A method of producing cellulosic pulp

• Mechanical and chemimechanical cellulose pulp, particularly paper pulp, is produced at a low energy input by disintegrating and beating wood material in one or more stages. Acccording to the invention, a substance capable of forming complexes with polyvalent metal ions, particularly calcium ions, so-called complexing agent, is added to the wood material prior to the beating process in order to replace said calcium or other polyvalent metal ions with sodium ions, therewith a further reduction in the energy input is obtained.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

Nyckelord

ion exchange

complexing agent

mechanical pulping

chemimechanical pulping

low consistency refining

high consistency refiningchanical pulping

chemimechanical pulping

low consistency refining

high consistency refining

Publikations- och innehållstyp

pop (ämneskategori)

pat (ämneskategori)