Process of pulping and bleaching fibrous plant material with tert-butyl alcohol and tert-butyl peroxide
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 12, 1993
Grant Date -
N/A
app pub date -
Sep 13, 1991
filing date -
Sep 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for producing bleached pulp from a fibrous plant material (e.g., wood), wherein the material is contacted with an alcohol solvent in a pulping zone to extract lignin from the fibrous plant material. The resulting pulp is then treated with a hydroperoxide or peroxide bleaching agent in a bleaching zone to form bleached pulp. Alcohol formed from the hydroperoxide or peroxide during the bleaching process may be recycled to the pulping zone. A preferred alcohol is tert-butyl alcohol, while a preferred hydroperoxide is tert-butyl hydroperoxide.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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