Process for converting cellulosic materials into fuels and chemicals

Patent · Tue Sep 20 00:00:00 EDT 1994

OSTI ID:6902735

Scott, C D; Faison, B D; Davison, B H; Woodward, J

A process is described for converting cellulosic materials, such as waste paper, into fuels and chemicals utilizing enzymatic hydrolysis of the major constituent of paper, cellulose. A waste paper slurry is contacted by cellulase in an agitated hydrolyzer. The cellulase is produced from a continuous, columnar, fluidized-bed bioreactor utilizing immobilized microorganisms. An attrition mill and a cellobiase reactor are coupled to the agitated hydrolyzer to improve reaction efficiency. The cellulase is recycled by an adsorption process. The resulting crude sugars are converted to dilute product in a fluidized-bed bioreactor utilizing microorganisms. The dilute product is concentrated and purified by utilizing distillation and/or a biparticle fluidized-bed bioreactor system. 1 fig.

• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
• Patent Number(s): US 5348871; A
• Application Number: PPN: US 7-884506
• OSTI ID: 6902735
• Resource Relation: Patent File Date: 15 May 1992
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
CELLULOSE
ENZYMATIC HYDROLYSIS
LIQUID FUELS
BIOSYNTHESIS
PAPER
SACCHARIDES
BIOCONVERSION
BIOREACTORS
CHEMICAL FEEDSTOCKS
ENZYMES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
FUELS
HYDROLYSIS
LYSIS
MATERIALS
ORGANIC COMPOUNDS
POLYSACCHARIDES
PROTEINS
RAW MATERIALS
SOLVOLYSIS
SYNTHESIS
090900* - Biomass Fuels- Processing- (1990-)