Progressing batch hydrolysis process
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
- Resource Relation:
- Patent File Date: Filed date 10 Jan 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GLUCOSE
BIOSYNTHESIS
HEMICELLULOSE
HYDROLYSIS
LIGNIN
SACCHAROSE
XYLOSE
CHEMICAL REACTORS
COOLING
DILUTION
FLOW RATE
LIQUID FLOW
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
ALDEHYDES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
DISACCHARIDES
FLUID FLOW
HEXOSES
LYSIS
MONOSACCHARIDES
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
SYNTHESIS
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)