Procedure for adding a filler into a pulp based on cellulose fibres

Petri Silenius (Inventor), Markku Leskelä (Inventor), Johan Gullichsen (Inventor), Esa Halinen (Inventor)

Research output: Patent

Abstract

The invention relates to a procedure for adding a filler into a pulp based on cellulose fibres, in which the pulp is fluidized and the filler is added into it. Preferably the pulp is stirred in the fluidized state while the filler is being added. The pulp is preferably at a medium consistency when the filler is being added. Preferably the filler added into the pulp is calcium hydroxide and the calcium carbonate is precipitated with carbon dioxide.
Original languageEnglish
Patent numberEP0791685
IPCD21H 17/ 70 A N
Priority date20/02/1996
Publication statusPublished - 27 Aug 1997
MoE publication typeH1 Granted patent

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