PROCESS FOR SEPARATING AND RECOVERING CONCENTRATED HYDROCHLORIC ACID FROM THE CRUDE PRODUCT OBTAINED FROM THE 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 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 the enriched organic solvent from the concentrated hydrochloric acid-depleted crude product, and (3) recovering the concentrated hydrochloric acid from the enriched organic solvent.