GB473520A - Improved alkali-alkaline earth fertiliser and process of producing same - Google Patents

Improved alkali-alkaline earth fertiliser and process of producing same

Info

Publication number
GB473520A
GB473520A GB2019/37A GB201937A GB473520A GB 473520 A GB473520 A GB 473520A GB 2019/37 A GB2019/37 A GB 2019/37A GB 201937 A GB201937 A GB 201937A GB 473520 A GB473520 A GB 473520A
Authority
GB
United Kingdom
Prior art keywords
phosphate
fertiliser
alkaline earth
salt
reducing agent
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
GB2019/37A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB473520A publication Critical patent/GB473520A/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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

A double phosphate containing alkali metal, e.g. sodium or potassium, calcium, and combined sulphur in such a form as to be unreactive with water and carbon dioxide and which is free from alkali or alkaline-earth metal sulphides is obtained by mixing phosphate rock, an alkali metal sulphate, and an active carbonaceous reducing agent and heating the mixture to 700--900 DEG C. until the phosphate is completely decomposed. A rotary kiln may be used for the heating step, and the reducing agent may be powdered lignite or electrically precipitated lignite dust, charcoal or a reactive carbon. Advantageously sodium sulphate is used in the form of Glauber's salt, and 1,8 to 1,9 mols. of the salt may be used per mol. of calcium phosphate. Examples of operation are given.
GB2019/37A 1936-01-24 1937-01-22 Improved alkali-alkaline earth fertiliser and process of producing same Expired GB473520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE473520X 1936-01-24

Publications (1)

Publication Number Publication Date
GB473520A true GB473520A (en) 1937-10-14

Family

ID=6541579

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2019/37A Expired GB473520A (en) 1936-01-24 1937-01-22 Improved alkali-alkaline earth fertiliser and process of producing same

Country Status (1)

Country Link
GB (1) GB473520A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015189333A1 (en) 2014-06-11 2015-12-17 Outotec (Finland) Oy Production of citrate soluble phosphates by calcination of secondary phosphate sources with a sodium-sulfuric compound
EP3359509A4 (en) * 2015-10-08 2019-06-19 Liquid Fertiliser PTY Ltd. Aqueous dispersions of potassium calcium polyphosphate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015189333A1 (en) 2014-06-11 2015-12-17 Outotec (Finland) Oy Production of citrate soluble phosphates by calcination of secondary phosphate sources with a sodium-sulfuric compound
US10259752B2 (en) 2014-06-11 2019-04-16 Outotec (Finland) Oy Production of citrate soluble phosphates by calcination of secondary phosphate sources with a sodium-sulfuric compound
CN106414319B (en) * 2014-06-11 2019-06-07 奥图泰(芬兰)公司 Citric acid soluble phosphorus hydrochlorate is prepared by two hypophosphites sources of calcining and sodium sulfur-containing compound
EP3359509A4 (en) * 2015-10-08 2019-06-19 Liquid Fertiliser PTY Ltd. Aqueous dispersions of potassium calcium polyphosphate
AU2016336032B2 (en) * 2015-10-08 2020-10-22 Liquid Fertiliser Pty Ltd Aqueous dispersions of potassium calcium polyphosphate
US10889527B2 (en) 2015-10-08 2021-01-12 Liquid Fertiliser Pty Ltd Aqueous dispersions of potassium calcium polyphosphate
US11981610B2 (en) 2015-10-08 2024-05-14 Liquid Fertiliser Pty Ltd Aqueous dispersions of potassium calcium polyphosphate

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