| abstract |
ThenThe invention relates to a method for delignifying lignocellulosicnRaw materials, by using sulfites in the presence of an alkalinenComponent, especially sodium hydroxide or sodium carbonate orna mixture of these, in aqueousnsolutionnusing elevatednTemperature and increased pressure,ncharacterized in that tonBeginning of a digestion the waterynSulfite solutionnused and the temperature up to the maximum reaction temperaturenis increased, the alkaline component only after the beginningnof the digestion is added. |