Concentrated sulfuric acid hydrolysis of lignocellulosics

Details Concentrated sulfuric acid hydrolysis of lignocellulosics Concentrated sulfuric acid hydrolysis of lignocellulosics

1999-08-27

2000-05-16

Brunsman, David

Sugar, starch, and carbohydrates

Apparatus

Hydrolyzing

106 37, C13K 106

Patent

active

060632046

ABSTRACT:
A process, system, and apparatus for effectively and economically producing fermentable sugars from cellulosic feedstocks is described. The economic viability of using wood and/or agricultural waste, containing large fractions of cellulose and hemicellulose is highly dependent on the method used for hydrolysis. Underlying the gist of this invention are newly discovered methods, means, and techniques by which both the pentosans and hexosans comprising the hemicellulose fraction of the selected feedstock and the hexosans comprising the cellulose fraction of the selected feedstock can be quickly and efficiently converted in a single pass through a single device to fermentable sugars containing minimal quantities of degradation products known to inhibit fermentation. Successful operation of this new hydrolysis process employing a new reactor design can produce fermentable sugars at rates and efficiencies previously thought unattainable by reducing the number of processing steps, pieces of equipment, and unit operation previously used.

REFERENCES:
patent: 5972118 (1999-10-01), Hester et al.

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