GB692253A - Improvements in or relating to the production of dicalcium phosphate from an acid solution containing fluorine, calcium and phosphoric acid - Google Patents

Improvements in or relating to the production of dicalcium phosphate from an acid solution containing fluorine, calcium and phosphoric acid

Info

Publication number
GB692253A
GB692253A GB14904/48A GB1490448A GB692253A GB 692253 A GB692253 A GB 692253A GB 14904/48 A GB14904/48 A GB 14904/48A GB 1490448 A GB1490448 A GB 1490448A GB 692253 A GB692253 A GB 692253A
Authority
GB
United Kingdom
Prior art keywords
calcium
phosphoric acid
dicalcium phosphate
acid solution
solution containing
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
GB14904/48A
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 GB692253A publication Critical patent/GB692253A/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
    • C05B11/06—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 nitric acid (nitrophosphates)

Landscapes

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

Abstract

In making a material comprising dicalcium phosphate by treating an acid solution containing fluorine, calcium and phosphoric acid with a neutralizing agent and separating the precipitate from the solution, the pH value of the reaction mixture during the neutralizing treatment is maintained below 2.5. In one embodiment the acid solution and neutralizing agent are continuously run into a reactor and the reaction mixture continuously withdrawn, the ratio of the rates of flow of the reactants being adjusted so as to maintain a pH value between 1.5 and 2.5. The molar ratio CaO/P2O5 may be adjusted to give sufficient calcium for combination with the phosphoric acid and fluorine to dicalcium phosphate and calcium fluoride respectively, either by crystallizing and removing the required quantity of calcium nitrate or by adding phosphoric acid. Specifications 430,380, 626,662 and 692,251 [Group I], are referred to.
GB14904/48A 1947-06-17 1948-06-02 Improvements in or relating to the production of dicalcium phosphate from an acid solution containing fluorine, calcium and phosphoric acid Expired GB692253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE692253X 1947-06-17

Publications (1)

Publication Number Publication Date
GB692253A true GB692253A (en) 1953-06-03

Family

ID=3878089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14904/48A Expired GB692253A (en) 1947-06-17 1948-06-02 Improvements in or relating to the production of dicalcium phosphate from an acid solution containing fluorine, calcium and phosphoric acid

Country Status (1)

Country Link
GB (1) GB692253A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121004A (en) * 1960-06-01 1964-02-11 Stamicarbon Process of preparing a compound fertilizer containing nitrogen, calcium and phosphate, and resultant product
US3149957A (en) * 1960-09-02 1964-09-22 Stamicarbon N V Heerlen Preparation of a granular compound fertilizer containing nu, p and k

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121004A (en) * 1960-06-01 1964-02-11 Stamicarbon Process of preparing a compound fertilizer containing nitrogen, calcium and phosphate, and resultant product
US3149957A (en) * 1960-09-02 1964-09-22 Stamicarbon N V Heerlen Preparation of a granular compound fertilizer containing nu, p and k

Similar Documents

Publication Publication Date Title
GB765901A (en) Improvements in or relating to production of fluorine compounds
ES392861A1 (en) Process for purifying phosphoric acids by neutralization with an alkali metal hydroxide and/or carbonate
GB968305A (en) Process for the preparation of metal ammonium phosphates
ES346854A1 (en) Process for the production of phosphoric acid
GB692253A (en) Improvements in or relating to the production of dicalcium phosphate from an acid solution containing fluorine, calcium and phosphoric acid
ES310273A1 (en) Process for the purification of residual gypsum formed in the manufacture of phosphoric acid by the action of sulphuric acid on natural phosphates
GB378670A (en) Improvements in or relating to decomposing raw phosphates
ES221145A1 (en) Process for producing defluorinated phosphate material
GB1211537A (en) Improvements in or relating to the production of fertilisers comprising urea phosphate
GB886217A (en) Process for the manufacture of reaction products from phosphoric acid and sodium carbonate
GB484037A (en) Method of producing dicalcium phosphate and calcium nitrate solution
GB1509798A (en) Process for preparing monocalcium phosphate compositions having reduced caking tendencies
GB953598A (en) Process of treating phosphate rock
GB1398331A (en) Preparation of phosphoric acid by the wet process
GB692251A (en) Compound fertilisers and the production thereof
GB639775A (en) Improved cyclic process for producing dicalcium phosphate by reacting raw phosphate with phosphoric acid
GB1033938A (en) Process and apparatus for the manufacture of phosphorous oxychloride and/or phosphorous-chlorine-oxygen compounds of the general formula: pocl where n>1
GB1515211A (en) Process for the production of trisodium phosphate
GB692252A (en) Improvements in or relating to the production of a compound fertiliser from an acid solution containing fluorine, calcium and phosphoric acid
GB1072000A (en) Abrasives and dentifrice compositions
GB630196A (en) Process for the production of calcium magnesium phosphates
GB518737A (en) Improvements in or relating to a method of making anhydrous monocalcium phosphate and in products containing the same
ES341588A1 (en) A procedure for the production of a phosphonitrogenated fertilizer. (Machine-translation by Google Translate, not legally binding)
GB1075264A (en) Production of phosphate compositions
GB1468318A (en) Production of plasters from phosphated gypsums