Process for converting cellulosic materials into fuels and chemicals

Patent · Tue Sep 20 04:00:00 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): A; US 5348871
• Application Number: PPN: US 7-884506
• OSTI ID: 6902735
• Country of Publication: United States
• Language: English

Related Subjects

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