Allen V Forster

US Patent:

42371104, Dec 2, 1980

Filed:

Apr 30, 1979

Appl. No.:

6/034784

Inventors:

Allen V. Forster - Midland MI
Lyle E. Martz - Midland MI
Douglas E. Leng - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C01B 708
C13K 104

US Classification:

423488

Abstract:

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.