GB762609A - Method of treating boiler feed water - Google Patents

Method of treating boiler feed water

Info

Publication number
GB762609A
GB762609A GB11146/54A GB1114654A GB762609A GB 762609 A GB762609 A GB 762609A GB 11146/54 A GB11146/54 A GB 11146/54A GB 1114654 A GB1114654 A GB 1114654A GB 762609 A GB762609 A GB 762609A
Authority
GB
United Kingdom
Prior art keywords
monohydrazine
hydrazine
orthophosphate
orthophosphite
dihydrazine
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
GB11146/54A
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Publication of GB762609A publication Critical patent/GB762609A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/16—Hydrazine; Salts thereof
    • 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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C23F11/18—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 inorganic inhibitors
    • C23F11/187—Mixtures of inorganic inhibitors
    • C23F11/188—Mixtures of inorganic inhibitors containing phosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)

Abstract

Hydrazine salts of phosphorus acids and of partial esters of phosphorus acids are used for deaerating boiler feed water. Salts specified are monohydrazine metaphosphate, monohydrazine dihypophosphite, tetrahydrazine pyrophosphate, dihydrazine pyrophosphate, monohydrazine orthophosphate, monohydrazine orthophosphite, dihydrazine orthophosphite and hydrazine methyl, isopropyl and butyl orthophosphate, the first four of which are alleged to be novel. The salts may generally be prepared by interacting hydrazine or hydrazine hydrate with a phosphorus acid in the presence of an organic solvent medium, for example methanol or ethanol. Monohydrazine metaphosphate may be prepared by dehydrating monohydrazine orthophosphate, for example by heating to 160-170 DEG C. under a pressure of 10 in. of Hg for 8 hours.ALSO:Dissolved oxygen is removed from boiler feed water by adding thereto, preferably after deaeration, a hydrazine salt of a phosphorus acid or of an organic partial ester of a phosphorus acid. An excess of 150-200 per cent of hydrazine salt is preferably employed. Salts specified are monohydrazine metaphosphate, monohydrazine dihypophosphite, tetrahydrazine pyrophosphate dihydrazine pyrophosphate, monohydrazine orthophosphate, monohydrazine orthophosphite, dihydrazine orthophosphite and hydrazine methyl, isopropyl and butyl orthophosphate.
GB11146/54A 1953-04-17 1954-04-15 Method of treating boiler feed water Expired GB762609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US762609XA 1953-04-17 1953-04-17

Publications (1)

Publication Number Publication Date
GB762609A true GB762609A (en) 1956-11-28

Family

ID=22130884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11146/54A Expired GB762609A (en) 1953-04-17 1954-04-15 Method of treating boiler feed water

Country Status (2)

Country Link
FR (1) FR1098491A (en)
GB (1) GB762609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1082235B (en) * 1958-09-06 1960-05-25 Henkel & Cie Gmbh Use of organic acylation products of phosphorous acid or its derivatives as complexing agents for metal ions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1082235B (en) * 1958-09-06 1960-05-25 Henkel & Cie Gmbh Use of organic acylation products of phosphorous acid or its derivatives as complexing agents for metal ions

Also Published As

Publication number Publication date
FR1098491A (en) 1955-07-27

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