Bookcover of PRE-HYDROLYSIS OF THE PHENYL GLYCOSIDIC BOND IN A MODEL COMPOUND
Booktitle:

PRE-HYDROLYSIS OF THE PHENYL GLYCOSIDIC BOND IN A MODEL COMPOUND

Simulation of cleavage in lignin-carbohydrate bond using model compound, phenyl-β-D-glucopyranoside

VDM Verlag Dr. Müller (2009-08-28 )

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ISBN-13:

978-3-639-19316-9

ISBN-10:
3639193164
EAN:
9783639193169
Book language:
English
Blurb/Shorttext:
The pre-hydrolysis conditions were chosen to simulate different pretreatment methods such as auto hydrolysis, green liquor pretreatment and acid hydrolysis. It was found that hydrolysis of the phenyl-glucoside model compound at near neutral aqueous conditions (pH 6) was minimal (4 %) at 170°C. On the other hand hydrolysis was nearly complete (95 %) at this temperature with the addition of acetic acid at a concentration expected to be generated from deacetylation of xylan in hardwoods(about 10 g/L). At acid conditions of pH 1.65 the temperature may be lowered to 105 or 121 °C while still obtaining a significant (80-90 %) hydrolysis yield.The hydrolysis experiments performed simulating green liquor extraction showed as previously reported that the hydrolysis of phenyl-glucoside produces phenol and levoglucosan while no glucose is formed.The result showed that hydrolysis of the phenyl-glucoside at 155 °C was essentially complete with quantitative formation of levoglucosan and phenol rather than glucose and phenol.
Publishing house:
VDM Verlag Dr. Müller
Website:
http://www.vdm-verlag.de
By (author) :
Sagar Deshpande
Number of pages:
76
Published on:
2009-08-28
Stock:
Available
Category:
Technology
Price:
49.00 €
Keywords:
Lignin-Carbohydrate bonds, Glycosidic bond, Hydrolysis of phenyl-glucoside bonding, Acetylation of Alditols, GC-MS acetylation, GC-MS phenol extraction, Green liquor extraction, Formation of levoglucosan, Green liquor extraction

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