METHOD FOR PRODUCING PULP HAVING LOW LIGNIN CONTENT FROM LIGNOCELLULOSIC MATERIAL
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
May 7, 2015
app pub date -
Apr 24, 2013
filing date -
May 3, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Loading Importance Indicators... 
Abstract
A method for the production of cellulose having a low lignin content characterized by a combination of the measures that
- a) a lignocellulosic material is treated with an aqueous solution comprising a C1-6-alcohol and having a pH from 10 to 14 at a temperature of below 100° C., whereupon the aqueous solution, in which lignin split off from the lignocellulose is present in dissolved form, is separated from the solid which represents a material enriched with cellulose and hemicellulose,b) hemicellulose is removed from the material of a) enriched with cellulose and hemicellulose,c) the material obtained in b), which is hemicellulose depleted, is treated with an alkali sulfite, an alkaline earth sulfite or ammonium sulfite, in particular Na2SO3 and/or with oxygen in aqueous alkaline solution, whereby lignin dissolves and cellulose having a low lignin content is obtained;as well as cellulose which can be produced by the method.
Loading the Abstract Image...
OK
First Claim
Family
Loading Family data...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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