Title:
SODIUM HYPOCHLORITE PENTAHYDRATE CRYSTAL POWDER, PRODUCTION METHOD THEREFOR, AND AQUEOUS SOLUTION OF SODIUM HYPOCHLORITE USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/105485
Kind Code:
A1
Abstract:
The present invention relates to a production method for a sodium hypochlorite pentahydrate crystal powder, said production method including a drying step in which a gas having a temperature of less than 25°C, a dew point of -2°C or lower, and a carbon dioxide gas concentration in the range of 250-1600 ppm inclusive is used to dry sodium hypochlorite pentahydrate crystals in a wet state including sodium hydroxide at a concentration of 0.01 wt% or higher, until the moisture content between crystals becomes 2.5 wt% or lower. The present invention also relates to a sodium hypochlorite pentahydrate crystal powder in which sodium carbonate is present on the surfaces of the sodium hypochlorite pentahydrate crystals, the sodium carbonate concentration is 0.1 wt% or higher, and the moisture content between crystals is 2.5 wt% or lower.
Inventors:
KUWAHATA MITSUYOSHI
Application Number:
PCT/JP2017/043050
Publication Date:
June 14, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
KANEKA CORP (JP)
International Classes:
C01B11/06
Domestic Patent References:
| WO2017208501A1 | 2017-12-07 |
Foreign References:
| JP2015533775A | 2015-11-26 | |||
| JP2014169215A | 2014-09-18 | |||
| JP2000290003A | 2000-10-17 | |||
| JPS4928354B1 | 1974-07-25 | |||
| JPS4537134B1 | ||||
| JPS45037134B1 | ||||
| JPS4928354B1 | 1974-07-25 | |||
| JP2000290003A | 2000-10-17 | |||
| JP2014169215A | 2014-09-18 |
Other References:
ARIHIRO HAMANO: "Research Reports of National Institute of Technology", vol. 7, 2 September 1970, SASEBO COLLEGE, article "Jiaensosansoda Kesshou no Bunkaisokudo (Decomposition Rate of Sodium Hypochlorite Crystals", pages: 131 - 138
Attorney, Agent or Firm:
IKEUCHI SATO & PARTNER PATENT ATTORNEYS (JP)
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