Equipment and methods for recovering silver from a silver-containing solution. The equipment comprises a plastic container and spaced connectors comprising an influent liquid passage and an effluent liquid passage. The connectors penetrate a lid which is sealed about the opening of the container in press-fit relation, with a sealant compound being disposed between the lid and container adjacent the press-fit. Elastomeric grommets, carried in apertures on the lid, create a seal and slip-fit with ...

Equipment and methods for recovering silver from a silver-containing solution. The equipment comprises a container and a connector having an influent liquid passage and an effluent liquid passage. A recovery element made of a metal above silver in the electromotive force series fits within the container to form a metallic replacement cell. The metal forming the element is arranged in a woven matrix, such as, for example, galvanized window screen, which is wound around its axis which is common wi...

A relatively solid, stable biomass reaction product is provided produced from microorganisms having metal uptake properties when contacted by an aqueous solution containing metal cations. The biomass reaction product is produced by treating cells thereof with a caustic solution, whereby the biomass reaction product after drying is characterized in the particulate state of having substantially enhanced uptake of metal cations from aqueous solutions as compared to the metal uptake property of the ...

Sulfur is continuously extracted from sulfur bearing ore, found or brought to the surface, by conveying said ore through a conduit containing a downstream sulfur extraction section. After sulfur is extracted, the residual trailings are further conveyed upstream through a second conduit to an exit point.

Lanthanide components are recovered from a fluorine-containing material by a method which comprises mixing the material with silica and sulfuric acid, heating the mixture to induce a reaction and volatilize fluorine compounds, and dissolving lanthanides from the reacted mixture with an aqueous medium. The silica is an acid-insoluble form, such as sand or diatomaceous earth. Heating should be to temperatures at least about 150.degree. C. The method is particularly useful for recovering cerium fro...

Hydrogen chloride evolution is reduced in the distillation of chloroform from its admixture with an amide solvent when in contact with stainless steel, by incorporation of certain tertiary aliphatic amines.

Hydrogen is recovered from a normally liquid hydrocarbon fraction produced by the catalytic hydroprocessing of a petroleum crude oil feedstock utilizing a hot separator liquid stripping zone and high pressure superheated steam as the stripping medium.

Sulfur is continuously extracted from sulfur-bearing ore, found or brought to the surface, by injecting said ore through a tubular conduit containing a downstream sulfur extraction section. After sulfur is extracted, the residual trailings are further coursed upstream through a second tubular conduit to an exit point.

Recovery of cerium values from fluoride-containing ores such as bastnasite is enhanced. The ore is ground, roasted, and leached with dilute hydrochloric acid to produce an ore concentrate. The concentrate is treated with a solution of hydrochloric acid and boric acid to solubilize cerium values and convert fluoride to tetrafluoroborate ion. Tetrafluoroborate is removed from the solution, e.g., by precipitation, and the solution is further processed for recovery of cerium values. Removal of tetra...

This invention relates to a tool for recovering a downhole equipment stuck in the formation. The tool provides for the use of a power source mounted a distance above the equipment to be recovered. An elongated shaft is rotationally connected to the power source, the shaft having unbalanced weight which is distributed over at least a part of its length. When the power source transmits torque to the shaft, the shaft begins to vibrate, transmitting the vibration to the downhole equipment which caus...