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7314500 |
Systems and methods for removing contaminate material from a flowable material
A method of removing contaminate material from a flowable material, comprising the following steps. A first container defining a first chamber is provided. A second container defining a second...
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6780221 |
Waste metal removal systems and methods
A removal system for removing a waste metal from a waste solution. The removal system comprises outer and inner containers, inlet, intermediate, and outlet conduits, and first and second reaction...
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6572677 |
Gelatin encapsulated metal powder for silver recovery from processing solutions
The present invention relates to the use of fine metal particles for the recovery of silver from a silver-bearing photographic waste solution. In particular, the metal particles are encapsulated in...
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6290749 |
Preparation of ultra-pure silver metal
A method for preparing ultra-pure silver from a crude silver mixture containing metallic and/or non-metallic impurities, said method comprising; dissolving the crude silver mixture in nitric...
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6290747 |
Conversion of impure silver halide to ultra-pure silver metal
A method for preparing ultra-pure silver from a crude silver halide matrix containing metallic and/or non-metallic impurities, said method comprising; roasting the crude silver halide matrix to...
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6179898 |
Aluminosilicate organic-inorganic polymer
An organic-inorganic polymer comprising aluminosilicate having grafted thereon an organic radical having a --SH or --S(--CH 2 ) n --S-- group wherein n is from 0 to 4.
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5993668 |
Method for removing metal ions and/or complexes containing metal ions from a solution
Metal ions and/or complexes of metal ions are removed from a solution by formation of an insoluble chelated complex of the metal ions and a polymeric precipitating agent. A two-step process of...
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5961939 |
Process for recovery of silver from hardening photoprocessing solutions
There is provided a method for removing silver from photoprocessing solutions containing hardening agents which comprises: a) adding a chelating agent to the photoprocessing solution in an...
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5900041 |
Value metal recovery
Value metal, for example, silver in a spent silver bearing photographic solution is efficiently recovered in an exchange mass comprising a particulate inert substrate, for example, cellulosic...
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5759410 |
Process for recovering mercapto-s-triazines from silver precipitate
There is provided a process for converting a silver-mercapto-s-triazine precipitate to a solid containing silver and a solution containing mercapto-s-triazine by contacting the...
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5695645 |
Methods for removing silver from spent photoprocessing solution
Spent solutions from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source...
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5605632 |
Silver recovery device and process
A silver recovery device (30) is described for removing silver from a silver-containing solution. The device (30) comprises an ion-exchange resin bed (34) and a pump (62) for directing the solution...
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5580905 |
Process for recycling polyesters
A process for recycling polyester contained in waste materials is provided. The polyester is converted into a corresponding acid salt of a polybasic organic acid and a polyol. The process steps...
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5474593 |
Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution
An agent for treating metal ions in an aqueous solution, comprising a solid porous carrier and, supported thereon, an organic reagent (hereinafter referred to as a "redox reagent") which is capable...
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5464727 |
Cleaning of emulsion manufacturing apparatus
The present invention is a method for cleaning and preparing photographic manufacturing equipment surfaces. An aqueous solution of potassium iodide and ferric ethylenediamine tetraacetate is...
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5458024 |
Apparatus and method for recovery of silver
An improved apparatus and method for recovering metallic silver from solutions containing silver ions by reducing silver ions and oxidizing an element in the electromotive series above silver, such...
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5372631 |
Reduction of silver halides in photoemulsion using sodium borohydride and reducing sugars
Photoemulsion is reduced with a combination of reducing sugar and sodium borohydride, resulting in increased silver recovery.
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5310629 |
Silver recovery element and method
A silver recovery element (10) for treating a photographic developer solution containing silver ions comprises a substrate (20) having thereon a hydrophilic colloid layer containing physical...
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5298170 |
Effluent neutralization process and chamber
An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. The fixer inlet discharging into a vertically oriented conduit located...
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5286463 |
Composition for recovering metals and process for using same
A novel composition for use in reducing and recovering metals, such as silver, and for use in stripping adhesive polymer layers from various polymer bases, such as polyester, and processes for...
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5229009 |
Effluent precipitation and neutralization chamber
An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. A baffle and long folded ribbons inside the chamber promote mixing of the...
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5210009 |
Silver recovery element and process
An element and a process for recovering silver from a photographic developer solution containing silver ions. The silver recovery element (10) comprises a support (12) having a hydrophilic colloid...
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5188662 |
Silver recovery process
A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon...
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5137700 |
Processes employing iodine-iodide etching solutions
Aqueous iodine-iodide etching solutions are employed in the recovery of precious metals. Elemental iodine is precipitated from spent etching solutions and used to supply both the iodine and iodide...
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5128002 |
Method for processing residual baths from the photographic and photochemical industries
A method for processing residual liquids comprising organic complexes of heavy metals, sulphur and nitrogen compounds and amongst others originating from fixing baths and the like of the...
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5118344 |
Recovery of silver
In a method of recovering silver from an aqueous suspension, the suspension is admixed with a solution capable of converting silver halide to metallic silver to cause flocculation of the silver,...
