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FR2669323B1 - PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED. - Google Patents

PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED.

Info

Publication number
FR2669323B1
FR2669323B1 FR9014594A FR9014594A FR2669323B1 FR 2669323 B1 FR2669323 B1 FR 2669323B1 FR 9014594 A FR9014594 A FR 9014594A FR 9014594 A FR9014594 A FR 9014594A FR 2669323 B1 FR2669323 B1 FR 2669323B1
Authority
FR
France
Prior art keywords
solutions
purified
chromic acid
used aqueous
aqueous solutions
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 - Fee Related
Application number
FR9014594A
Other languages
French (fr)
Other versions
FR2669323A1 (en
Inventor
Benaben Patrick
Andre
Rene
Popakul Joseph
Emmanuel Jean-Pierre
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.)
ISOCHROME
Original Assignee
ISOCHROME
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 ISOCHROME filed Critical ISOCHROME
Priority to FR9014594A priority Critical patent/FR2669323B1/en
Priority to PCT/FR1991/000870 priority patent/WO1992008825A1/en
Priority to AU89410/91A priority patent/AU8941091A/en
Publication of FR2669323A1 publication Critical patent/FR2669323A1/en
Application granted granted Critical
Publication of FR2669323B1 publication Critical patent/FR2669323B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/20—Regeneration of process solutions of rinse-solutions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Removal Of Specific Substances (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
FR9014594A 1990-11-16 1990-11-16 PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED. Expired - Fee Related FR2669323B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR9014594A FR2669323B1 (en) 1990-11-16 1990-11-16 PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED.
PCT/FR1991/000870 WO1992008825A1 (en) 1990-11-16 1991-11-08 Method for purifying concentrated, aqueous and used solutions of chromic acid, and solutions thereby purified
AU89410/91A AU8941091A (en) 1990-11-16 1991-11-08 Method for purifying concentrated, aqueous and used solutions of chromic acid, and solutions thereby purified

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9014594A FR2669323B1 (en) 1990-11-16 1990-11-16 PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED.

Publications (2)

Publication Number Publication Date
FR2669323A1 FR2669323A1 (en) 1992-05-22
FR2669323B1 true FR2669323B1 (en) 1993-06-18

Family

ID=9402482

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9014594A Expired - Fee Related FR2669323B1 (en) 1990-11-16 1990-11-16 PROCESS FOR PURIFYING USED AQUEOUS SOLUTIONS OF CHROMIC ACID AND SOLUTIONS THUS PURIFIED.

Country Status (3)

Country Link
AU (1) AU8941091A (en)
FR (1) FR2669323B1 (en)
WO (1) WO1992008825A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RO117687B1 (en) * 2000-10-30 2002-06-28 I. Petrişor Paul Lungulescu Process and installation for recovering metal from waste chromium plating solutions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7203993A (en) * 1972-03-24 1973-09-26 Treating chromium contg ind effluents - by neutralising with ammonia, heating and drying
US4337129A (en) * 1979-05-08 1982-06-29 The United States Of America As Represented By The Secretary Of The Interior Regeneration of waste metallurgical process liquor
JPS55161074A (en) * 1979-06-04 1980-12-15 Hitachi Ltd Recovering method for waste chromate solution
AT389100B (en) * 1987-06-09 1989-10-10 Koerner Chemieanlagen METAL UNIT AND NEUTRALIZATION SYSTEM FOR MULTIPLE METALS CONTAINING METALS

Also Published As

Publication number Publication date
FR2669323A1 (en) 1992-05-22
AU8941091A (en) 1992-06-11
WO1992008825A1 (en) 1992-05-29

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Legal Events

Date Code Title Description
ST Notification of lapse