JPS5711821A - Preparation of both coarse granule and fine granule of alumina - Google Patents

Preparation of both coarse granule and fine granule of alumina

Info

Publication number
JPS5711821A
JPS5711821A JP8644480A JP8644480A JPS5711821A JP S5711821 A JPS5711821 A JP S5711821A JP 8644480 A JP8644480 A JP 8644480A JP 8644480 A JP8644480 A JP 8644480A JP S5711821 A JPS5711821 A JP S5711821A
Authority
JP
Japan
Prior art keywords
granule
seed
alumina
classifying device
tank
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
JP8644480A
Other languages
Japanese (ja)
Inventor
Atsushi Okawa
Koichi Oota
Nobuyuki Suzuki
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.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal Co Ltd
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 Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to JP8644480A priority Critical patent/JPS5711821A/en
Publication of JPS5711821A publication Critical patent/JPS5711821A/en
Pending 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

Landscapes

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

Abstract

PURPOSE: To prepare both coarse granule of alumina and fine granule of alumina in good productivity using one dipositing line, by adding a relatively small amount of seed in the former stage of the depositing process of Al(OH)3 so that the seed is agglomerated and coarse granule Al(OH)3 is deposited and separated, followed by adding a large amount of seed to the filtrate so that fine granule part is separated.
CONSTITUTION: The highly concentrated Na3AlO3 solution 2 is introduced to the depositing tank 21, to which an under flow containing finely divided Al(OH)3 particles, namely seed, of the classifying device 25 is partially added 9. The seed is agglomerated in the depositing solution, grown, and fed 4 to the classifying device 23. Coarse granule Al(OH)3 is collected from the lower part of the classifying device 23, and it is washed and calcined to give coarse granule of alumina. While an over flow of the classifying device 23 is sent to the latter stage of depositing tank 22, to which the residue of the under flow of the classifying device 25 as seed is added 10. After a given amount of the cyrstal of Al(OH)3 is deposited in the tank 22, the solution in the tank 22 is sent to the classifying device 24, fine granule Al(OH)3 separated from the under flow is washed and calcined to give fine granule of alumina.
COPYRIGHT: (C)1982,JPO&Japio
JP8644480A 1980-06-27 1980-06-27 Preparation of both coarse granule and fine granule of alumina Pending JPS5711821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8644480A JPS5711821A (en) 1980-06-27 1980-06-27 Preparation of both coarse granule and fine granule of alumina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8644480A JPS5711821A (en) 1980-06-27 1980-06-27 Preparation of both coarse granule and fine granule of alumina

Publications (1)

Publication Number Publication Date
JPS5711821A true JPS5711821A (en) 1982-01-21

Family

ID=13887082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8644480A Pending JPS5711821A (en) 1980-06-27 1980-06-27 Preparation of both coarse granule and fine granule of alumina

Country Status (1)

Country Link
JP (1) JPS5711821A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529877A1 (en) * 1982-07-08 1984-01-13 Pechiney Aluminium PROCESS FOR THE PRODUCTION OF LARGE GRANULOMETRY ALUMINUM TRIHYDROXIDE
JP2009242136A (en) * 2008-03-28 2009-10-22 Sumitomo Chemical Co Ltd Production method of aluminum hydroxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529877A1 (en) * 1982-07-08 1984-01-13 Pechiney Aluminium PROCESS FOR THE PRODUCTION OF LARGE GRANULOMETRY ALUMINUM TRIHYDROXIDE
JP2009242136A (en) * 2008-03-28 2009-10-22 Sumitomo Chemical Co Ltd Production method of aluminum hydroxide

Similar Documents

Publication Publication Date Title
ES485553A1 (en) Process for the manufacture of coarse aluminum hydroxide
JPS57140316A (en) Manufacture of coarse granular aluminum hydroxide
CN105480994B (en) Efficient method for enriching oxalate through washing of fine seeds
JPS5711821A (en) Preparation of both coarse granule and fine granule of alumina
CA2097934A1 (en) Using polyglycerines in the bayer process to increase crystal size of the product
US4051222A (en) Coarsening of partially calcined alumina dust
Wise New occurrence of faujasite in southeastern California
JPS577812A (en) Removing method for fluorine from waste sulfuric acid
US3607140A (en) Preparation of alumina of improved purity by iron removal
US2543660A (en) Method of producing starch from starch milk
JPS5558983A (en) Cutter
CA2163826A1 (en) Process for the precipitation of aluminum trihydroxide from a supersaturated sodium aluminate solution
RU2184703C2 (en) Method of processing aluminate solution in production of alumina from nepheline
SU695646A1 (en) Method of obtaining crushed cocoa
JPS573713A (en) Production of a-type zeolite
SU1754656A1 (en) Method of producing calcium hexaborate
JPS5515448A (en) Method and apparatus for separation of lymphocytes
SU905197A1 (en) Method for processing polydispersed mixture, preferably aluminate cakes
JPS5351571A (en) Decanter-type centrifugal precipitation apparatus
DE2627870C2 (en) Process for the production of coarsely crystalline sodium chloride
JPS57202298A (en) Preparation of cyclodextrin
JPS56144742A (en) Activated carbon composition
JPS5663827A (en) Rhodium separating and recovering method
JPS5329298A (en) Production of recovered aluminum sulfate
JPS57106518A (en) Manufacture of x-type zeolite composed of fine crystalline particles