FR2362083A1 - Procede de defluoration des eaux industrielles - Google Patents

Procede de defluoration des eaux industrielles

Info

Publication number
FR2362083A1
FR2362083A1 FR7625540A FR7625540A FR2362083A1 FR 2362083 A1 FR2362083 A1 FR 2362083A1 FR 7625540 A FR7625540 A FR 7625540A FR 7625540 A FR7625540 A FR 7625540A FR 2362083 A1 FR2362083 A1 FR 2362083A1
Authority
FR
France
Prior art keywords
lime
flocculating
effluent
calcium fluoride
effluent water
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.)
Withdrawn
Application number
FR7625540A
Other languages
English (en)
Inventor
Stal
Francois Guillot
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.)
SETAL
Original Assignee
SETAL
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 SETAL filed Critical SETAL
Priority to FR7625540A priority Critical patent/FR2362083A1/fr
Publication of FR2362083A1 publication Critical patent/FR2362083A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/20—Halides
    • C01F11/22—Fluorides
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Il utilise une neutralisation par la chaux ordinaire de l'acide fluorhydrique, et une séparation physique du fluorure de calcium obtenu, par floculation et décantation très rapide. Le surnageant est parfaitement limpide, et peut être envoyé à l'égout après redressement éventuel du pH. Le procedé peut être utilisé pour le traitement des rejets des industries utilisant le fluor, telles que verreries, ou traitement de surface.
FR7625540A 1976-08-19 1976-08-19 Procede de defluoration des eaux industrielles Withdrawn FR2362083A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7625540A FR2362083A1 (fr) 1976-08-19 1976-08-19 Procede de defluoration des eaux industrielles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7625540A FR2362083A1 (fr) 1976-08-19 1976-08-19 Procede de defluoration des eaux industrielles

Publications (1)

Publication Number Publication Date
FR2362083A1 true FR2362083A1 (fr) 1978-03-17

Family

ID=9177084

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625540A Withdrawn FR2362083A1 (fr) 1976-08-19 1976-08-19 Procede de defluoration des eaux industrielles

Country Status (1)

Country Link
FR (1) FR2362083A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627481A1 (fr) * 1988-02-24 1989-08-25 Hacker Maschinen Gmbh Procede pour epurer des eaux usees de l'industrie du verre
US5443741A (en) * 1990-11-19 1995-08-22 Imperial Chemical Industries Plc Treatment of dilute acidic solutions
FR2771727A1 (fr) * 1997-11-28 1999-06-04 Sgs Thomson Microelectronics Defluoruration d'eaux usees

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627481A1 (fr) * 1988-02-24 1989-08-25 Hacker Maschinen Gmbh Procede pour epurer des eaux usees de l'industrie du verre
US5443741A (en) * 1990-11-19 1995-08-22 Imperial Chemical Industries Plc Treatment of dilute acidic solutions
FR2771727A1 (fr) * 1997-11-28 1999-06-04 Sgs Thomson Microelectronics Defluoruration d'eaux usees
US6436297B1 (en) 1997-11-28 2002-08-20 Stmicroelectronics S.A. Defluoridation of waste water

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Legal Events

Date Code Title Description
ST Notification of lapse