Process for preparing 1,6-.beta.-D-anhydroglucopyranose (levoglu

Details Process for preparing 1,6-.beta.-D-anhydroglucopyranose (levoglu Process for preparing 1,6-.beta.-D-anhydroglucopyranose (levoglu

1989-01-30

1991-06-11

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536127, 536 11, C07H 310, C07H 1900, C08B 3700, C13K 1300

Patent

active

050233300

ABSTRACT:
Process of preparing 1,6-.beta.-D-anhydroglucopyranose (levoglucosan) in high purity is described, where the starting material with a water-content, adjusted to max. 20%, is pyrolyzed, the volatile components are condensed and this distillate is neutralized. After filtration and optional treatment with an adsorbent, the mixture is chromatographically separated over an ion-exchange resin with water as eluent. Levoglucosan containing fractions are concentrated and crystalline levoglucosan is obtained by an evaporation - and/or cooling crystallization from a supersaturated water solution.

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