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D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
D01C1/00—Treatment of vegetable material
D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres
Verfahren zur Gewinnung von Alkalikarbonat aus Alkalisulfat auf nassem Wege durch Umsetzung der geloesten Sulfate mit frisch gefaelltem Erdalkalikarbonat, im besonderen Bariumkarbonat
Verfahren zur Regenerierung von Altpapier, bei welchem die Entfaerbungs- und Aufschliessungsfluessigkeit in einem Kreislauf durch die ruhende Altpapiermasse geschickt wird