GB344135A - Improvements in and relating to the treatment of phosphate rock and the like - Google Patents

Improvements in and relating to the treatment of phosphate rock and the like

Info

Publication number
GB344135A
GB344135A GB1240/30A GB124030A GB344135A GB 344135 A GB344135 A GB 344135A GB 1240/30 A GB1240/30 A GB 1240/30A GB 124030 A GB124030 A GB 124030A GB 344135 A GB344135 A GB 344135A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
distillation
phosphate
mother liquor
calcium nitrate
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
GB1240/30A
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.)
Odda Smelteverk AS
Original Assignee
Odda Smelteverk AS
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 Odda Smelteverk AS filed Critical Odda Smelteverk AS
Publication of GB344135A publication Critical patent/GB344135A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The mother liquor resulting from the treatment of rock phosphate with nitric acid and the separation of calcium nitrate as described in the parent Specification is freed from nitric acid by distillation, preferably under reduced pressure, before or after further treatment of the mother liquor. Direct distillation results in the production of monocalcium phosphate or mixtures of it with phosphoric acid but if the mother liquor contains larger quantities of calcium nitrate the distillation produces residues containing calcium nitrate, mono-calcium phosphate, and dicalcium phosphate. The nitric acid may also be distilled off before or after the remaining calcium is precipitated as gypsum by means of sulphuric acid, ammonium sulphate or alkali sulphates, phosphoric acid, ammonium or alkali phosphates being obtained from the solution remaining. The remaining calcium can also be precipitated by treating the solid mono-calcium phosphate, or a concentrated solution remaining after the distillation, with concentrated nitric acid and removing the solid calcium nitrate precipitated, the resulting phosphoric acid solution being freed from nitric acid by a second distillation. The distillation of nitric acid may be combined with its concentration, for example, by passing the vapours in counter current with strong sulphuric acid in a tower. The nitric acid vapours may also be introduced into a nitric acid tower system used in producing nitric acid from nitrogen oxides.ALSO:The mother liquor resulting from the treatment of rock phosphate with nitric acid and the separation of calcium nitrate as described in the parent Specification is freed from nitric acid by distillation, preferably under reduced pressure, before or after further treatment of the mother liquor. Direct distillation results in the production of monocalcium phosphate or mixtures of it with phosphoric acid, but if the mother liquor contains larger quantities of calcium nitrate the distillation produces residues containing calcium nitrate, monocalcium phosphate and dicalcium phosphate.
GB1240/30A 1929-01-14 1930-01-13 Improvements in and relating to the treatment of phosphate rock and the like Expired GB344135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO344135X 1929-01-14

Publications (1)

Publication Number Publication Date
GB344135A true GB344135A (en) 1931-03-05

Family

ID=19905322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1240/30A Expired GB344135A (en) 1929-01-14 1930-01-13 Improvements in and relating to the treatment of phosphate rock and the like

Country Status (1)

Country Link
GB (1) GB344135A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG86468A1 (en) * 2000-05-12 2002-02-19 Yoshino Gypsum Co Production process of high-purity gypsum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG86468A1 (en) * 2000-05-12 2002-02-19 Yoshino Gypsum Co Production process of high-purity gypsum

Similar Documents

Publication Publication Date Title
US1929441A (en) Process for obtaining orthophosphoric acid and/or conversion product thereof
GB344135A (en) Improvements in and relating to the treatment of phosphate rock and the like
GB391495A (en) Improvements in or relating to the production of mono-calcuim phosphate and di-calcium phosphate
US2899271A (en) Process for the manufacture of
GB1248037A (en) Calcium sulphate
MX159243A (en) PROCEDURE FOR THE PURIFICATION OF PROCESS PHOSPHORIC ACID IN WET
US1601233A (en) Process of making diammonium phosphate
GB1211537A (en) Improvements in or relating to the production of fertilisers comprising urea phosphate
GB396092A (en) A process for the production of nitrogenous and/or phosphatic mixed fertilisers of desired composition by treatment of raw phosphates with nitric acid
SU23998A1 (en) The method of obtaining complex phosphorus-containing fertilizers
GB300903A (en) Method of treating the product of reaction resulting from the treatment of raw phosphates or other phosphate containing substances with acids
GB388663A (en) Process for the production of dicalcium phosphate
GB361518A (en) Improvements in and relating to the treatment of phosphate rock and the manufacture of fertilisers
DE608576C (en) Process for the production of mixed fertilizers
GB295477A (en) Improvements in the manufacture and production of high grade fertilisers
GB883242A (en) Improvements in and relating to the production of mixtures of phosphoric and sulphuric acid
GB346734A (en) Improvements in and relating to the production of potassium nitrate with simultaneous obtaining of dimagnesium phosphate
SU253782A1 (en)
SU105992A1 (en) The method of obtaining concentrated nitrogen-phosphate fertilizer
GB716437A (en) Process for the manufacture of phosphate-containing fertilizers
GB492392A (en) Improvements in the manufacture and production of concentrated nitric acid and ammonium sulphate
GB316583A (en)
GB1220323A (en) Process for purifying aqueous phosphoric acid solutions
GB301387A (en) Process for manufacturing a homogeneous mixture of fertilizers
GB299796A (en) Improvements in the production of ammonium phosphates from mono- or di-calcium phosphate