Pretreatment process for conversion of cellulose to fuel ethanol

Details Pretreatment process for conversion of cellulose to fuel ethanol Pretreatment process for conversion of cellulose to fuel ethanol

1997-06-09

1999-06-29

Lilling, Herbert J.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing compound containing saccharide radical

127 37, 435105, 435161, 435162, 435163, 435165, 435209, C12P 1914, C12P 706, C12P 714, C12P 710

Patent

active

059167807

ABSTRACT:
An improved pretreatment of cellulosic feedstocks, to enable economical ethanol production by enzyme treatment. The improved pretreatment comprises choosing either a feedstock with a ratio of arabinoxylan to total nonstarch polysaccharides (AX/NSP) of greater than about 0.39, or a selectively bred feedstock on the basis of an increased ratio of AX/NSP over a starting feedstock material, and reacting at conditions that disrupt the fiber structure and hydrolyze a portion of the cellulose and hemicellulose. This pretreatment produces a superior substrate for enzymatic hydrolysis, by enabling the production of more glucose with less cellulase enzyme than any known procedures. This pretreatment is uniquely suited to ethanol production. Preferred feedstocks with an AX/NSP level greater than about 0.39 include varieties of oat hulls and corn cobs.

REFERENCES:
patent: 4752579 (1988-06-01), Arena et al.

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