Process for producing free hydroxylamine aqueous solution
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 26, 2002
Grant Date -
N/A
app pub date -
Jul 19, 2000
filing date -
Mar 13, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention provides a process for producing a free hydroxylamine aqueous solution, by letting an alkali react with separated sulfates, for conversion into ammonia and sulfates not containing any nitrogen atom, recovering the valuable ammonia and recycling it in the reaction system for effective use. This invention is a process for producing a free hydroxylamine aqueous solution, in which a free hydroxylamine aqueous solution is obtained by letting an aqueous solution or slurry containing hydroxylammonium sulfate and a gas mainly containing ammonia react with each other, mixing a solution mainly containing a lower alcohol with the produced aqueous solution or slurry, and separating the precipitated sulfates containing ammonium sulfate, comprising the steps of mixing an alkali with the separated sulfates, to produce ammonia gas, and recycling the ammonia in the reaction system.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully