Eastman-kodak Company

Danielle Marie Wettling

Olivier Jean Poncelet

Jeannine Rigola

Christopher P Moore

Karen Leeming

Jacques Roussilhe

Gregory N Batts

Christian G Guizard

Christian L Lurin

Olivier C Poncelet

Sylvie Lebrat

Pascale Lacan

Thierry Janet

The present invention relates to a composite material with an improved structure in which is dispersed an active organic compound, and a method for treating effluents, in particular a method for treating photographic effluents. The composite material takes the form of a structured gel comprising an aluminosilicate polymer matrix in the form of fibers in which at least two distinct fibers are interconnected by at least two covalent bonds to form an irreversible chemical gel and, dispersed in the matrix, an active organic compound. The choice of the degree of cross-linking of the matrix makes it possible to control the diffusion of a hydrophilic active organic compound. The invention further concerns a method for preparing such a composite material.

Composite material for treating photographic effluents

The invention relates to a biocidal material containing a specific mixture of a hydrophobic and a hydrophilic biocides, dispersed in a water-permeable matrix. The invention further concerns a method that uses the biocidal material of the invention to prevent microorganisms from growing in an aqueous solution in which such microorganisms are liable to grow.

Biocidal material with improved activity

The present invention relates to a material and a method for treating of photographic effluents in order to eliminate microorganisms and pollutant by-products so as to control bacterial growth and thereby obtain effluents that comply with regulatory requirements. The method for preparing an oxidizing material according to the invention comprises the dispersion in colloidal form of a metal or metal compound in an aqueous solution of an inorganic aluminosilicate polymer, said aluminosilicate being able to form an inorganic gel, and said metal or metal compound being able to cause the oxidation of oxidizable products and (or) micro-organisms to be eliminated, followed by the addition of a base to cause said aluminosilicate to gel. The metal is preferably silver in a powder form that is able to form a colloid when it is dispersed. The oxidizing material of the invention is efficient especially for the treatment of photographic baths, in particular wash baths placed after the fixing step.

Material and method for treating photographic effluents

This invention concerns the developing of silver halide photographic products. Silver-laden slurries accumulate in developing baths. It is possible to eliminate these silver-laden slurries by placing the developing baths in contact with aluminosilicate polymers modified by sulfur groups. For example, a tank is fitted with a loop to feed the bath through a cartridge 16 that contains the elements that are permeable to the developing bath, and which contain the aluminosilicate polymer modified by the sulfur groups.

Method to extract silver from a photographic developer

The present invention relates to a composite material in which an active organic compound is dispersed, as well as to an effluent treatment process, especially a photographic effluent treatment process. The composite material comprises an aluminosilicate organic-inorganic polymer matrix in fiber form comprising at least on the surface an organic radical having a &mdash;SH or &mdash;S(&mdash;CH ) &mdash;S&mdash; function with n between 0 and 4 and in which an active organic compound is dispersed.

Method for treating a photographic processing bath

Biocide material and method of preparation of said material

The present invention relates to an apparatus for putting into contact a defined quantity of treatment material with an aqueous solution to be treated. The apparatus comprises at least one medium permeable to the aqueous solution to be treated in which the treatment material is placed. The medium is made of polyester foam and has the form of a closed envelope. The treatment material present in the at least one medium is a material for trapping a compound to be eliminated from the solution.

Apparatus for putting into contact a defined quantity of a treatment material with an aqueous solution to be treated and process for treating an aqueous solution

An organic-inorganic polymer comprising aluminosilicate having grafted thereon an organic radical having a &mdash;SH or &mdash;S(&mdash;CH,),&mdash;S&mdash; group wherein n is from 0 to 4.

Aluminosilicate organic-inorganic polymer

The present invention concerns a novel photocatalytic composition, a photocatalytic element and a novel method for the photocatalytic treatment of effluents, comprising a gaseous or aqueous solution of the organic compounds to be destroyed. This novel photocatalytic composition consists of an inorganic gel comprising a photocatalyst and an aluminosilicate inorganic polymer binder of the Imogolite type. This composition destroys organic compounds efficaciously.

Inorganic transparent photocatalytic composition

The invention concerns a method for decontaminating a used photographic processing bath. This method consists of putting the processing bath in contact with a heat-reversible hydrophilic polymer which becomes hydrophobic above a temperature lower than the temperature of the processing bath. The tars and other organic contaminants present in the used photographic processing bath can be removed by cooling the heat-reversible polymer below the temperature where it becomes hydrophilic.

Method of decontaminating a photographic bath with heat-reversible

The present invention concerns a process for treating photographic baths containing organic contaminants and a device for implementing this method. The process for treating a photographic bath containing contaminants comprises the step of putting the photographic bath in contact with a photographically inert material, resistant to a high pH and having a lipophilic surface. This method affords an improvement in the processing of photographic products.

Process for treating a photographic bath containing organic contaminants

A biocidal material comprises a biocide immobilized in a porous inorganic polymer network such as a sol-gel matrix. The polymer may be coated on an inorganic support. The material can be used for inhibiting microbial growth in an aqueous medium, e.g., the wash solution of a photoprocessing system. The material can be housed in a flow-through container.

Material method and apparatus for inhibiting microbial growth in an

The invention concerns a composite gel comprising an inorganic matrix containing a fibrous inorganic polymer in which an active organic compound is dispersed. The invention also concerns a device comprising the gel and a process for delivering a controlled quantity of active organic compound in an aqueous solution. The invention applies to the prevention of biological growth in aqueous solutions used domestically, agriculturally or industrially, in particular in the solutions used in photographic processing. FIGURE of the drawing to be published with the Abstract: None

Organic/inorganic gels for delivering controlled quantities of active

The invention concerns a composite gel comprising an inorganic matrix containing a fibrous inorganic polymer in which an active organic compound is dispersed. The invention also concerns a device comprising the gel and a process for delivering a controlled quantity of active organic compound in an aqueous solution. The invention applies to the prevention of biological growth in aqueous solutions used domestically, agriculturally or industrially, in particular in the solutions used in photographic processing.

The invention relates to membranes for facilitated ion transport in aqueous solutions. The membrane is an adduct of a heteropolysiloxane and a crown-ether, and contains certain ions such as picrate or fluoroborate. This membrane is efficient for the selective transport of potassium ions.

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Chatenoy le Royal, France

Danielle Marie Wettling