FR2401098A1 - PROCESS FOR THE INDUSTRIAL PREPARATION OF METALLIC OXIDES, IN PARTICULAR MAGNESIUM OXIDE AND APPARATUS FOR CARRYING OUT THE PROCESS - Google Patents

PROCESS FOR THE INDUSTRIAL PREPARATION OF METALLIC OXIDES, IN PARTICULAR MAGNESIUM OXIDE AND APPARATUS FOR CARRYING OUT THE PROCESS

Info

Publication number
FR2401098A1
FR2401098A1 FR7823994A FR7823994A FR2401098A1 FR 2401098 A1 FR2401098 A1 FR 2401098A1 FR 7823994 A FR7823994 A FR 7823994A FR 7823994 A FR7823994 A FR 7823994A FR 2401098 A1 FR2401098 A1 FR 2401098A1
Authority
FR
France
Prior art keywords
brine
stream
collected
magnesium oxide
waste gas
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.)
Granted
Application number
FR7823994A
Other languages
French (fr)
Other versions
FR2401098B1 (en
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.)
Veitscher Magnesitwerke AG
Original Assignee
Veitscher Magnesitwerke AG
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 Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of FR2401098A1 publication Critical patent/FR2401098A1/en
Application granted granted Critical
Publication of FR2401098B1 publication Critical patent/FR2401098B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
    • 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
    • C01F5/00—Compounds of magnesium
    • C01F5/02—Magnesia
    • C01F5/06—Magnesia by thermal decomposition of magnesium compounds
    • C01F5/10—Magnesia by thermal decomposition of magnesium compounds by thermal decomposition of magnesium chloride with water vapour

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Treating Waste Gases (AREA)

Abstract

Procédé pour préparer des oxydes métalliques consistant à dissoudre des matières de départ souillées dans de l'acide chlorhydrique, à concentrer la saumure obtenue, puis à la décomposer thermiquement dans un four. Pour l'opération de concentration de la saumure on pulvérise celle-ci en 26 dans le courant de gaz usé venant du four de décomposition et contenant du chlorure d'hydrogène, on recueille les gouttelettes de saumure qui ont traversé le courant de gaz usé et on pulvérise à nouveau au moins une partie de la saumure ainsi recueillie dans le gaz usé en écoulement, on la recueille après passage à travers le courant de gaz usé et on l'envoie dans l'écoulement commun de la saumure précitée, le pH de la saumure concentrée effluente étant maintenu dans un intervalle prédéterminé par réglage de la quantité de saumure soumise à pulvérisation répétee dans le courant de gaz usé. Ce procédé permet par exemple d'obtenir de l'oxyde de magnésium.A process for preparing metal oxides comprising dissolving soiled starting materials in hydrochloric acid, concentrating the resulting brine, and then thermally decomposing it in an oven. For the operation of concentrating the brine, the latter is sprayed at 26 into the stream of waste gas coming from the decomposition furnace and containing hydrogen chloride, the droplets of brine which have passed through the stream of waste gas are collected and at least a part of the brine thus collected is sprayed again into the flowing spent gas, collected after passing through the spent gas stream and sent to the common flow of the aforementioned brine, the pH of the effluent concentrate brine being maintained within a predetermined interval by controlling the amount of brine subjected to repeated spraying in the waste gas stream. This process makes it possible, for example, to obtain magnesium oxide.

FR7823994A 1977-08-22 1978-08-17 PROCESS FOR THE INDUSTRIAL PREPARATION OF METALLIC OXIDES, IN PARTICULAR MAGNESIUM OXIDE AND APPARATUS FOR CARRYING OUT THE PROCESS Granted FR2401098A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT605877A AT352081B (en) 1977-08-22 1977-08-22 PROCESS FOR THE LARGE-SCALE PRODUCTION OF METAL OXIDES, IN PARTICULAR MAGNESIUM OXIDE, AND DEVICE FOR CARRYING OUT THE PROCESS

Publications (2)

