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Title:
高純度かつ高濃度の遊離型ヒドロキシルアミンの製造方法
Document Type and Number:
Japanese Patent JP4350654
Kind Code:
B2
Abstract:
A high purity aqueous solution of hydroxylamine product is prepared by treating an aqueous solution of hydroxylammonium salt with a base like ammonia at low temperatures. A novel process can be carried out by separating the ammonium salt side product from hydroxylamine with a low temperature filtration and a resin-exchange process. The concentration of the hydroxylamine product is further improved by a safe distillation process that produces a high purity and high concentration hydroxylamine product with reduced risks of explosion.

Inventors:
Mitsuka Hayashi
Hayashi Iitoku
Prosperity
Guo
Chen Rui Xing
Application Number:
JP2005018773A
Publication Date:
October 21, 2009
Filing Date:
January 26, 2005
Export Citation:
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Assignee:
Mifuku Chemical Industry Co., Ltd.
International Classes:
C01B21/14; C07C239/20
Domestic Patent References:
JP2005506944A
JP2002068718A
JP2001510133A
JP2001522345A
JP2005504704A
JP2002012416A
JP2002504062A
Attorney, Agent or Firm:
Kenji Yoshitake
Yukitaka Nakamura
Konno Akio
Noritaka Yokota
Mari Asano