Title:
アルミナの製造方法と装置
Document Type and Number:
Japanese Patent JP3755826
Kind Code:
B2
Abstract:
PCT No. PCT/JP94/02065 Sec. 371 Date Jun. 7, 1996 Sec. 102(e) Date Jun. 7, 1996 PCT Filed Dec. 8, 1994 PCT Pub. No. WO95/15920 PCT Pub. Date Jun. 15, 1995In the present invention, alumina is produced by a process comprising leading a starting aqueous slurry containing a seed alumina hydrate to a circulating system, the aqueous slurry being circulated and returned to the starting aqueous slurry, wherein an aqueous solution of an aluminum salt and an aqueous solution of a neutralizer are added to the aqueous slurry being circulated and mixed together at a pH value of 6 to 11 to thereby cause the aqueous slurry to contain formed alumina hydrate prior to the return to the starting aqueous slurry. The production of alumina is performed in an apparatus comprising a vessel equipped with an agitator for accommodating an aqueous slurry therein and a circulating device capable of leading the aqueous slurry outside the vessel and causing the aqueous slurry to circulate and return into the vessel, the above circulating device being provided at its aqueous slurry flowback zone with a first liquid addition device adapted to add an aqueous solution of an aluminum salt to the aqueous slurry being circulated and with a second liquid addition device adapted to add an aqueous solution of a neutralizer to the aqueous slurry being circulated, which apparatus further comprises a mixer adapted to mix together the aqueous slurry being circulated, the aqueous solution of the aluminum salt and the aqueous solution of the neutralizer.
Inventors:
Hiroshi Matsumoto
Hiroki Arao
Morio Fukuda
Hiroki Arao
Morio Fukuda
Application Number:
JP51609795A
Publication Date:
March 15, 2006
Filing Date:
December 08, 1994
Export Citation:
Assignee:
Catalyst Kasei Kogyo Co., Ltd.
International Classes:
B01J20/08; B01J21/04; C01F7/141; C01F7/34; C04B35/111; C04B35/626; C04B38/00
Domestic Patent References:
| JP21767B2 | ||||
| JP132169B2 | ||||
| JP4716424B1 | ||||
| JP57140316A | ||||
| JP6050721B2 |
Attorney, Agent or Firm:
Shunichiro Suzuki