FR1068369A - Method and apparatus for obtaining microspherical grain crystals - Google Patents

Method and apparatus for obtaining microspherical grain crystals

Info

Publication number
FR1068369A
FR1068369A FR1068369DA FR1068369A FR 1068369 A FR1068369 A FR 1068369A FR 1068369D A FR1068369D A FR 1068369DA FR 1068369 A FR1068369 A FR 1068369A
Authority
FR
France
Prior art keywords
microspherical
obtaining
grain crystals
crystals
grain
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
Application number
Other languages
French (fr)
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.)
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Original Assignee
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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 Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU filed Critical Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Application granted granted Critical
Publication of FR1068369A publication Critical patent/FR1068369A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
    • C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
    • C01F7/147—Apparatus for precipitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • 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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
    • C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
FR1068369D 1952-12-18 1952-12-18 Method and apparatus for obtaining microspherical grain crystals Expired FR1068369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1068369T 1952-12-18

Publications (1)

Publication Number Publication Date
FR1068369A true FR1068369A (en) 1954-06-24

Family

ID=9603724

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1068369D Expired FR1068369A (en) 1952-12-18 1952-12-18 Method and apparatus for obtaining microspherical grain crystals

Country Status (1)

Country Link
FR (1) FR1068369A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446799A1 (en) * 1979-01-18 1980-08-14 Aluminum Co Of America PROCESS FOR PRECIPITATION OF ALUMINUM HYDROXIDE IN DENSE PHASE FROM A MOTHER LIQUOR OBTAINED ACCORDING TO THE BAYER PROCESS
FR2659028A1 (en) * 1990-03-03 1991-09-06 Kali & Salz Ag PROCESS AND DEVICE FOR OBTAINING CRYSTALLIZATION PRODUCTS HAVING A DEFINED GRAIN SIZE FROM SURSATURED SOLUTIONS, IN PARTICULAR SALT SOLUTIONS.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446799A1 (en) * 1979-01-18 1980-08-14 Aluminum Co Of America PROCESS FOR PRECIPITATION OF ALUMINUM HYDROXIDE IN DENSE PHASE FROM A MOTHER LIQUOR OBTAINED ACCORDING TO THE BAYER PROCESS
US4530699A (en) * 1979-01-18 1985-07-23 Aluminum Company Of America Dense phase precipitation
FR2659028A1 (en) * 1990-03-03 1991-09-06 Kali & Salz Ag PROCESS AND DEVICE FOR OBTAINING CRYSTALLIZATION PRODUCTS HAVING A DEFINED GRAIN SIZE FROM SURSATURED SOLUTIONS, IN PARTICULAR SALT SOLUTIONS.

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