GB633952A - Improvements in or relating to processes of producing agglomerated sodium hexametaphosphate and the improved product resulting therefrom - Google Patents

Improvements in or relating to processes of producing agglomerated sodium hexametaphosphate and the improved product resulting therefrom

Info

Publication number
GB633952A
GB633952A GB9975/47A GB997547A GB633952A GB 633952 A GB633952 A GB 633952A GB 9975/47 A GB9975/47 A GB 9975/47A GB 997547 A GB997547 A GB 997547A GB 633952 A GB633952 A GB 633952A
Authority
GB
United Kingdom
Prior art keywords
sodium hexametaphosphate
water
humidifying
per cent
alkalinity adjusting
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
GB9975/47A
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 Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical 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 Monsanto Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Publication of GB633952A publication Critical patent/GB633952A/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
    • C01B25/44—Metaphosphates
    • C01B25/445—Metaphosphates of alkali metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

Free flowing granular sodium hexametaphosphate for use as a water softener is produced by "humidifying" the finely-divided phosphate particles mixed, if desired, with an alkalinity adjusting agent, agitating to form agglomerates, screening to the desired size and rapidly removing moisture by drying at a temperature between 40 DEG and 90 DEG C. at an absolute pressure of 8-10 mm. of mercury. "Humidifying" includes the addition of water by a spray, humidified air, or by hydrated salts. Suitable alkalinity adjusting agents are soda ash, sodium sulphate, bisulphate, metasilicate and pyrophosphate, trisodium phosphate, soaps, sulphonated or sulphated and other non-saponaceous detergents, or mixtures of these, added up to 10 per cent by weight of sodium hexametaphosphate. A pH value between 7.5 and 8.5 in a 1 per cent solution in water is referred to.ALSO:Free flowing granular sodium hexametaphosphate for use as a water softener is produced by "humidifying" the finely divided phosphate particles mixed if desired with an alkalinity adjusting agent, agitating to form agglomerates, screening to the desired size and rapidly removing moisture by vacuum drying at a temperature between 40 DEG C and 90 DEG C at an absolute pressure of 8-10 mm. of mercury. "Humidifying" includes the addition of water by a spray, humidified air, or by hydrated salts. Suitable alkalinity adjusting agents are soda ash, sodium sulphate, bisulphate, metasilicate and pyrophosphate, trisodium phosphate, soaps, sulphonated, sulphated or other non saponaceous detergents, or mixtures of these, added up to 10 per cent by weight of sodium hexametaphosphate. A pH value of 7.5-8.5 in a 1 per cent solution in water is referred to.
GB9975/47A 1946-06-07 1947-04-15 Improvements in or relating to processes of producing agglomerated sodium hexametaphosphate and the improved product resulting therefrom Expired GB633952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US633952XA 1946-06-07 1946-06-07

Publications (1)

Publication Number Publication Date
GB633952A true GB633952A (en) 1949-12-30

Family

ID=22048922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9975/47A Expired GB633952A (en) 1946-06-07 1947-04-15 Improvements in or relating to processes of producing agglomerated sodium hexametaphosphate and the improved product resulting therefrom

Country Status (1)

Country Link
GB (1) GB633952A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097963B (en) * 1959-03-28 1961-01-26 Giulini Ges Mit Beschraenkter Process for the production of non-hygroscopic free-flowing, condensed glassy phosphates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097963B (en) * 1959-03-28 1961-01-26 Giulini Ges Mit Beschraenkter Process for the production of non-hygroscopic free-flowing, condensed glassy phosphates

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