C - Chemistry – Metallurgy – 08 – H
Patent
C - Chemistry, Metallurgy
08
H
260/133
C08H 6/00 (2010.01)
Patent
CA 1095511
ABSTRACT OF THE DISCLOSURE: A method of condensing and/or polymerising sulfonated lignin containing materials to substantially water soluble products. The method comprises adjusting the pH of the material such that a 3 % aqueous solution of the material has a pH below 7, adjusting the moisture content of the pH adjusted material to a value from 1 to 15%, and subjecting the resulting material to a heat treatment at a temperature range from 80 to 225°C in a manner to maintain the moisture content of the material at a value sufficient to allow the conversion to proceed, but less than 15%, and for a time period sufficient to form products having a viscosity at least 25% higher than the viscosity of the starting material, the vis- cosities being measured in a 50% aqueous solution at room tem- perature. Polymers based on sulfonated lignins are thus produced in a substantially dry state and at relatively low temperature and the end products obtained exhibit remarkably increased viscosities.
291644
Ashorn Theodore
Laine Paul
Robic Robic & Associes/associates
Serlachius (g. A.) Oy
LandOfFree
Method of condensing and/or polymerising sulfonated lignin... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of condensing and/or polymerising sulfonated lignin..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of condensing and/or polymerising sulfonated lignin... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-39594