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Oxygen-alkali bleaching

K Pfister, E Sjostrom. Characterization of spent bleaching liquors. Part 5. Composition of material dissolved during oxygen-alkali delignification. Pap Puu 61 525-528, 1979. [Pg.433]

Oxygen is readily evolved at the ordinary temperature on adding water to a mixture of bleaching powder and an alkali or alkaline earth peroxide in the presence of a catalyst such ns ferrous or copper sulphate. If the solid mixture is pressed into small lumps or cubes, it may be used in a Kipp s apparatus and thus afford a convenient method of preparing the gas for lecture or laboratory purposes.4... [Pg.24]

The residual lignin in a semi-bleached pulp such as oxygen-bleached pulps or chlorinated and alkali extracted pulps can be isolated using the same procedure as described previously. However, during the successive enzymatic hydrolyses, some residual lignin in the semi-bleached pulp becomes soluble in the acetate buffer solution. The water-soluble residual lignin can be isolated by combining... [Pg.72]

See other pages where Oxygen-alkali bleaching is mentioned: [Pg.161]    [Pg.161]    [Pg.455]    [Pg.155]    [Pg.54]    [Pg.405]    [Pg.95]    [Pg.900]    [Pg.95]    [Pg.223]    [Pg.40]    [Pg.78]    [Pg.244]    [Pg.247]    [Pg.253]    [Pg.254]    [Pg.271]    [Pg.273]    [Pg.283]    [Pg.297]    [Pg.156]    [Pg.200]    [Pg.993]    [Pg.1107]    [Pg.45]    [Pg.162]    [Pg.19]    [Pg.146]    [Pg.128]    [Pg.71]    [Pg.38]    [Pg.352]    [Pg.78]    [Pg.247]    [Pg.253]    [Pg.254]   


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Oxygen bleach

Oxygen bleaching

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