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AssigneeThe Dow Chemical Company
InventorsAllen V. Forster, Lyle E. Martz, Douglas E. Leng
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The crude product obtained from the acid hydrolysis of cellulose, the product comprising concentrated hydrochloric acid and the various sugars obtained from the acid hydrolysis of cellulose, is separated into a first fraction comprising concentrated hydrochloric acid and a second fraction comprising the sugars by a process comprising: (1) contacting the crude product with an organic solvent consisting essentially of at least one C.sub.5 -C.sub.9 alcohol such that the organic solvent is enriched with the concentrated hydrochloric acid, (2) separating the enriched organic solvent from the concentrated hydrochloric acid depleted crude product, and (3) recovering the concentrated hydrochloric acid from the enriched organic solvent.
A process for separating and recovering concentrated hydrochloric acid from the crude product produced from the acid hydrolysis of a cellulose-containing material, the crude product comprising concentrated hydrochloric acid and the sugars produced from the acid hydrolysis of the cellulose-containing material, into a first fraction comprising the concentrated hydrochloric acid and a second fraction comprising the sugars, the process comprising:
Dependencies are inferred from the claim text.