摘要:
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 silver-mercapto-s-triazine precipitate with one or more reducing agents. In preferred embodiments, at least one of the reducing agents has a redox potential more negative than about -0.9 V vs. Normal Hydrogen Electrode, NHE.
摘要:
A process for removing silver from a silver containing photoprocessing solution, comprising the steps of:
a) mixing a mercapto-s-triazine, or a water soluble salt thereof, with the solution thereby causing formation of a mixture of i) precipitates and fines of silver mercapto-s-triazine and ii) the solution; b) mixing a copolymer flocculant with the mixture thereby causing flocculation and agglomeration of the silver TMT fines; wherein the copolymer i) consist of monomers selected from the group consisting of acryloyloxyethyl trimethylamine chloride and acrylamide and ii) has a reduced viscosity of 21 to 30 dl/g.
摘要:
A method of treating a seasoned fixing solution comprising desilvering a fixing solution containing a chelating compound represented by Formula I MOOC(CH₂) m (X) p ((CH₂) n COOM) q (I) where X is N, or C-OH; n and m are independently 0, 1, or 2; if X is N then p is 0 or 1 and q is 1 or 2; if X is C-OH then p is 0, 1 or 2 and q is 1 or 2; and M is a cationic counterion; and further containing a carryover amount of a bleaching agent which is a complex of ferric ion and a tridentate or a tetradentate ligand.
摘要:
On traite un élément photographique exposé à la lumière et développé en couleurs avec un agent décolorant et un agent de fixation. L'agent de fixation comprend un thiol aliphatique en tant qu'accélérateur. Cet accélérateur sert à la fois à stabiliser l'agent de fixation afin d'en faire une utilisation commerciale et à empêcher les virages provoqués par la dégénération du thiol qui se trouve dans le bain de fixation de décolorant. On a également prévu un dispositif permettant l'enlèvement efficace de l'argent du bain fixateur afin de rendre superflue une étape séparée d'extraction d'argent.
摘要:
Lors de l'utilisation d'un procédé qui extrait l'argent sous la forme d'un sel d'argent difficilement soluble, tel que notamment du sulfure d'argent, d'une solution contenant un autre composé d'argent, tel qu'un complexe de thiosulfate d'argent dans un fluide de rinçage ou de fixage photographique par précipitation, la solution est soumise à un rayonnement électromagnétique d'une longueur d'ondes inférieure à 375 nm. Le liquide ainsi irradié est conduit à travers un organe de filtrage (33) qui lie le sulfure d'argent à sa surface, sous la forme de sulfure d'argent cristallin. Il en résulte que le sulfure d'argent se sépare par précipitation et se dépose sur la surface de l'organe de filtrage, sous la forme de sulfure d'argent solide, qui à son tour agit comme catalyseur dans la précipitation et le dépôt ultérieur du sulfure d'argent solide sur la surface de l'organe de filtrage. Grâce à la liaison du sulfure d'argent solide sur la surface de l'organe de filtrage, la nécessité de recourir à un autre filtre éventuel est réduite.
摘要:
Disclosed is a method for treating a photographic processing waste solution comprising concentrating the photographic processing waste solution containing at least thiosulfate ions, characterized in that there is provided at least one part selected from (i) to (v) shown below: (i) a part for adding sulfite ions or a compound capable of releasing sulfite ions into the photographic processing waste solution at the time or before heating of the photographic processing waste solution; (ii) a part for contacting evaporated gas with a catalyst having a metal of the following (a) to (d) or a compound thereof carried thereon: (a) at least one selected from the group VIII elements consisting of iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium and platinum, (b) copper, (c) zinc, (d) manganese; (iii) a part for permitting a water-soluble polymer to exist; (iv) a part for permitting an oxidizing agent capable of oxidizing thiosulfate ions to exist; and (v) a part for adding a pH controlling agent into the photographic processing waste solution in order to maintain pH of the photographic processing waste solution at 3.0 to 11.0. Disclosed is a device for treating a photographic processing waste solution, which comprises a part for feeding a photographic processing waste solution containing at least thiosulfate ions, an evaporation tank for receiving the waste solution and a heating part for heating the waste solution in the evaporation tank, thereby concentrating the waste solution by evaporation, characterized in that it has at least one of the parts (i) to (v) mentioned above. According to the present invention, a method for inhibiting efficiently bad odor without bringing about cost increase and requiring cumbersome working and a device therefor can be obtained.
摘要:
Es wird ein Flotationsverfahren zur kontinuierlichen Wiedergewinnung von Silber oder Silberverbindungen aus Lösungen oder Dispersionen beschrieben, wobei in Gegenwart von Proteinen fein verteilte inerte Gasblasen in die Dispersionen von Silber und Silberverbindungen eingeblasen werden und der pH-Wert des Mediums bei dem isoelektrischen Punkt des Proteins gehalten wird. Die Zugabe eines Tensides beschleunigt das Verfahren. Das entsilberte Abwasser hat einen Silbergehalt kleiner als 1 mg Ag/l. Die Flotatmenge (12) beträgt weniger als 2% der in dem Verfahren eingesetzten Abwassermenge (5).
摘要:
This relates to a method of rendering a used photographic processing solution less corrosive to low carbon steel comprising: taking at least a used photographic processing solution containing a color developing agent and a used photographic processing solution containing a bleaching agent; delivering the used photographic processing solutions to a collection vessel to form a used photographic processing composition; and adjusting the pH of the used photographic processing composition to 6.5 to 11.
摘要:
The present invention relates to a material and a method for treating of photographic effluents in order to eliminate micro-organisms and pollutant byproducts 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.