Progressing batch hydrolysis process

Patent · Tue Oct 07 04:00:00 EDT 1986

OSTI ID:5092376

Wright, J D

This patent describes a progressive batch prehydrolysis and hydrolysis process for producing sugar from a lignocellulosic feedstock, comprising: (a) providing at least one percolation reactor, the reactor being initially charged with lignocellulosic feedstock including hemicellulose components and cellulose components, which feedstock has not been prehydrolyzed; (a) prehydrolyzing the feedstock by passing a liquid stream of dilute acid into and then serially through the reactors in (a); (c) cooling and recovering the dilute sugar containing acid stream after it exits the last reactor in (a); (d) providing at least one additional percolation reactor initially charged with the lignocellulosic feedstock including hemicellulose components and cellulose components, which feedstock has not been prehydrolyzed; (e) serially connecting the reactors in (a) to and upstream of the additional reactors in (d); (f) passing a liquid stream of dilute acid serially through the reactors in (a); (g) cooling the dilute acid stream containing sugar after exiting the last reactor in (f), and then prehydrolyzing the feedstock in the additional reactors in (d); and (h) cooling and recovering the dilute sugar containing acid stream after it exits the last reactor in (g).

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4615742
• OSTI ID: 5092376
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALDEHYDES
BIOSYNTHESIS
CARBOHYDRATES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COOLING
DECOMPOSITION
DILUTION
DISACCHARIDES
FLOW RATE
FLUID FLOW
GLUCOSE
HEMICELLULOSE
HEXOSES
HYDROLYSIS
LIGNIN
LIQUID FLOW
LYSIS
MONOSACCHARIDES
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
POLYSACCHARIDES
PRESSURE DEPENDENCE
SACCHARIDES
SACCHAROSE
SOLVOLYSIS
SYNTHESIS
TEMPERATURE DEPENDENCE
XYLOSE