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GB1296751A - - Google Patents

Info

Publication number
GB1296751A
GB1296751A GB344870A GB1296751DA GB1296751A GB 1296751 A GB1296751 A GB 1296751A GB 344870 A GB344870 A GB 344870A GB 1296751D A GB1296751D A GB 1296751DA GB 1296751 A GB1296751 A GB 1296751A
Authority
GB
United Kingdom
Prior art keywords
mixture
sodium metaphosphate
jan
water
heating
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
GB344870A
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 filed Critical
Publication of GB1296751A publication Critical patent/GB1296751A/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)
  • Processing Of Solid Wastes (AREA)

Abstract

1296751 Sodium metaphosphate ALBRIGHT & WILSON Ltd 19 Jan 1971 [23 Jan 1970] 3448/70 Heading C1A Insoluble sodium metaphosphate is prepared by heating a mixture of (A) monosodium orthophosphate or a mixture of a basic sodium compound and a phosphoric acid (Na : P = 1:1) and (B) 10-35% wt. of free water based on the weight of solids in the mixture. "Free water" includes water of crystallization but excludes water of constitution. It is preferred to heat the mixture at 300-400‹ C. and the mixture may include as seed 5-30% wt. of insoluble sodium metaphosphate based on the wt. of component A. Said seed material will preferably pass through a 100 BSS mesh sieve. The mixture of A and B may be pelleted or briquetted prior to heating preferably to have a maximum dimension of “-¢ inch.
GB344870A 1970-01-23 1970-01-23 Expired GB1296751A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB344870 1970-01-23
CA104,704A CA971729A (en) 1970-01-23 1971-02-08 Alkali metal phosphate manufacture

Publications (1)

Publication Number Publication Date
GB1296751A true GB1296751A (en) 1972-11-15

Family

ID=25666718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB344870A Expired GB1296751A (en) 1970-01-23 1970-01-23

Country Status (2)

Country Link
CA (1) CA971729A (en)
GB (1) GB1296751A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348151A1 (en) * 1976-04-15 1977-11-10 Hoechst Ag MADDRELL SALT PREPARATION PROCESS

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360625A (en) * 1979-12-14 1982-11-23 Monsanto Company Acicular, crystalline calcium metaphosphate
DE3543394A1 (en) * 1985-12-07 1987-06-11 Benckiser Knapsack Gmbh METHOD FOR PRODUCING MADDRELL'S SALT, AND SODIUM DIHYDROGEN PHOSPHATE, CONTAINING 0.05 - 2.5 MOL% PHOSPHORIC ACID OR AMMONIUM PHOSPHATE IN A STATISTICAL DISTRIBUTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348151A1 (en) * 1976-04-15 1977-11-10 Hoechst Ag MADDRELL SALT PREPARATION PROCESS

Also Published As

Publication number Publication date
CA971729A (en) 1975-07-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees