Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Reexamination Certificate
2008-07-08
2008-07-08
O'Sullivan, Peter (Department: 1621)
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
C203S006000, C203S012000
Reexamination Certificate
active
07396519
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.
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Chen Jin-Fu
Chen Ruey-Shing
Kuo Kung-Chin
Lin Kaung-Far
Lin Wei Te
O'Sullivan Peter
San Fu Chemical Company, Ltd.
Sun Hsiang-ning
The SUN Law Office
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