GB1220323A - Process for purifying aqueous phosphoric acid solutions - Google Patents

Process for purifying aqueous phosphoric acid solutions

Info

Publication number
GB1220323A
GB1220323A GB298869A GB298869A GB1220323A GB 1220323 A GB1220323 A GB 1220323A GB 298869 A GB298869 A GB 298869A GB 298869 A GB298869 A GB 298869A GB 1220323 A GB1220323 A GB 1220323A
Authority
GB
United Kingdom
Prior art keywords
solution
phosphoric acid
sulphate
concentration
acid solutions
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
GB298869A
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.)
Societa Italiana Resine SpA SIR
Original Assignee
Societa Italiana Resine SpA SIR
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 Societa Italiana Resine SpA SIR filed Critical Societa Italiana Resine SpA SIR
Publication of GB1220323A publication Critical patent/GB1220323A/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
    • C01B25/234—Purification; Stabilisation; Concentration
    • C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine

Landscapes

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

Abstract

1,220,323. Purifying phosphoric acid. SOC. ITALIANA RESINE S.p.A. 17 Jan., 1969 [27 Jan., 1968], No. 2988/69. Heading C1A. An aqueous solution containing phosphoric acid and phosphates is concentrated from a concentration of P 2 O 5 not exceeding 25% by weight to more than 40% by weight and is freed from sulphate present, by mixing it with a solution having a higher P 2 O 5 content, precipitating calcium sulphate from the intermediate solution which has a concentration of 25% to 40% by wt. P 2 O 5 , separating the sulphate and evaporating the solution in vacuo to attain the desired concentration. Preferably the solution having a higher P 2 O 5 content contains 25 to 40% by wt. of P 2 O 5 . The high concentration product solution may be recycled as part of the added higher P 2 O 5 content solution. The process is applicable to phosphoric acid solutions obtained by leaching phosphate rock and removing most of the sulphate present by precipitation with phosphate rock.
GB298869A 1968-01-27 1969-01-17 Process for purifying aqueous phosphoric acid solutions Expired GB1220323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT823923 1968-01-27

Publications (1)

Publication Number Publication Date
GB1220323A true GB1220323A (en) 1971-01-27

Family

ID=11126177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB298869A Expired GB1220323A (en) 1968-01-27 1969-01-17 Process for purifying aqueous phosphoric acid solutions

Country Status (1)

Country Link
GB (1) GB1220323A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943232A (en) * 1974-03-04 1976-03-09 Atlantic Richfield Company Process for the defluorination of dilute fluorine containing aqueous acid solutions
US4026995A (en) * 1976-02-11 1977-05-31 Atlantic Richfield Company Process for defluorination of commercial phosphoric acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943232A (en) * 1974-03-04 1976-03-09 Atlantic Richfield Company Process for the defluorination of dilute fluorine containing aqueous acid solutions
US4026995A (en) * 1976-02-11 1977-05-31 Atlantic Richfield Company Process for defluorination of commercial phosphoric acid

Similar Documents

Publication Publication Date Title
ES322743A1 (en) Phosphoric acid
GB1309578A (en) Process for purifying phosphoric acid
ES371726A1 (en) Production of potassium dihydrogen phosphate fertilizers
GB1220323A (en) Process for purifying aqueous phosphoric acid solutions
US3122415A (en) Method for the production of phosphoric acid
GB1263310A (en) The preparation of very pure cryolite
ES8406376A1 (en) Process for the purification of wet-process phosphoric acid.
GB1248037A (en) Calcium sulphate
GB1324256A (en) Process for preparing a fertilizer and furfural
GB1314281A (en) Removal of iron from phosphoric acid
GB1404546A (en) Process for purifying commercial-grade phosphoric acid by extraction
GB1280855A (en) Process for the recovery of metallic catalysts
US2202526A (en) Purification of phosphoric acid
GB1472970A (en) Purfified phosphoric acid and its production
GB1211537A (en) Improvements in or relating to the production of fertilisers comprising urea phosphate
GB1334871A (en) Urea crystals pellets prills and the like
GB1155957A (en) Phosphoric Acid Purification Process.
GB1322119A (en) Recovery of ammonium sulphate
GB1491086A (en) Method of producing a neutral ammonium polyphosphate
GB1208632A (en) Improvements in or relating to the production of urea phosphate
IL38330A (en) Production of potassium dihydrogen phosphate/potassium nitrate mixtures
GB1229360A (en)
GB1436114A (en) Purification of phosphoric acid crystallization process
GB852538A (en) Process for enriching natural phosphates
GB1141747A (en) Production of fertilizer materials