GB782177A - Dicalcium phosphate - Google Patents

Dicalcium phosphate

Info

Publication number
GB782177A
GB782177A GB2608354A GB2608354A GB782177A GB 782177 A GB782177 A GB 782177A GB 2608354 A GB2608354 A GB 2608354A GB 2608354 A GB2608354 A GB 2608354A GB 782177 A GB782177 A GB 782177A
Authority
GB
United Kingdom
Prior art keywords
dicalcium phosphate
acid
neutralizing
precipitate
fluoride
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
GB2608354A
Inventor
Ronald Frederick Knight
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.)
Fisons Ltd
Original Assignee
Fisons Ltd
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 Fisons Ltd filed Critical Fisons Ltd
Priority to GB2608354A priority Critical patent/GB782177A/en
Publication of GB782177A publication Critical patent/GB782177A/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
    • C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
    • C01B25/322—Preparation by neutralisation of orthophosphoric acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Paper (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Fluoride is removed in the preparation of dicalcium phosphate from wet process phosphoric acid by neutralizing the acid with an alkaline compound of calcium, e.g. lime or calcium carbonate, to a pH range 2.9-3.1; removing the precipitate, which is mainly fluoride; and then neutralizing the residual acid to precipitate dicalcium phosphate.
GB2608354A 1954-09-09 1954-09-09 Dicalcium phosphate Expired GB782177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2608354A GB782177A (en) 1954-09-09 1954-09-09 Dicalcium phosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2608354A GB782177A (en) 1954-09-09 1954-09-09 Dicalcium phosphate

Publications (1)

Publication Number Publication Date
GB782177A true GB782177A (en) 1957-09-04

Family

ID=10238083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2608354A Expired GB782177A (en) 1954-09-09 1954-09-09 Dicalcium phosphate

Country Status (1)

Country Link
GB (1) GB782177A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294486A (en) * 1963-09-16 1966-12-27 Knapsack Ag Manufacture of dicalcium phosphate, dihydrate
US3391992A (en) * 1964-06-04 1968-07-09 Swift & Co Feed grade dicalcium phosphate
US4755367A (en) * 1985-05-02 1988-07-05 Benckiser-Knapsack Gmbh Process for the preparation of coarse-particle dicalcium phosphate dihydrate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294486A (en) * 1963-09-16 1966-12-27 Knapsack Ag Manufacture of dicalcium phosphate, dihydrate
US3391992A (en) * 1964-06-04 1968-07-09 Swift & Co Feed grade dicalcium phosphate
US4755367A (en) * 1985-05-02 1988-07-05 Benckiser-Knapsack Gmbh Process for the preparation of coarse-particle dicalcium phosphate dihydrate

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