ID=10441109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4640272A Expired GB1397451A (en) 1972-10-09 1972-10-09 Descaling formulations

Country Status (9)

Country Link
JP (1) JPS49133701A (en)
BE (1) BE805633A (en)
CA (1) CA995567A (en)
DE (1) DE2350417A1 (en)
ES (1) ES419302A1 (en)
FR (1) FR2202145B1 (en)
GB (1) GB1397451A (en)
IT (1) IT997882B (en)
NL (1) NL7313474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6348440B1 (en) 2000-08-02 2002-02-19 Betzdearborn Inc. Method of cleaning a metal surface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078894A (en) * 1990-04-30 1992-01-07 Arch Development Corporation Formulations for iron oxides dissolution

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336221A (en) * 1964-11-05 1967-08-15 Calgon Corp Method of inhibiting precipitation and scale formation
CA790610A (en) * 1965-12-28 1968-07-23 T. Quimby Oscar Diphosphonate compounds and detergent compositions
GB1345518A (en) * 1970-02-20 1974-01-30 Albright & Wilson Phosphonate sequestrant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6348440B1 (en) 2000-08-02 2002-02-19 Betzdearborn Inc. Method of cleaning a metal surface

Also Published As

Publication number Publication date
JPS49133701A (en) 1974-12-23
BE805633A (en) 1974-04-03
ES419302A1 (en) 1976-02-16
IT997882B (en) 1975-12-30
FR2202145A1 (en) 1974-05-03
FR2202145B1 (en) 1976-11-19
AU6095173A (en) 1975-04-10
CA995567A (en) 1976-08-24
NL7313474A (en) 1974-04-11
DE2350417A1 (en) 1974-05-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee