Akzo Nobel N.v.

Eka Chemicals Ab

Eka Nobel

Maria Norell

Johan Landfors

Michael Persson

Rein Sikkar

Goran Sundstrom

Roy Hammer-Olsen

Helena Falgen

Lennart Nilsson

Bo Hangkansson

Caroline Westman

Janne Laine

ANGke Kjellander

Kalle Kettunen

A process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises draining the suspension to obtain a paper web and subjecting the obtained paper web to impulse pressing by passage through at least one press nip having at least one heated roll which is in contact with the web and heated to a temperature above 100&deg; C., wherein a chemical system comprising a polymer component and micro- or nanoparticles are added to the suspension or the paper web before the paper web passes the press nip of the impulse unit.

Process for the production of paper

A process for the production of paper in which cellulosic fibers are treated with microparticles comprising shell-formed carbon allotrope particles, paper obtainable from this process, and a drainage and/or retention agent comprising at least partially hydrophilic, anionic microparticles comprising shell-formed carbon allotrope particles.

The invention relates to a process for the production of paper on a paper machine containing a dilution headbox in which a main aqueous flow containing cellulosic fibres and filler is mixed in said headbox with a diluting aqueous flow to form a resulting aqueous flow which is ejected onto a wire and dewatered to form a web of paper, wherein one or more components providing improved retention are introduced into the main aqueous flow and an additive resulting in slower dewatering and/or being selected from non-ionic and anionic organic polymers is introduced into the diluting aqueous flow.

Production of polysulphide by electrolysis of white liquor containing

Disclosed is a process of producing chlorine dioxide having the steps of providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and phosphate; reducing chlorate ions in the reaction medium to form chlorine dioxide; withdrawing chlorine dioxide gas from the reaction medium; withdrawing reaction medium from the reactor and transferring it to an electrochemical cell; treating the reaction medium electrochemically to increase the acidity and decrease the content of alkali metal ions; recycling the acidified reaction medium to the reactor; and adding make up alkali metal chlorate to the reaction medium before or after the electrochemical cell.

Process of producing chlorine dioxide

Growing community of inventors

Hovas, Sweden

Maria Norell