BG101023A - Process for the purification of phosphohoric acid - Google Patents

Process for the purification of phosphohoric acid

Info

Publication number
BG101023A
BG101023A BG101023A BG10102396A BG101023A BG 101023 A BG101023 A BG 101023A BG 101023 A BG101023 A BG 101023A BG 10102396 A BG10102396 A BG 10102396A BG 101023 A BG101023 A BG 101023A
Authority
BG
Bulgaria
Prior art keywords
acid
purification
phosphohoric
h2po4
h3po4
Prior art date
Application number
BG101023A
Other languages
Bulgarian (bg)
Inventor
Anders Weckman
Original Assignee
Kemira Chemicals Oy
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 Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Publication of BG101023A publication Critical patent/BG101023A/en

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)
  • Fertilizers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to a process for the purification of an impure phosphoric acid prepared by the wet process. The acid to be purified is concentrated to 58-68% P2O5 acid by heating. The impurities are removed from the acid by crystallization, as a compound M2+(H2PO4)2.n.H3PO4, where M2+ is a bivalent metal ion impurity and n may vary within 2-5.
BG101023A 1994-06-20 1996-12-03 Process for the purification of phosphohoric acid BG101023A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI942947A FI95905C (en) 1994-06-20 1994-06-20 Process for the purification of phosphoric acid
PCT/FI1995/000354 WO1995035257A1 (en) 1994-06-20 1995-06-19 Process for the purification of phosphoric acid

Publications (1)

Publication Number Publication Date
BG101023A true BG101023A (en) 1997-08-29

Family

ID=8540956

Family Applications (1)

Application Number Title Priority Date Filing Date
BG101023A BG101023A (en) 1994-06-20 1996-12-03 Process for the purification of phosphohoric acid

Country Status (12)

Country Link
EP (1) EP0768985A1 (en)
AU (1) AU2740195A (en)
BG (1) BG101023A (en)
CZ (1) CZ365596A3 (en)
FI (1) FI95905C (en)
HU (1) HUT76719A (en)
NO (1) NO965470L (en)
PL (1) PL318219A1 (en)
RO (1) RO114886B1 (en)
RU (1) RU2139240C1 (en)
SK (1) SK161696A3 (en)
WO (1) WO1995035257A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454101B1 (en) * 2002-03-15 2004-10-26 한국화학연구원 Purification method and equipment for phosphoric acid
KR100542969B1 (en) * 2005-03-18 2006-01-20 (주) 광진화학 Method of refining high-purity phosphoric acid continuously using deserted liquid from process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL26524A (en) * 1965-10-04 1970-07-19 Struthers Scient And Int Corp Phosphoric acid process

Also Published As

Publication number Publication date
FI95905C (en) 1996-04-10
HU9603513D0 (en) 1997-02-28
RU2139240C1 (en) 1999-10-10
SK161696A3 (en) 1997-07-09
RO114886B1 (en) 1999-08-30
WO1995035257A1 (en) 1995-12-28
AU2740195A (en) 1996-01-15
FI95905B (en) 1995-12-29
PL318219A1 (en) 1997-05-26
HUT76719A (en) 1997-10-28
FI942947A0 (en) 1994-06-20
NO965470D0 (en) 1996-12-19
CZ365596A3 (en) 1997-05-14
EP0768985A1 (en) 1997-04-23
NO965470L (en) 1996-12-19

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