Title:
METHOD FOR PRODUCING COBALT SULFATE CRYSTAL
Document Type and Number:
WIPO Patent Application WO/2023/062986
Kind Code:
A1
Abstract:
A method (40) for producing cobalt sulfate crystals which is for obtaining crystals of cobalt sulfate heptahydrate from an aqueous solution containing cobalt sulfate. The method comprises a crystallization step (10) in which an aqueous solution (11) containing cobalt sulfate is evaporated and concentrated to obtain a slurry (12) containing cobalt sulfate crystals, a separation step (20) in which the slurry (12) obtained in the crystallization step (10) is subjected to solid-liquid separation to obtain a dehydrated cake (21) of the cobalt sulfate crystals, and a drying step (30) in which the dehydrated cake (21) obtained in the separation step (20) is brought into direct contact with a drying medium (31) by flash drying and dried to obtain cobalt sulfate crystals (41).
Inventors:
OKUYAMA HIROKI (JP)
HARUTA TOMOAKI (JP)
OGAWA AYAKO (JP)
HARUTA TOMOAKI (JP)
OGAWA AYAKO (JP)
Application Number:
PCT/JP2022/033697
Publication Date:
April 20, 2023
Filing Date:
September 08, 2022
Export Citation:
Assignee:
TSUKISHIMA KIKAI CO (JP)
International Classes:
C01G51/10; B01D9/02; B04B3/00; B04B15/12; C22B3/44; C22B23/00
Domestic Patent References:
| WO2019530795A1 |
Foreign References:
| CN107837557A | 2018-03-27 | |||
| CN112831662A | 2021-05-25 | |||
| JP2021168713A | 2021-10-28 | |||
| JPS5757876A | 1982-04-07 | |||
| JPH0827132A | 1996-01-30 | |||
| JP2018001116A | 2018-01-11 |
Other References:
NANDI, P.N. ; KHER, V.G. ; WANKAR, G.B. ; DESHPANDE, D.A.: "Thermogravimetric analysis of cobalt sulfate", THERMOCHIMICA ACTA, vol. 41, no. 2, 1 November 1980 (1980-11-01), AMSTERDAM, NL. , pages 241 - 245, XP026552742, ISSN: 0040-6031, DOI: 10.1016/0040-6031(80)80069-4
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (JP)
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