Process for depolymerization and extraction of lignin

Details Process for depolymerization and extraction of lignin Process for depolymerization and extraction of lignin

D - Textiles, Paper

21

C

9/2

D21C 1/02 (2006.01) D21C 3/20 (2006.01)

Patent

CA 1147105

ABSTRACT OF THE DISCLOSURE Lignin is obtained in a depolymerized, soluble form from various hardwoods such as aspen by a process in which the hardwood in divided form is cooked with steam at carefully selected combinations of temperature and time, within the range 170-240°C and 2-80 minutes, and then solvent extracting the cooked wood material. It has been found that lignin undergoes a depolymerization reaction in situ in the hardwood on steam cooking, followed by a condensation and possible repolymerization reaction. The process of the present invention conducts the depolymerization reaction but substantially prevents the subsequent condensation reactions, by careful choice of time and temperature cooking conditions. The lignin so obtained in depolymerized form is useful as a chemical raw material.

350566

Affiliated with

Also associated with

Rating

Process for depolymerization and extraction of 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 Process for depolymerization and extraction of lignin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for depolymerization and extraction of lignin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-425579