Ahlstrom Research & Services

Ahlstrom Corporation

Elf Antar France

Ahlstrom Paper Group Research & Competence Center

Other

Joseph Dussaud

Pierre Girard

Bernard Michel Bossand

Pascale Escaffre

Francois-Pierre Navarre

Léonie Bouvier

L&eacute;onie Bouvier

Menno Dufour

Gilles Gauthier

Hanna Rahiala

Jean-Claude Roux

Pierre Pichat

Virginie Blondeau-Patissier

Estelle Mietton-Ceulemans

Alexis Steinbrunn

Sylvie Bourgeois

Jean Disdier

Christine Nguyen Dinh An

Fran&ccedil;oise Delpech

Pierre Mondjian

Fabien Chevalier

Valérie Chauve

Kay Rökman

Pierrick Girard

Laurence Vrevin

Volker Krallman

Filtering medium based on activated carbon which is characterized in that it comprises three superposed layers, respectively an inner layer and two outer layers, the inner layer consisting of 80 to 95% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, the first outer layer comprising from 45 to 95% by dry weight of organic and/or inorganic chemical fibres, the balance for 100% consisting of activated carbon and/or of a material having a density of less than 0.9, the second outer layer comprising from 5 to 25% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, and in that the weight of the inner layer is between 40 and 200 g/m2 and the weight of the outer layers is between 10 and 100 g/m2.

Filtering medium and use of the said filtering medium for pollution removal from lagoons

The invention concerns a filtering medium based on a photocatalytic agent and activated carbon, characterized in that it comprises a permeable support covered with a first layer based on activated carbon, then a separate second layer based on a photocatalytic agent, or vice versa. The invention also concerns a method for making such a filtering medium.

Filtering medium, method for making same

A photocatalytic composition includes at least a photocatalyst agent and at least an inorganic binding agent, characterized in that the inorganic binding agent includes an aqueous colloidal silica dioxide (SiO) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.

Photocatalytic composition

Accelerated degradation of mulching paper, formed from cellulose fibers impregnated with a hydrophobic resin to provide weather resistance, comprises spraying the paper with an enzyme solution which degrades both the resin and the cellulose.

Accelerated mulching paper degradation process and mulching paper for implementing the process

Method for purifying gaseous effluents by means of photocatalysis, installation for carrying out said method

The subject-matter of the present invention is a filter paper for laden liquids, with a high adsorption and absorption capacity. This paper, based on cellulose fibers, is filled with organic and/or inorganic pulverulent matter. The powder filling is adapted in quantity and quality to the liquid to be filtered. It finds its application in petrochemical, agri-foodstuffs and papermaking industries.

Filter paper for laden liquids

The subject matter of the present invention is a device for purifying lightly laden water containing particles and/or fatty matter and/or microorganisms in suspension. The device of the invention is a filter comprising a grid (1) on which is placed a filter element (3) consisting of at least one sheet based on fibers and filled with organic and/or inorganic powders. The invention finds its application in all the industries which consume water and especially the crude oil processing industries and the chemical, papermaking and agri-foodstuffs industries.

Device for purifying lightly laden water

The present invention relates to a filled paper for gas filtration, with a high adsorption and absorption capacity. This paper, consisting of cellulose fibers, is filled with organic and/or inorganic powders adapted in quantity and in quality to the gas to be treated. It finds its application in the petroleum, chemical, agri-foodstuffs and papermaking industries, in apartment buildings and in office and hospital buildings.

Filled paper for gas filtration

Growing community of inventors

Vienne, France

Joseph Dussaud