Recovery of inorganic salt during processing of lignocellulosic feedstocks
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United States of America Patent
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Dec 16, 2014
Issued Date -
N/A
app pub date -
Aug 8, 2012
filing date -
Apr 13, 2004
priority date (Note) -
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Abstract
A method for recovering inorganic salt during processing of a lignocellulosic feedstock is provided. The method comprises pretreating the lignocellulosic feedstock by adding an acid to the feedstock to produce a pretreated lignocellulosic feedstock. A soluble base is then added to the pretreated lignocellulosic feedstock to adjust the pH and produce a neutralized feedstock. The neutralized feedstock is then enzymatically hydrolyzed to produce an enzyme hydrolyzed feedstock and a sugar stream. Inorganic salt is recovered from either a stream obtained from the lignocellulosic feedstock prior to the step of pretreating, a stream obtained from the pretreated lignocellulosic feedstock, a stream obtained from the neutralized feedstock, a stream obtained from the sugar stream, or a combination of these streams. The inorganic salt may be concentrated, clarified, recovered and purified by crystallization, electrodialysis drying, or agglomeration and granulation, and then used as desired, for example as a fertilizer.
First Claim
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International Classification(s)
- B01B:BOILING; BOILING APPARATUS
- C05F:ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05....
- C12P:FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESI....
- C05D:INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C....
- C05C:NITROGENOUS FERTILISERS
- C05B:PHOSPHATIC FERTILISERS
- C13K:GLUCOSE; INVERT SUGAR; LACTOSE; MALTOSE; SYNTHESIS....
- B01D:SEPARATION
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