Improved oxygen delignification of bisulfite pulps.

• The role of peracetic acid in improving a second oxygen delignification step of softwood bisulfite pulp was investigated.  The results showed that peracetic acid improved the degree of delignification in a second oxygen stage, probably by increasing the content of free phenolic hydroxyl groups and therefore making the lignin more receptive to a second oxygen stage.  Oxygen pressurized peracetic acid stages were also studied and compared to atm. peracetic acid stages.  Pressurized peracetic acid stages gave only a minor effect in lowering the Kappa no.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Polymerteknologi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Polymer Technologies (hsv//eng)

NATURVETENSKAP  -- Kemi -- Polymerkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Polymer Chemistry (hsv//eng)

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)