Solvay Interox Gmbh

Solvay Interox (societe Anonyme)

Other

The State University of New York

Interox Chemicals Limited

Nicholas A Troughton

Johan Devenyns

Alun P James

Raymond C Francis

Pierre Ledoux

Graham R Horne

Graham Carr

Rene Detroz

Paul Essemaeker

Marcel Robberechts

Marc Hoyos

Fran&ccedil;ois Desprez

Andrew J Willson

Xioa-Zhu Zhang

Gilbert Vrambout

Francedillaois Desprez

Process for bleaching a chemical paper pulp to a brightness of at least 89&deg; ISO, consisting in subjecting the pulp to a treatment sequence of several stages including a final bleaching stage with hydrogen peroxide in alkaline medium carried out in the presence of at least one stabilising agent and at a consistency of at least 25% by weight of solids, the stages preceding this final stage having purified the pulp so that its manganese content does not exceed 3 ppm by weight with respect to the solids and that the pulp has been delignified beforehand to a kappa number not exceeding 5.

Multi-stage bleaching process having a final stabilized peroxide stage

Process for bleaching a chemical paper pulp in an

Process for bleaching a chemical paper pulp by means of a sequence of treatment stages involving at least one stage with an enzyme and at least one stage with a peroxyacid.

Process for bleaching a pulp in a sequence including an enzyme stage

A process for delignifying a lignocellulosic material comprising exposing the material to a mixture of peracid and ozone. Preferred peracids include Caro's acid and peracetic acid. Also disclosed is a kraft pulp delignification mixture comprising in combination: (a) water; (b) a kraft pulp at 1-40% consistency; (c) a peracid; and (d) from 0.1 to 5.0% ozone on pulp.

Ozone/peroxymonosulfate process for delignifying a lignocellulosic

Peroxidic compositions

Peroxyacid manufacture

Growing community of inventors

Brussels, Belgium

Nicholas A Troughton