GB785626A - Improvements in or relating to the treatment of water - Google Patents

Improvements in or relating to the treatment of water

Info

Publication number
GB785626A
GB785626A GB996156A GB996156A GB785626A GB 785626 A GB785626 A GB 785626A GB 996156 A GB996156 A GB 996156A GB 996156 A GB996156 A GB 996156A GB 785626 A GB785626 A GB 785626A
Authority
GB
United Kingdom
Prior art keywords
silicic acid
phosphate
weight
per cent
calcium metaphosphate
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
GB996156A
Inventor
Bernward Garre
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.)
BK Giulini Chemie GmbH
Original Assignee
Giulini Gebrueder GmbH
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
Priority to NL203834D priority Critical patent/NL203834A/xx
Priority to BE545414D priority patent/BE545414A/xx
Priority to NL92131D priority patent/NL92131C/xx
Priority to CH340457D priority patent/CH340457A/en
Application filed by Giulini Gebrueder GmbH filed Critical Giulini Gebrueder GmbH
Priority to GB996156A priority patent/GB785626A/en
Publication of GB785626A publication Critical patent/GB785626A/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
    • 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)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

A sparingly-soluble phosphate intended for treating water is modified by incorporating in it from 0.5 to 10 per cent (preferably from 1 to 3 per cent) by weight of crystalline silicic acid based on the weight of the phosphate. The preferred phosphate is calcium metaphosphate. The reagent may be prepared by mixing with calcium metaphosphate silicic acid which has been freshly precipitated (e.g. by the addition of acid to a solution of an alkali metal silicate) and fusing the mass, the fused mass being cooled slowly to ensure that the silicic acid is present in crystalline form.ALSO:Water is treated with a sparingly-soluble phosphate containing from 0,5 to 10 per cent by weight of crystalline silicic acid based on the weight of the phosphate. The preferred range of silicic acid is from 1 to 3 per cent and the preferred phosphate is calcium metaphosphate. The reagent may be prepared by mixing precipitated silicic acid with calcium metaphosphate, fusing, and cooling slowly. The corrosive action on iron of phosphate-treated water is reduced by the inclusion of the crystalline silicic acid.
GB996156A 1956-03-29 1956-03-29 Improvements in or relating to the treatment of water Expired GB785626A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL203834D NL203834A (en) 1956-03-29
BE545414D BE545414A (en) 1956-03-29
NL92131D NL92131C (en) 1956-03-29
CH340457D CH340457A (en) 1956-03-29 1956-01-27 Process for the treatment of raw water with poorly soluble phosphates
GB996156A GB785626A (en) 1956-03-29 1956-03-29 Improvements in or relating to the treatment of water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB996156A GB785626A (en) 1956-03-29 1956-03-29 Improvements in or relating to the treatment of water

Publications (1)

Publication Number Publication Date
GB785626A true GB785626A (en) 1957-10-30

Family

ID=9881975

Family Applications (1)

Application Number Title Priority Date Filing Date
GB996156A Expired GB785626A (en) 1956-03-29 1956-03-29 Improvements in or relating to the treatment of water

Country Status (4)

Country Link
BE (1) BE545414A (en)
CH (1) CH340457A (en)
GB (1) GB785626A (en)
NL (2) NL203834A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571745B1 (en) * 1984-10-17 1988-10-28 Trest Juzhvodoprovod ANTI-CORROSIVE FOR PROTECTING THE INTERNAL SURFACE OF A CORROSION PIPE, METHOD FOR OBTAINING THIS ANTI-CORROSIVE AND METHOD FOR PROTECTING THE INTERNAL SURFACE OF A CORROSION PIPE USING THIS ANTI-CORROSION

Also Published As

Publication number Publication date
NL92131C (en)
BE545414A (en)
NL203834A (en)
CH340457A (en) 1959-08-15

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