Solvay Interox (societe Anonyme)

Other

Johan Devenyns

Nicholas A Troughton

Pierre Ledoux

Rene Detroz

Paul Essemaeker

Fran&ccedil;ois Desprez

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 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

Process for improving the selectivity of the delignification of a chemical paper pulp by employing a peroxyacid, in which the unbleached pulp originating from the cooking operation is treated with an aqueous solution of this organic peroxyacid in the presence of at least one stabilizer selected from phosphonic acids and their salts.

A process for delignifying pulp with organic peroxyacid in the presence

Growing community of inventors

Brussels, Belgium

Johan Devenyns