05174861 is referenced by 13 patents and cites 67 patents.

A method for delignifying and bleaching a lignocellulosic pulp with a gaseous bleaching agent in a reactor without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ribbon flight, to disperse and advance the pulp particles in a plug flow manner while contacting and mixing the pulp particles with a gaseous bleaching agent such as ozone for substantially uniform bleaching thereof.

Title
Method of bleaching high consistency pulp with ozone
Application Number
604849
Publication Number
5174861
Application Date
August 28, 1991
Publication Date
December 29, 1992
Inventor
William H Friend
Savannah
GA, US
Thomas P Gandek
Trenton
NJ, US
Michael A Pikulin
Bound Brook
NJ, US
David E White
Pennington
NJ, US
Agent
Pennie & Edmonds
Assignee
Union Camp Patent Holdings
NJ, US
IPC
D21C 9/153
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