Abstract:
A resin for sorption of tungsten is prepared by copolymerization of 8-hydroxyquinoline, a polyamine, resorcinol and formaldehyde. The resin finds particular utility for recovery of tungsten from alkaline brines.
Abstract:
A method of manufacturing amphoteric resins. Polymeric beads are treated sequentially with two reagents of opposite acid/base character. The resins are useful in the desalination of water.
Abstract:
An ATR case containing electrical equipment has a flat rectangular ventilator unit clamped and bonded in face-to-face relationship to the underside of the casing for communicating air to the casing-interior from a duct open to the ambient atmosphere at one end of the unit. The communicated air is ducted through a mixed-bed filter in the ventilator unit that converts any airborne salt to water. This water and any air-borne moisture is removed by desiccant material before the salt-filtered air is ducted through outlet vents in the upper wall of the ventilator unit, into the casing interior. The desiccant is contained within a cavity that opens into the outlet ducting but is located beyond the vents for the desalinating filter.