Process for separating and recovering concentrated hydrochloric acid from the crude product obtained from the acid hydrolysis of cellulose
US4237110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/0737
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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: PA1 (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, PA1 (2) separating the enriched organic solvent from the concentrated hydrochloric acid depleted crude product, and PA1 (3) recovering the concentrated hydrochloric acid from the enriched organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.