GB419641A - An improved process for the production of monocalcium phosphate - Google Patents

An improved process for the production of monocalcium phosphate

Info

Publication number
GB419641A
GB419641A GB7400/34A GB740034A GB419641A GB 419641 A GB419641 A GB 419641A GB 7400/34 A GB7400/34 A GB 7400/34A GB 740034 A GB740034 A GB 740034A GB 419641 A GB419641 A GB 419641A
Authority
GB
United Kingdom
Prior art keywords
monocalcium phosphate
phosphate
mother liquor
sulphuric acid
production
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
GB7400/34A
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.)
Kali Forschungs Anstalt GmbH
Original Assignee
Kali Forschungs Anstalt GmbH
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 Kali Forschungs Anstalt GmbH filed Critical Kali Forschungs Anstalt GmbH
Publication of GB419641A publication Critical patent/GB419641A/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
    • C05B11/08—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 sulfuric acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Monocalcium phosphate is obtained by reacting crude phosphate with sulphuric acid to obtain a solution fully saturated in the hot state with monocalcium phosphate and almost saturated with dicalcium phosphate, separating the residue and deposited calcium sulphate, and cooling to crystallize monocalcium phosphate. Liquor obtained by washing the residue, and preferably also the mother liquor from the crystallizing step after evaporation if necessary, are re-used in the process. In the latter case the amount of sulphuric acid used is correspondingly reduced. By so selecting the concentration of sulphuric acid that the water introduced with it in the form of washing water is removed as water of crystallization of the calcium sulphate and of the monocalcium phosphate, evaporation of the mother liquor from the crystallizing step is rendered unnecessary. The mother liquor containing free phosphoric acid may alternatively be used for the production of dicalcium or ammonium phosphates. Two examples are given.
GB7400/34A 1933-03-31 1934-03-08 An improved process for the production of monocalcium phosphate Expired GB419641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE419641X 1933-03-31

Publications (1)

Publication Number Publication Date
GB419641A true GB419641A (en) 1934-11-15

Family

ID=6449010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7400/34A Expired GB419641A (en) 1933-03-31 1934-03-08 An improved process for the production of monocalcium phosphate

Country Status (1)

Country Link
GB (1) GB419641A (en)

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