GB1365010A - Purification of wet process h3po4 by solvent extraction - Google Patents

Purification of wet process h3po4 by solvent extraction

Info

Publication number
GB1365010A
GB1365010A GB1487372A GB1487372A GB1365010A GB 1365010 A GB1365010 A GB 1365010A GB 1487372 A GB1487372 A GB 1487372A GB 1487372 A GB1487372 A GB 1487372A GB 1365010 A GB1365010 A GB 1365010A
Authority
GB
United Kingdom
Prior art keywords
phosphoric acid
phase
solvent
per cent
aqueous liquid
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
GB1487372A
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.)
USS Engineers and Consultants Inc
Original Assignee
USS Engineers and Consultants Inc
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 USS Engineers and Consultants Inc filed Critical USS Engineers and Consultants Inc
Publication of GB1365010A publication Critical patent/GB1365010A/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
    • C01B25/46—Preparation involving solvent-solvent extraction
    • C01B25/461—Preparation involving solvent-solvent extraction the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound
    • C01B25/462—Preparation involving solvent-solvent extraction the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound the extracting agent being alcohol or a mixture of alcohols

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

1365010 Purification of phosphoric acid USS ENGS & CONSULTANTS Inc 29 March 1972 [29 March 1971] 14873/72 Heading C1A Iron aluminium, magnesium and organic impurities are removed from wet-process phosphoric acid obtained by digesting phosphate rock with sulphuric acid to form a slurry comprising phosphoric acid, calcium sulphate and sulphuric acid and separating the slurry into a solid phase and an aqueous, liquid phase, using a process comprising (a) concentrating the aqueous liquid until it contains at least 50 wt. per cent P2O5, (b) extracting the concentrated aqueous liquid phase with a solvent for phosphoric acid, the solvent being selected from n-hexanol, nheptanol, n-octanol and iso-octanol and mixtures thereof so that at least 50 wt. per cent of the P2O5 in the aqueous liquid phase is transferred to the solvent phase and at least 50 weight per cent of the iron, aluminium and magnesium originally present remain in the aqueous liquid phase, (c) stripping the phosphoric acid rich solvent phase with water so that at least 90 wt. per cent of the P2O5 in the solvent phase is transferred to the aqueous phase, (d) recycling the stripped solvent from step (c) to step (b), and (e) recovering the purified phosphoric acid.
GB1487372A 1971-03-29 1972-03-29 Purification of wet process h3po4 by solvent extraction Expired GB1365010A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12907571A 1971-03-29 1971-03-29

Publications (1)

Publication Number Publication Date
GB1365010A true GB1365010A (en) 1974-08-29

Family

ID=22438346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1487372A Expired GB1365010A (en) 1971-03-29 1972-03-29 Purification of wet process h3po4 by solvent extraction

Country Status (3)

Country Link
FR (1) FR2132203B1 (en)
GB (1) GB1365010A (en)
NL (1) NL7204256A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040487A1 (en) * 1980-05-19 1981-11-25 FMC Corporation Method of regenerating phosphoric acid extraction solvent
CN109941979A (en) * 2019-04-30 2019-06-28 舒爱桦 A kind of technique of concentrated fertilizer phosphoric acid food grade phosphoric acid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580915B1 (en) * 1992-07-31 1996-05-15 Foret, S.A. Process for the elimination of build-up contaminants in an organic stream for production of pure phosphoric acid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1292338A (en) * 1961-03-22 1962-05-04 Ets Kuhlmann Wet process for obtaining pure phosphoric acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040487A1 (en) * 1980-05-19 1981-11-25 FMC Corporation Method of regenerating phosphoric acid extraction solvent
CN109941979A (en) * 2019-04-30 2019-06-28 舒爱桦 A kind of technique of concentrated fertilizer phosphoric acid food grade phosphoric acid

Also Published As

Publication number Publication date
NL7204256A (en) 1972-10-03
FR2132203B1 (en) 1977-07-22
FR2132203A1 (en) 1972-11-17

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees