Title:
METHOD FOR PRODUCING PYROPHOSPHATE
Document Type and Number:
WIPO Patent Application WO/2014/132814
Kind Code:
A1
Abstract:
The present invention provides a method for efficiently producing, at high yields, pyrophosphate, particularly melamine pyrophosphate, which is useful as a flame retardant. Specifically provided is a method for calcining orthophosphate, preferably melamine orthophosphate, in the presence of silicone oil, preferably methyl phenyl silicone oil, preferably in a temperature range of 120 to 350°C. A hot air dryer, a kneader, a Henschel mixer, a fluidized bed dryer, a rotary kiln, a paddle dryer, an extruder, a vibration dryer, a far-infrared conveyor oven, a microwave kiln, or the like, may be used as a calciner.
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Inventors:
HARADA GENTA (JP)
YONEZAWA YUTAKA (JP)
NAKAMURA MICHIO (JP)
OKAMOTO YURI (JP)
OMORI KOHEI (JP)
YONEZAWA YUTAKA (JP)
NAKAMURA MICHIO (JP)
OKAMOTO YURI (JP)
OMORI KOHEI (JP)
Application Number:
PCT/JP2014/053459
Publication Date:
September 04, 2014
Filing Date:
February 14, 2014
Export Citation:
Assignee:
ADEKA CORP (JP)
International Classes:
C01B25/42; C07D251/54; C07F9/6521
Domestic Patent References:
| WO2012032728A1 | 2012-03-15 |
Foreign References:
| JP2009001435A | 2009-01-08 | |||
| JPS4925675B1 | 1974-07-02 | |||
| US4950757A | 1990-08-21 | |||
| JPS4028594B1 | 1965-12-18 | |||
| JP2001026597A | 2001-01-30 | |||
| US20130294994A1 | 2013-11-07 |
Other References:
IKUTARO TAYAMA ET AL.: "Rinsan'en no Kagaku to Riyo", KABUSHIKI KAISHA KAGAKU KOGYOSHA, 1 March 1969 (1969-03-01), pages 141
Attorney, Agent or Firm:
HATORI, Osamu (JP)
Osamu Hatori (JP)
Osamu Hatori (JP)
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