FI892178A0 - Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra. - Google Patents

Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra.

Info

Publication number
FI892178A0
FI892178A0 FI892178A FI892178A FI892178A0 FI 892178 A0 FI892178 A0 FI 892178A0 FI 892178 A FI892178 A FI 892178A FI 892178 A FI892178 A FI 892178A FI 892178 A0 FI892178 A0 FI 892178A0
Authority
FI
Finland
Prior art keywords
tungmetaller
fosforsyra
avlaegsning
fraon
foerfarande foer
Prior art date
Application number
FI892178A
Other languages
English (en)
Other versions
FI892178A (fi
FI82672C (fi
FI82672B (fi
Inventor
Erkki Aalto
Esko Kari
Matti Kivioja
Original Assignee
Kemira 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 Oy filed Critical Kemira Oy
Priority to FI892178A priority Critical patent/FI82672C/fi
Publication of FI892178A0 publication Critical patent/FI892178A0/fi
Priority to NL9001070A priority patent/NL9001070A/nl
Publication of FI892178A publication Critical patent/FI892178A/fi
Application granted granted Critical
Publication of FI82672B publication Critical patent/FI82672B/fi
Publication of FI82672C publication Critical patent/FI82672C/fi

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
    • C01B25/237—Selective elimination of impurities
    • C01B25/238—Cationic impurities, e.g. arsenic compounds
    • 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
    • C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
    • C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
FI892178A 1989-05-05 1989-05-05 Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra. FI82672C (fi)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI892178A FI82672C (fi) 1989-05-05 1989-05-05 Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra.
NL9001070A NL9001070A (nl) 1989-05-05 1990-05-03 Werkwijze voor de elektrolytische verwijdering van zware metalen uit fosforzuur.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI892178 1989-05-05
FI892178A FI82672C (fi) 1989-05-05 1989-05-05 Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra.

Publications (4)

Publication Number Publication Date
FI892178A0 true FI892178A0 (fi) 1989-05-05
FI892178A FI892178A (fi) 1990-11-06
FI82672B FI82672B (fi) 1990-12-31
FI82672C FI82672C (fi) 1991-04-10

Family

ID=8528367

Family Applications (1)

Application Number Title Priority Date Filing Date
FI892178A FI82672C (fi) 1989-05-05 1989-05-05 Foerfarande foer elektrolytisk avlaegsning av tungmetaller fraon fosforsyra.

Country Status (2)

Country Link
FI (1) FI82672C (fi)
NL (1) NL9001070A (fi)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8518601D0 (en) * 1985-07-23 1985-08-29 Tenneco Canada Inc Removal of arsenic from acids
GB8816439D0 (en) * 1988-07-11 1988-08-17 Shell Int Research Removal of cadmium from phosphoric acid-containing solutions

Also Published As

Publication number Publication date
FI892178A (fi) 1990-11-06
FI82672C (fi) 1991-04-10
FI82672B (fi) 1990-12-31
NL9001070A (nl) 1990-12-03

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Legal Events

Date Code Title Description
FG Patent granted

Owner name: KEMIRA OY

MA Patent expired