JPS5738314A - Purifying method for aqueous phosphoric acid solution - Google Patents

Purifying method for aqueous phosphoric acid solution

Info

Publication number
JPS5738314A
JPS5738314A JP11341480A JP11341480A JPS5738314A JP S5738314 A JPS5738314 A JP S5738314A JP 11341480 A JP11341480 A JP 11341480A JP 11341480 A JP11341480 A JP 11341480A JP S5738314 A JPS5738314 A JP S5738314A
Authority
JP
Japan
Prior art keywords
phosphoric acid
soln
aqueous phosphoric
oxidizing agent
acid soln
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.)
Pending
Application number
JP11341480A
Other languages
Japanese (ja)
Inventor
Masaaki Wakamatsu
Taketo Matsuki
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals 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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP11341480A priority Critical patent/JPS5738314A/en
Publication of JPS5738314A publication Critical patent/JPS5738314A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/36—Regeneration of waste pickling liquors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:To simply regenerate a spent aqueous phosphoric acid soln. contg. iron ions by adding an oxidizing agent to the soln. to convert the ions into ferric phosphate with low solubility. CONSTITUTION:When the pickling of steel products by dipping in an aqueous phosphoric acid soln. is repeated, iron ions are accumulated in the soln., and the rust removing power is deteriorated gradually. By adding an oxidizing agent to such an aqueous phosphoric acid soln., ions existing in the form of ferrous phosphate are easily oxidized to ferric phosphate, and most of the ferric phosphate is deposited. The usable oxidizing agent is restricted to H2O2 and/or ozone in practical application so as to reuse the phosphoric acid soln. as a pickling soln. after purification.
JP11341480A 1980-08-20 1980-08-20 Purifying method for aqueous phosphoric acid solution Pending JPS5738314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11341480A JPS5738314A (en) 1980-08-20 1980-08-20 Purifying method for aqueous phosphoric acid solution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11341480A JPS5738314A (en) 1980-08-20 1980-08-20 Purifying method for aqueous phosphoric acid solution

Publications (1)

Publication Number Publication Date
JPS5738314A true JPS5738314A (en) 1982-03-03

Family

ID=14611649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11341480A Pending JPS5738314A (en) 1980-08-20 1980-08-20 Purifying method for aqueous phosphoric acid solution

Country Status (1)

Country Link
JP (1) JPS5738314A (en)

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