Abstract: 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.
Type:
Grant
Filed:
February 12, 2003
Date of Patent:
October 9, 2007
Assignee:
Ahlstrom Research and Services
Inventors:
Joseph Dussaud, Leonie Bouvier, Fabien Chevalier
Abstract: Methods for forming substrates having a powder are provided. The powder may be applied to the substrate by means of a rotating drum and a cooperating blade that dispenses the powder on to the substrate. The method may be used to dispense compositions for protecting plants, including, for example, fruits, vegetables, plants, and flowers, against decay. The method may include the application of an adhesive to the substrate into which the powder applied. The powder may be a mixture that includes at least one substance capable of adsorbing ethylene released by the plant, and at least one substance, an oxidizing agent, capable of degrading ethylene. The powder mixture may be in the form of individualized grains embedded in the adhesive layer. Part of the grain surface remains outside of the adhesive layer, for example, to thereby make the powder grains active in the degradation of ethylene.
Abstract: 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 (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.
Type:
Grant
Filed:
March 31, 1999
Date of Patent:
June 14, 2005
Assignee:
Ahlstrom Research and Services
Inventors:
Pascale Escaffre, Pierre Girard, Joseph Dussaud, Léonie Bouvier
Abstract: 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 (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.
Type:
Grant
Filed:
May 3, 2004
Date of Patent:
April 12, 2005
Assignee:
Ahlstrom Research and Services
Inventors:
Pascale Escaffre, Pierre Girard, Joseph Dussaud, Léonie Bouvier
Abstract: 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.
Abstract: 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 (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.
Type:
Application
Filed:
May 3, 2004
Publication date:
October 14, 2004
Applicant:
Ahlstrom Research and Services
Inventors:
Pascale Escaffre, Pierre Girard, Joseph Dussaud, Leonie Bouvier
Abstract: 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.
Type:
Application
Filed:
February 12, 2003
Publication date:
August 14, 2003
Applicant:
AHLSTROM RESEARCH AND SERVICES
Inventors:
Joseph Dussaud, Leonie Bouvier, Fabien Chevalier