Organosolv pulping Introduction Pulping of non-wood feedstocks as well as wood raw materials with organic solvents (“organosolv methods”), an approach dating back to the beginning of the 1930s (Theodor N. Kleinert and Kurt von Tayenthal),1 was not seriously considered for practical application until the 1980s.2-11 The idea was to use basically “lignin solvents” for this
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