NO965470L - Process for the purification of phosphoric acid - Google Patents

Process for the purification of phosphoric acid

Info

Publication number
NO965470L
NO965470L NO965470A NO965470A NO965470L NO 965470 L NO965470 L NO 965470L NO 965470 A NO965470 A NO 965470A NO 965470 A NO965470 A NO 965470A NO 965470 L NO965470 L NO 965470L
Authority
NO
Norway
Prior art keywords
purification
acid
phosphoric acid
h2po4
h3po4
Prior art date
Application number
NO965470A
Other languages
Norwegian (no)
Other versions
NO965470D0 (en
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 NO965470D0 publication Critical patent/NO965470D0/en
Publication of NO965470L publication Critical patent/NO965470L/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

Oppfinnelsen angår en frem- gangsmåte for rensing av en uren fosfor- syre fremstilt ved våtprosessen. Syren som skal renses konsentreres til 58-68 % P205-syre ved oppvarming. Urenheter fjer- nes fra syren ved krystallisasjon som en forbindelse MJ* (H2P04)2 ¿ n ¿ H3P04, hvor M2* er en toverdig metallionurenhet og n kan variere innen 2-5.The invention relates to a process for the purification of an impure phosphoric acid produced by the wet process. The acid to be purified is concentrated to 58-68% P205 acid upon heating. Impurities are removed from the acid by crystallization as a compound MJ * (H2PO4) 2 ¿n ¿H3PO4, where M2 * is a divalent metal ion impurity and n can vary within 2-5.

NO965470A 1994-06-20 1996-12-19 Process for the purification of phosphoric acid NO965470L (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 (2)

Publication Number Publication Date
NO965470D0 NO965470D0 (en) 1996-12-19
NO965470L true NO965470L (en) 1996-12-19

Family

ID=8540956

Family Applications (1)

Application Number Title Priority Date Filing Date
NO965470A NO965470L (en) 1994-06-20 1996-12-19 Process for the purification of phosphoric 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
NO965470D0 (en) 1996-12-19
FI942947A0 (en) 1994-06-20
WO1995035257A1 (en) 1995-12-28
BG101023A (en) 1997-08-29
PL318219A1 (en) 1997-05-26
HUT76719A (en) 1997-10-28
FI95905B (en) 1995-12-29
HU9603513D0 (en) 1997-02-28
AU2740195A (en) 1996-01-15
CZ365596A3 (en) 1997-05-14
EP0768985A1 (en) 1997-04-23
RO114886B1 (en) 1999-08-30
SK161696A3 (en) 1997-07-09
FI95905C (en) 1996-04-10
RU2139240C1 (en) 1999-10-10

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application