The recovery of gold and/or silver from gold and/or silver containing material is generally described. The gold and/or silver can be recovered selectively, in some cases, such that gold and/or silver are at least partially separated from non-silver and/or non-gold material. Gold and/or silver may be recovered from material using mixtures of acids, in some instances. In some cases, the mixture can comprise nitric acid and at least one supplemental acid, such as sulfuric acid or phosphoric acid. The amount of nitric acid within the mixture can be, in some instances, relatively small compared to the amount of sulfuric acid or phosphoric acid within the mixture. In some cases, the recovery of gold and/or silver using the acid mixtures can be enhanced by transporting an electric current between an electrode and the gold and/or silver of the material. In some cases, acid mixtures can be used to recover silver from particular types of materials, such as material comprising silver metal and cadmium oxide and/or material comprising silver metal and tungsten metal.

The recovery of gold and/or silver from gold and/or silver containing material is generally described. The gold and/or silver can be recovered selectively, in some cases, such that gold and/or silver are at least partially separated from non-silver and/or non-gold material. Gold and/or silver may be recovered from material using mixtures of acids, in some instances. In some cases, the mixture can comprise nitric acid and at least one supplemental acid, such as sulfuric acid or phosphoric acid. The amount of nitric acid within the mixture can be, in some instances, relatively small compared to the amount of sulfuric acid or phosphoric acid within the mixture. In some cases, the recovery of gold and/or silver using the acid mixtures can be enhanced by transporting an electric current between an electrode and the gold and/or silver of the material. In some cases, acid mixtures can be used to recover silver from particular types of materials, such as material comprising silver metal and cadmium oxide and/or material comprising silver metal and tungsten metal.

A method is used to prepare silver nanoparticles in the form of a silver nanoparticle cellulosic polymeric composite. A cellulosic polymer, organic solvent having a boiling point at atmospheric pressure of 100 C. to 500 C. and a Hansen parameter (.sub.T.sup.Polymer) equal to or greater than that of the cellulosic polymer, and a nitrogenous base are mixed to form a premix solution. Upon heating the premix solution to a temperature of at least 75 C., a solution of reducible silver ions is added that is equimolar or less in relation to the nitrogenous base. The weight ratio of reducible silver ions to the cellulosic polymer is 5:1 to 50:1. The resulting silver nanoparticle composite is cooled, isolated, and re-dispersed in an organic solvent, providing a non-aqueous silver-containing dispersion comprising the silver nanoparticle cellulosic polymeric composite.

An electrode material (1) includes: a porous support (2); and silver chloride (4) supported on the porous support (2). The porous support (2) is, for example, silica. The silica may be: wet-process silica such as precipitated silica or gelation method silica; dry-process silica; or the like.

An electrode material (1) includes: a porous support (2); and silver chloride (4) supported on the porous support (2). The porous support (2) is, for example, silica. The silica may be: wet-process silica such as precipitated silica or gelation method silica; dry-process silica; or the like.

The present disclosure provides plated particles for use in silver/silver chloride ink for making medical devices. The plated particles include a plurality of silver coated inert particles. The silver coating of each silver coated inert particle is about 10 to 50% by weight of the silver coated inert particle. The silver/silver chloride ink includes a plurality of silver coated inert particles and a plurality of silver chloride particles. A medical device includes a backing layer, a silver/silver chloride ink layer and a conductive adhesive layer.

The invention is related to the chemical products industry on the one hand and on the other hand to the service industry for the management of places where it is desired that there be certain precipitation of water in the form of rain. The invention optimizes the number of nuclei for the formation of water or ice droplets in the clouds where they are applied, also allowing faster and less costly cloud seeding, requiring less volume of seeding dispersion to be handled. The silver iodide dispersion has an ionic solution for cloud seeding, characterized in that the continuous phase, that is, the solvent of the dispersion, is a mixture of at least 1) toluene, with 2) p-xylene. ,3) o-xylene, 4) 2-butoxyethanol and 5) methylcyclohexane.

The invention is related to the chemical products industry on the one hand and on the other hand to the service industry for the management of places where it is desired that there be certain precipitation of water in the form of rain. The invention optimizes the number of nuclei for the formation of water or ice droplets in the clouds where they are applied, also allowing faster and less costly cloud seeding, requiring less volume of seeding dispersion to be handled. The silver iodide dispersion has an ionic solution for cloud seeding, characterized in that the continuous phase, that is, the solvent of the dispersion, is a mixture of at least 1) toluene, with 2) p-xylene. ,3) o-xylene, 4) 2-butoxyethanol and 5) methylcyclohexane.

A method is used to prepare silver nanoparticles in the form of a silver nanoparticle cellulosic polymeric composite. A cellulosic polymer, organic solvent having a boiling point at atmospheric pressure of 100 C. to 500 C. and a Hansen parameter (.sub.T.sup.Polymer) equal to or greater than that of the cellulosic polymer, and a nitrogenous base are mixed to form a premix solution. Upon heating the premix solution to a temperature of at least 75 C., a solution of reducible silver ions is added that is equimolar or less in relation to the nitrogenous base. The weight ratio of reducible silver ions to the cellulosic polymer is 5:1 to 50:1. The resulting silver nanoparticle composite is cooled, isolated, and re-dispersed in an organic solvent, providing a non-aqueous silver-containing dispersion comprising the silver nanoparticle cellulosic polymeric composite.

A method, printed circuit board assembly (PCBA), and device comprising a PCBA are disclosed. The method includes obtaining a material comprising silver halide grains, incorporating the material into a PCBA having at least one component in contact with the material, detecting a variation in electrical properties of the at least one component that is above a threshold variation and, in response, enacting a data protection response. The PCBA includes a material comprising silver halide grains, at least one component in contact with the material, and a monitoring component. The monitoring component is configured to detect a variation in electrical properties of the at least one component that is above a threshold variation and, in response, enact a data protection response.