Process for recovering concentrated hydrochloric acid from crude product obtained from acid hydrolysis of cellulose.

摘要

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 (in 4) the crude product with an organic solvent consisting of at least one C5-C9 alcohol such that the organic solvent is enriched with the concentrated hydrochloric acid,(2) separating (in 8)theenrichedorganicso)ventfrom the concentrated hydrochloric acid-depleted crude product. and(3) recovering the concentrated hydrochloric acid from the enriched organic solvent.