GB475993A - A process for the preparation of fertilisers containing citrate-soluble phosphate - Google Patents

A process for the preparation of fertilisers containing citrate-soluble phosphate

Info

Publication number
GB475993A
GB475993A GB3536636A GB3536636A GB475993A GB 475993 A GB475993 A GB 475993A GB 3536636 A GB3536636 A GB 3536636A GB 3536636 A GB3536636 A GB 3536636A GB 475993 A GB475993 A GB 475993A
Authority
GB
United Kingdom
Prior art keywords
phosphate
mineral
alkali
trialkali
reaction
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
GB3536636A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3536636A priority Critical patent/GB475993A/en
Publication of GB475993A publication Critical patent/GB475993A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
    • C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates

Landscapes

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

Abstract

Products useful as fertilizers and comprising double salts of the type CaKPO4 are obtained by calcining mineral phosphates with trialkaliorthophosphates at moderate temperatures which may be below 1100 DEG C. For each part of P2O5 in the mineral phosphate a quantity of trialkali-phosphate containing more than 0,5, preferably about 0,8 parts of P2O5 must be employed. In place of trialkali phosphate, mixtures of alkali metaphosphate or pyrophosphate or mono- or di-alkali phosphate with alkali carbonate or alkali silicate may be used. Salts such as potassium chloride or magnesium chloride which assist the reaction may be added to the initial mixture and enable the reaction temperature to be lowered to 900 or 800 DEG C. By subjecting the mineral phosphate to a pretreatment with P2O5, for instance by using the waste gases from a phosphorus furnace, less trialkali phosphate may be used; the said pretreatment may increase the P2O5 content of the mineral by as much as 20 per cent. Reaction may be effected in a rotary or shaft furnace or in a Dwight-Lloyd blast apparatus, and the initial mixture may be moulded if desired.
GB3536636A 1936-12-24 1936-12-24 A process for the preparation of fertilisers containing citrate-soluble phosphate Expired GB475993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3536636A GB475993A (en) 1936-12-24 1936-12-24 A process for the preparation of fertilisers containing citrate-soluble phosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3536636A GB475993A (en) 1936-12-24 1936-12-24 A process for the preparation of fertilisers containing citrate-soluble phosphate

Publications (1)

Publication Number Publication Date
GB475993A true GB475993A (en) 1937-11-30

Family

ID=10376926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3536636A Expired GB475993A (en) 1936-12-24 1936-12-24 A process for the preparation of fertilisers containing citrate-soluble phosphate

Country Status (1)

Country Link
GB (1) GB475993A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007044699A1 (en) * 2007-07-10 2009-01-22 Axel Bruckert Fertilizer comprises phosphorus, nitrogen and calcium, where fertilizer is obtained by conversion of orthophosphoric acid with calcium phosphate containing organic source, which is obtained from e.g. animal flour

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007044699A1 (en) * 2007-07-10 2009-01-22 Axel Bruckert Fertilizer comprises phosphorus, nitrogen and calcium, where fertilizer is obtained by conversion of orthophosphoric acid with calcium phosphate containing organic source, which is obtained from e.g. animal flour

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