Process for treating biomass to produce materials useful for biofuels
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United States of America Patent
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Jan 23, 2018
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Aug 13, 2015
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Aug 14, 2014
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Abstract
Since biomass is always accompanied by caustic inorganic materials, we have found that the formation of the anion salt of α-hydroxysulfonic acid represent the largest “loss” of the α-hydroxysulfonic acid in the potential reversible acid pretreatment process. By titrating the α-hydroxysulfonic acid salt with strong mineral acid and then reverting the alfa-hydroxysulfonic acid as its primary components, the acid components can be recovered substantially quantitatively.
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