The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2008
Filed:
Jan. 26, 2004
Kaung-far Lin, Tainan, TW;
Jin-fu Chen, Lucao Township, Chiayi County, TW;
Wei Te Lin, Youngkang, TW;
Ruey-shing Chen, Tainan, TW;
Kung-chin Kuo, Youngkang, TW;
Kaung-Far Lin, Tainan, TW;
Jin-Fu Chen, Lucao Township, Chiayi County, TW;
Wei Te Lin, Youngkang, TW;
Ruey-Shing Chen, Tainan, TW;
Kung-Chin Kuo, Youngkang, TW;
San Fu Chemical Company, Ltd., Taipei, TW;
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.