GB1062344A - Production of granular superphosphate - Google Patents

Production of granular superphosphate

Info

Publication number
GB1062344A
GB1062344A GB622765A GB622765A GB1062344A GB 1062344 A GB1062344 A GB 1062344A GB 622765 A GB622765 A GB 622765A GB 622765 A GB622765 A GB 622765A GB 1062344 A GB1062344 A GB 1062344A
Authority
GB
United Kingdom
Prior art keywords
granules
slurry
superphosphate
granulator
available
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
GB622765A
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.)
WR Grace and Co
Original Assignee
WR Grace and 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 WR Grace and Co filed Critical WR Grace and Co
Publication of GB1062344A publication Critical patent/GB1062344A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
    • C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

The continuous production of granulated superphosphate containing at least 50% available P2O5 by mixing at 63 DEG to 105 DEG C. orthophosphoric acid containing 26-54% available P2O5, with finely divided phosphate rock containing not more than 26% available P2O5 to form a slurry in which the ratio of P2O5 derived from the acid to that derived from the rock is 2.3: 1 to 4.0: 1, discharging the slurry into a granulator where it is combined with recycled granular superphosphate in a ratio of recycled material to slurry of 5: 1 to 12: 1 and formed into granules, drying the resultant granules above 150 DEG C. for 10 minutes -16 hours, grading the dried granules, grinding the oversize granules and recycling them with the fine granules to the granulator. The slurry is fed to the downstream end of the granulator and the recycled superphosphate granules to the upstream end. All percentages are by weight.
GB622765A 1964-02-13 1965-02-12 Production of granular superphosphate Expired GB1062344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34467564A 1964-02-13 1964-02-13

Publications (1)

Publication Number Publication Date
GB1062344A true GB1062344A (en) 1967-03-22

Family

ID=23351510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB622765A Expired GB1062344A (en) 1964-02-13 1965-02-12 Production of granular superphosphate

Country Status (1)

Country Link
GB (1) GB1062344A (en)

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