GB639775A - Improved cyclic process for producing dicalcium phosphate by reacting raw phosphate with phosphoric acid - Google Patents

Improved cyclic process for producing dicalcium phosphate by reacting raw phosphate with phosphoric acid

Info

Publication number
GB639775A
GB639775A GB27775/46A GB2777546A GB639775A GB 639775 A GB639775 A GB 639775A GB 27775/46 A GB27775/46 A GB 27775/46A GB 2777546 A GB2777546 A GB 2777546A GB 639775 A GB639775 A GB 639775A
Authority
GB
United Kingdom
Prior art keywords
phosphate
phosphoric acid
dicalcium phosphate
cyclic process
rock
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
GB27775/46A
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Publication of GB639775A publication Critical patent/GB639775A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
    • C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
    • C05B11/10—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid

Abstract

In a cyclic process for the production of dicalcium phosphate wherein phosphate rock is treated with phosphoric acid and the mixture is heated to precipitate dicalcium phosphate and wherein the mother liquor is used, with fresh phosphoric acid, for treating more rock, the amount of acid added, either free or as monocalcium phosphate, is such as to give in relation to the rock phosphate a molecular ratio P2O5 : CaO in the added material of about 0.5, and the total molecular ratio P2O5 : CaO in the reaction mixture prior to the separation of the dicalcium phosphate is maintained at less than 1.3. The temperature is preferably maintained near the boiling point. Examples of the process are given.
GB27775/46A 1942-04-30 1946-09-16 Improved cyclic process for producing dicalcium phosphate by reacting raw phosphate with phosphoric acid Expired GB639775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL639775X 1942-04-30

Publications (1)

Publication Number Publication Date
GB639775A true GB639775A (en) 1950-07-05

Family

ID=19788981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27775/46A Expired GB639775A (en) 1942-04-30 1946-09-16 Improved cyclic process for producing dicalcium phosphate by reacting raw phosphate with phosphoric acid

Country Status (1)

Country Link
GB (1) GB639775A (en)

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