Publication Number Publication Date
FR2401098A1 true FR2401098A1 (en) 1979-03-23
FR2401098B1 FR2401098B1 (en) 1983-01-28

Family

ID=3582443

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7823994A Granted FR2401098A1 (en) 1977-08-22 1978-08-17 PROCESS FOR THE INDUSTRIAL PREPARATION OF METALLIC OXIDES, IN PARTICULAR MAGNESIUM OXIDE AND APPARATUS FOR CARRYING OUT THE PROCESS

Country Status (10)

Country Link
AT (1) AT352081B (en)
BR (1) BR7805368A (en)
CA (1) CA1115028A (en)
DE (1) DE2834560A1 (en)
ES (1) ES472721A1 (en)
FR (1) FR2401098A1 (en)
GB (1) GB2006175B (en)
GR (1) GR65340B (en)
IL (1) IL55334A (en)
IT (1) IT1115567B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354896A2 (en) * 1988-08-10 1990-02-14 Veitscher Magnesitwerke-Actien-Gesellschaft Magnesium oxide micropowder and its use

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2821368A1 (en) * 2013-07-03 2015-01-07 PURAC Biochem BV Method for processing magnesium chloride solutions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE721358C (en) * 1935-08-14 1942-06-02 Metallgesellschaft Ag Production of magnesium oxide from water-containing magnesium chloride solutions or melts
FR1299386A (en) * 1961-09-05 1962-07-20 Zentrale Forschungsstelle Fuer Process for producing magnesium oxide from solutions or salts containing magnesium chloride
DE2608567A1 (en) * 1975-03-19 1976-09-30 Oesterr Amerikan Magnesit Aq. magnesium chloride soln. concn. in thermal oxide prodn. - by introducing into hot waste gas from calciner and sintering furnace
FR2332235A1 (en) * 1975-11-20 1977-06-17 Veitscher Magnesitwerke Ag PREPARATION OF VERY PURE MAGNESIUM OXIDE AT THE INDUSTRIAL SCALE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE721358C (en) * 1935-08-14 1942-06-02 Metallgesellschaft Ag Production of magnesium oxide from water-containing magnesium chloride solutions or melts
FR1299386A (en) * 1961-09-05 1962-07-20 Zentrale Forschungsstelle Fuer Process for producing magnesium oxide from solutions or salts containing magnesium chloride
DE2608567A1 (en) * 1975-03-19 1976-09-30 Oesterr Amerikan Magnesit Aq. magnesium chloride soln. concn. in thermal oxide prodn. - by introducing into hot waste gas from calciner and sintering furnace
FR2332235A1 (en) * 1975-11-20 1977-06-17 Veitscher Magnesitwerke Ag PREPARATION OF VERY PURE MAGNESIUM OXIDE AT THE INDUSTRIAL SCALE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354896A2 (en) * 1988-08-10 1990-02-14 Veitscher Magnesitwerke-Actien-Gesellschaft Magnesium oxide micropowder and its use
WO1990001460A1 (en) * 1988-08-10 1990-02-22 Veitscher Magnesitwerke-Actien-Gesellschaft Magnesium oxide in fine powder form and its use
EP0354896A3 (en) * 1988-08-10 1990-03-14 Veitscher Magnesitwerke-Actien-Gesellschaft Magnesium oxide micropowder and its use

Also Published As

Publication number Publication date
AT352081B (en) 1979-08-27
CA1115028A (en) 1981-12-29
IL55334A (en) 1981-10-30
IT7868947A0 (en) 1978-08-21
FR2401098B1 (en) 1983-01-28
GB2006175B (en) 1982-04-21
BR7805368A (en) 1979-05-02
GR65340B (en) 1980-08-18
DE2834560A1 (en) 1979-03-01
GB2006175A (en) 1979-05-02
ATA605877A (en) 1979-02-15
IT1115567B (en) 1986-02-03
ES472721A1 (en) 1979-10-16
IL55334A0 (en) 1978-10-31

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Legal Events

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