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| Number | Title | Issue Date |
| 4025356 | Method for continuous hydrolysis of pentose containing material and apparatus for implementing the method Method and apparatus for the continuous acid hydrolysis of pentosan-containing material at a temperature between 80° and 120° C and at a pH lower than 5. At least two portions of hydrolysate are re-cycled back into the hydrolysis vessel. One recycle ... | 05/24/1977 |
| 4023982 | Apparatus for the production of sugars from hemi-cellulose-containing raw materials The apparatus operates on a continuous basis under gravity flow to extract sugars from hemi-cellulose-containing raw material such as xylose from xylan-containing raw materials. The apparatus includes a sequence of interconnected vessels to steam heat the... | 05/17/1977 |
