Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 2006
Issued Date -
N/A
app pub date -
Jan 26, 2001
filing date -
Jan 28, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Wood pulp is bleached using hydrogen peroxide as the oxidative bleaching agent in the presence of magnesium hydroxide or magnesium oxide. The bleaching process is carried out in the presence of magnesium hydroxide as the predominant, and preferably essential, source of alkali. The process optionally includes transition metal chelants, such as DTPA or EDTA in the bleaching slurry. The process eliminates the need for added caustic and silicate in such systems and can be carried out at or near neutral pH of 5.0 to 8.5.
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