Isolation of levoglucosan from pyrolysis oil derived from cellul

Details Isolation of levoglucosan from pyrolysis oil derived from cellul Isolation of levoglucosan from pyrolysis oil derived from cellul

1992-09-04

1994-12-06

Robinson, Douglas W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536124, C07H 100, C07H 106

Patent

active

053712129

ABSTRACT:
High purity levoglucosan is obtained from pyrolysis oil derived from cellulose by: mixing pyrolysis oil with water and a basic metal hydroxide, oxide, or salt in amount sufficient to elevate pH values to a range of from about 12 to about 12.5, and adding an amount of the hydroxide, oxide, or salt in excess of the amount needed to obtain the pH range until colored materials of impurities from the oil are removed and a slurry is formed; drying the slurry azeotropically with methyl isobutyl ketone solvent to form a residue, and further drying the residue by evaporation; reducing the residue into a powder; continuously extracting the powder residue with ethyl acetate to provide a levoglucosan-rich extract; and concentrating the extract by removing ethyl acetate to provide crystalline levoglucosan. Preferably, Ca(OH).sub.2 is added to adjust the pH to the elevated values, and then Ca(OH).sub.2 is added in an excess amount needed.

REFERENCES:
patent: 3235541 (1966-02-01), Carlson
patent: 3309356 (1967-03-01), Esterer
patent: 3374222 (1968-03-01), Peniston
patent: 3478012 (1969-11-01), Wolff et al.
patent: 4153514 (1979-05-01), Garrett et al.
patent: 4880473 (1989-11-01), Scott et al.
patent: 4891459 (1990-01-01), Knight et al.
patent: 5023330 (1991-06-01), Gander et al.
patent: 5180669 (1993-01-01), Antrim
M. Cerny et al., Carbohydr. Res. 1988, 174, 349.

Affiliated with

Also associated with

Rating

Isolation of levoglucosan from pyrolysis oil derived from cellul does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Isolation of levoglucosan from pyrolysis oil derived from cellul, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isolation of levoglucosan from pyrolysis oil derived from cellul will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-215557