GB378345A - Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors - Google Patents

Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors

Info

Publication number
GB378345A
GB378345A GB660132A GB660132A GB378345A GB 378345 A GB378345 A GB 378345A GB 660132 A GB660132 A GB 660132A GB 660132 A GB660132 A GB 660132A GB 378345 A GB378345 A GB 378345A
Authority
GB
United Kingdom
Prior art keywords
mixtures
sodium
mixture
orthophosphates
orthophosphoric acid
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
GB660132A
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.)
FED PHOSPHORUS CO
Original Assignee
FED PHOSPHORUS 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 FED PHOSPHORUS CO filed Critical FED PHOSPHORUS CO
Priority to GB660132A priority Critical patent/GB378345A/en
Publication of GB378345A publication Critical patent/GB378345A/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
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/38—Condensed phosphates
    • C01B25/39—Condensed phosphates of alkali metals
    • C01B25/395—Preparation and dehydrating
    • 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
    • C02F5/086—Condensed phosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

Mixtures of tetrasodium pyrophosphate and sodium metaphosphate having a predetermined hydrogen ion concentration in aqueous solution are obtained by mixing stoichiometrically proportioned amounts of different sodium orthophosphates, or of orthophosphoric acid with the sodium salt of a replaceable acid, heating the mixture to the melting-point, and quickly cooling, as by pouring the molten mass on a cold metal surface in thin layers. The mixture to be treated may consist of mono- and disodium orthophosphates, or of orthophosphoric acid and sodium carbonate, and equations are given whereby mixtures of the pyro-and metaphosphates in any determined proportions may be obtained. A diagram is furnished showing the melting points of the various mixtures and their pH value in solution, the latter value ranging from 6,4 to 10. The products may be used for controlling the pH value of water solutions, and particularly for treating boiler waters as they give the desired alkalinity and exhibit a delayed precipitating action towards the alkaline-earth metal salts.ALSO:The hydrogen ion concentration of water solutions is controlled by the use of mixtures of tetrasodium pyrophosphate and sodium metaphosphate prepared by mixing stoichiometrically proportioned amounts of different sodium orthophosphates, or of orthophosphoric acid with the sodium salt of a replaceable acid, heating the mixture to the melting point, and quickly cooling, as by pouring the molten mass on a cold metal surface in thin layers. The mixture to be heated may consist of mono- and disodium orthophosphates, or of orthophosphoric acid and sodium carbonate, and equations are given whereby mixtures of the pyro- and meta-phosphates in any determined proportions may be obtained. A diagram is furnished showing the melting points of the various mixtures and their pH value in solution, the latter value ranging from 6.4 to 10.
GB660132A 1932-03-04 1932-03-04 Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors Expired GB378345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB660132A GB378345A (en) 1932-03-04 1932-03-04 Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB660132A GB378345A (en) 1932-03-04 1932-03-04 Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors

Publications (1)

Publication Number Publication Date
GB378345A true GB378345A (en) 1932-08-11

Family

ID=9817454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB660132A Expired GB378345A (en) 1932-03-04 1932-03-04 Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors

Country Status (1)

Country Link
GB (1) GB378345A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747770C (en) * 1932-08-22 1944-10-13 Detergents, cleaning agents and dishwashing detergents
DE762903C (en) * 1934-05-17 1950-10-05 Henkel & Cie Gmbh Production of polyphosphates
DE767012C (en) * 1934-02-01 1951-07-26 Albert Ag Chem Werke Water softeners
US2668147A (en) * 1951-10-27 1954-02-02 Henkel & Cie Gmbh Process for producing a material containing sodium polyphosphates
US2811419A (en) * 1953-03-21 1957-10-29 Knapsack Ag Process for producing monomeric phosphates

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747770C (en) * 1932-08-22 1944-10-13 Detergents, cleaning agents and dishwashing detergents
DE767012C (en) * 1934-02-01 1951-07-26 Albert Ag Chem Werke Water softeners
DE762903C (en) * 1934-05-17 1950-10-05 Henkel & Cie Gmbh Production of polyphosphates
US2668147A (en) * 1951-10-27 1954-02-02 Henkel & Cie Gmbh Process for producing a material containing sodium polyphosphates
US2811419A (en) * 1953-03-21 1957-10-29 Knapsack Ag Process for producing monomeric phosphates

Similar Documents

Publication Publication Date Title
ES412477A1 (en) Process for treating aluminum surfaces
GB378345A (en) Improved manufacture of mixtures of sodium phosphates for treating boiler waters andother aqueous liquors
GB443782A (en) Improvements in or relating to water-softening reagents and methods of making the same
GB425001A (en) Improvements in or relating to water softening
US2358965A (en) Treatment of water with soluble dehydrated sodium phosphates
DE649757C (en) Manufacture of meta- and polyphosphates
GB247228A (en) Process for rapid evaporation to dryness of ammonium nitrate solutions
US2098431A (en) Water treating composition
US2266486A (en) Preparation of aluminum metaphosphate
US3338670A (en) Slowly soluble phosphate glasses
IE35795B1 (en) Grain-refining compounds and their use in metal cleaning liquids
GB495192A (en) Process for the manufacture of polyphosphates
GB486766A (en) Method of fireproofing inflammable materials
GB494911A (en) Improvements in a process for the preparation of crustless cheese
US2019666A (en) Method of obtaining tetraphosphates
US1984968A (en) Method of producing pyrophosphates
GB440400A (en) Preparation and use of aluminium compounds
US2149734A (en) Laundry starch and method of using the same
US1841944A (en) Production of acid substances used in the production of carbon dioxide
US2311598A (en) Process of making butter
US2132366A (en) Process of bating skins in leather manufacture
SU18068A1 (en) Method of making acid component for foam extinguishers
GB588433A (en) Improved method of softening water
SU54794A1 (en) The method of producing hexametaphosphate
PL24983B1 (en) Method for the production of polyphosphates.