EP 2580249 A1 20130417 - MODIFICATION OF XYLAN
Title (en)
MODIFICATION OF XYLAN
Title (de)
MODIFIKATION VON XYLAN
Title (fr)
MODIFICATION DE XYLANE
Publication
Application
Priority
- ZA 201003273 A 20100608
- IB 2011001250 W 20110607
Abstract (en)
[origin: WO2011154807A1] The invention provides a method of modifying soluble xylan which contains glucuronic acid and/or arabinose side chains so that it can be adsorbed onto other substrates. The method includes the steps of enzymatically modifying the xylan by selectively removing glucuronic acid and/or arabinose side chains from the xylan with a -D-glucuronidase and/or a -L-arabinofuranosidase, and allowing the modified xylan to adsorb onto the substrate. The substrate may be a cellulosic substrate like pulp or paper or a non-cellulosic substrate. The enzymes are able to remove a sufficient number of the xylan side chains so as to decrease water solubility of the xylan, induce xylan precipitation and allow adsorption of the xylan onto other substrates. A pulping process which incorporates modification of xylan and adsorption onto cellulosic material is also provided, as are products which contain the modified xylan.
IPC 8 full level
C08B 37/14 (2006.01); C09D 105/14 (2006.01); C12P 19/04 (2006.01); D21H 11/20 (2006.01)
CPC (source: EP US)
C09D 105/14 (2013.01 - EP US); C12P 19/04 (2013.01 - EP US); C12Y 302/01055 (2013.01 - EP US); C12Y 302/01139 (2013.01 - EP US); D21C 9/005 (2013.01 - EP US); D21H 11/20 (2013.01 - EP US); D21H 17/24 (2013.01 - US); C12P 2203/00 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011154807 A1 20111215; EP 2580249 A1 20130417; EP 2580249 A4 20141001; US 2013233501 A1 20130912; ZA 201209407 B 20130828
DOCDB simple family (application)
IB 2011001250 W 20110607; EP 11792012 A 20110607; US 201113703223 A 20110607; ZA 201209407 A 20121212