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5112390 |
Replaceable core silver recovery equipment and method of making and using
Equipment and methods for an efficient, low cost silver recovery apparatus for recovering silver from a silver-containing solution. The apparatus comprises a replaceable silver recovery...
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5085836 |
Process for desilvering silver halide processing fluids
A method to reduce dissolved silver present in spent, waste, photographic processing fluids containing thiosulfate, is described. This process involves adjusting the pH to a low level prior to the...
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5078978 |
Pyridine-containing alkoxysilanes bonded to inorganic supports and processes of using the same for removing and concentrating desired ions from solutions
A method is disclosed for the quantitative removal and concentration of desired transition metal ions from a source solution which may contain larger concentrations of other metal and H + ions....
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5071476 |
Recovery silver from photo sensitive materials
A system for recovering silver from photographic film comprises a wash mixer adapted to hold the film and wash water comprising water, a proteolytic enzyme and a floculant. The mixer is adapted to...
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5064466 |
Non-toxic process for recovery of photographic silver
A non-toxic process for the recovery of silver from silver containing photographic emulsion coated paper or film substrates is provided. The process includes the use of a stripping formulation...
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5026029 |
Silver controller
A silver controller comprising a container, a core member fitted within the container, a filler material around the core member, and a fluid deflector extending around the filler material. The...
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5004212 |
Apparatus with improved flow-through characteristics for the recovery of silver from silver-containing waste fluids
An improved canister for the recovery of silver from acidic, waste fluids is described. This canister comprises both inner and outer element, each removable from the other, with fitted top and...
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4997166 |
Silver recovery system
A sealed, pressurized system for processing silver bearing solutions, such as photographic solutions, for the purpose of removing the silver comprises a series of interconnected sealed containers...
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4868120 |
Method of recovering both silver and a base for sensitive materials from sensitive materials by utilizing micro-organisms
Method of recovering both silver and a base in a reusable condition from sensitive material, such as a film or a photographic printing paper, having surfaces including gelatine and fine silver...
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4854552 |
Apparatus for recovery of silver from spent, waste, acidic processing fluids
Apparatus for recovery of silver from spent, waste acidic silver halide photographic processing fluid, e.g., fixer solution, comprising passing the fluid through finely divided iron e.g., steel...
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4842644 |
Silver recovery method
Methods of and apparatus for recovering silver and other metals from solutions containing compounds of those metals. The solution being treated is pumped upwardly under pressure and at a constant...
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4828717 |
Device and method for reducing volume of aqueous waste effluents
The device for reducing the volume of an aqueous waste effluent includes a holding tank, a heating tank for receiving waste effluent from the holding tank and including a heater for heating the...
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4799954 |
Recovery of silver from photographic film with high shear and caustic
A process for the recovery of silver from exposed or unexposed photographic film using a caustic alkali solution at elevated temperatures with high shear.
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4755270 |
Method of processing solutions
A method of processing waste solutions containing metal salts or complex involves applying ultra-sonic vibrations to a container in which the solution is placed and treating the solution or the...
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4740244 |
Process for recovery of silver from spent, waste, acidic processing fluids
Process for recovery of silver from spent, waste acidic silver halide photographic processing fluid, e.g., fixer solution, comprising passing the fluid through finely divided iron, e.g., steel...
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4612057 |
Recovery of silver from photographic films by high shear conditions
A method for the recovery of silver from photographic film having a polyester base and a macromolecular organic polymer coating to which is adhered a light sensitive silver emulsion layer. The...
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4585561 |
Flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions
A flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions is described, wherein finely divided, inert gas bubbles are injected into the dispersions...
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4445935 |
Method for the recovery of silver from waste photographic fixer solutions
The method of the present invention is directed to the recovery of silver from spent photographic fixer solutions and for providing an effluent essentially silver-free that is suitable for...
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4441697 |
Silver recovery unit
An improved apparatus for recovering silver from a silver-containing solution. The device includes a container having influent and effluent passageways and a filler element composed of a metal...
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4437889 |
Method of recovering silver from solid and liquid photographic waste
Silver is recovered from photographic wastes, whether liquid (used developing solution) or a solid (used film) in a completely nonelectrolytic system using a series of physical-chemical reactions....
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4429038 |
Process for concentrating yellow silver sols
A yellow silver sol containing a binder is concentrated by flocculation in the presence of a calcium-free gelatin, a water-soluble chloride being added to the flocculation and/or after the...
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4392889 |
Method and apparatus for recovering silver and plastic from used film
A method and machine for recovering silver and polyester from exposed photographic X-ray film of the type having a polyester base coated with a sheath of polyvinyladine chloride and a...
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4331473 |
Silver removal apparatus and method
Silver is recovered from solutions such as photographic fixer solutions by contacting the solution with a metallic exchange medium. The metallic exchange medium comprises a plurality of buoyant...
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4331472 |
Metal removal apparatus and method
A first metal is removed from solutions such as polluted water by contacting the solution with a metallic exchange medium. The metallic exchange medium comprises a plurality of buoyant elements,...
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