Bau- Und Forschungsgesellschaft Thermoform Ag

Werner Schweers

Karl-Heinz Brachthauser

Hans-Hermann Dietrichs

Michael Sinner

Jurgen Puls

A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.

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Reinbek, Germany

Werner Schweers