PULPING WITH ORGANIC CYCLIC COMPOUND AND SALT OF DIVALENT METL IN ALKALI
A compsn. for increasing the yield of paper pulp derived from lignocellulosic materials comprises:- (a) 0.01-1.5 wt.% anthraquinone, and (b) 0.01-10 wt.% of a divalent metal salt comprising Ca, Ba, Sr, Mg or Zn salt, based on the lignocellulosic material. Also claimed is a process for the delignific...
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| Sprache: | eng |
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| Zusammenfassung: | A compsn. for increasing the yield of paper pulp derived from lignocellulosic materials comprises:- (a) 0.01-1.5 wt.% anthraquinone, and (b) 0.01-10 wt.% of a divalent metal salt comprising Ca, Ba, Sr, Mg or Zn salt, based on the lignocellulosic material. Also claimed is a process for the delignification of lignocellulosic materials by treating the latter with an alkaline digesting liquor contg. the above compsn. and up to 50 vol.% of the spent liquor. |
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