GB977112A - Removal of iron oxide - Google Patents

Removal of iron oxide

Info

Publication number
GB977112A
GB977112A GB7673/61A GB767361A GB977112A GB 977112 A GB977112 A GB 977112A GB 7673/61 A GB7673/61 A GB 7673/61A GB 767361 A GB767361 A GB 767361A GB 977112 A GB977112 A GB 977112A
Authority
GB
United Kingdom
Prior art keywords
dithionite
chelating agent
alkali metal
ion
x5p3o10
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
GB7673/61A
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.)
Rohm and Haas Co
Original Assignee
Rohm and Haas Co
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 Rohm and Haas Co filed Critical Rohm and Haas Co
Publication of GB977112A publication Critical patent/GB977112A/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
    • C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
    • B01J49/60—Cleaning or rinsing ion-exchange beds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

An aqueous solution for removing ferric oxide from ferrous metals or from ion-exchange materials comprises a soluble dithionite salt, e.g. an alkali metal dithionite or a chelating agent for ferrous ions such as E.D.T.A. or X5P3O10, (XPO3)6, X4P2O7 and X2HPO4 where X is an alkali-metal. The molar ratio of dithionite to chelating agent should be between 1 : 2 to 2 : 1 and the concentration of the dithionite and chelating agent may be as low as 1%. The solution may be used for treating all the well known forms of ion-exchange resins such as the sulphonic, carboxylic, amine based or quaternary ammonium based types. The inorganic natural and synthetic types such as aluminium silicate gel, zeolites and natural greensands may also be treated.ALSO:An aqueous solution for removing ferric oxide from ferrous metals or from ion exchange materials comprises a soluble dithionite salt, e.g. an alkali metal dithionite, and a chelating agent for ferrous ions such as E.D.T.A. or X5P3O10, (XPO3)6, X4P2O, and X2HPO4 where X is an alkali metal. The molar ratio of dithionite to chelating agent should be between 1 : 2 to 2 : 1 and the concentration of the dithionite and chelating agent may be as low as 1%.
GB7673/61A 1960-03-03 1961-03-02 Removal of iron oxide Expired GB977112A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1250360A 1960-03-03 1960-03-03

Publications (1)

Publication Number Publication Date
GB977112A true GB977112A (en) 1964-12-02

Family

ID=21755262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7673/61A Expired GB977112A (en) 1960-03-03 1961-03-02 Removal of iron oxide

Country Status (4)

Country Link
BE (1) BE600870A (en)
FR (1) FR1284774A (en)
GB (1) GB977112A (en)
NL (1) NL261920A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2324731A1 (en) * 1975-09-19 1977-04-15 Unilever Nv DITHIONITE COMPOSITION THAT CAN BE USED AS A CLEANING COMPOSITION
EP0052453A1 (en) * 1980-10-30 1982-05-26 Hitachi, Ltd. A process for removing crud from ion exchange resin
US5587142A (en) * 1990-04-30 1996-12-24 Arch Development Corporation Method of dissolving metal oxides with di- or polyphosphonic acid and a redundant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2324731A1 (en) * 1975-09-19 1977-04-15 Unilever Nv DITHIONITE COMPOSITION THAT CAN BE USED AS A CLEANING COMPOSITION
EP0052453A1 (en) * 1980-10-30 1982-05-26 Hitachi, Ltd. A process for removing crud from ion exchange resin
US5587142A (en) * 1990-04-30 1996-12-24 Arch Development Corporation Method of dissolving metal oxides with di- or polyphosphonic acid and a redundant

Also Published As

Publication number Publication date
NL261920A (en) 1964-05-25
FR1284774A (en) 1962-02-16
BE600870A (en) 1961-09-04

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