Abstract: The present invention provides a method for the production of spherically-shaped zinc powders using an atomization process. The method involves an alloying addition of lithium to the molten zinc prior to atomization. The invention also provides for spherically-shaped zinc-lithium, zinc-lithium-lead, and zinc-lithium-lead-indium alloy powders which are produced using the method of the invention.

Abstract: A titanium dioxide pigment is provided for use in polymeric compositions comprising a pyrogenic titanium dioxide pigment which has been treated with an addition system comprising:(a) an organophosphate/alkanolamine addition product, and(b) a polyol.This invention provides for a novel method for treating a pyrogenic titanium dioxide pigment in order to reduce yellowing when such pigment is incorporated into a polymeric composition comprising adding to such pigment an addition system which comprises:(a) an organophosphate/alkanolamine addition product, and(b) a polyol.

Abstract: A treatment for reducing the dusting of a particulate zinc oxide which has been treated with an organic compound, such as propionic acid, for incorporation in rubbers and plastics, comprising treating said particulate zinc oxide which a composition selected from the group comprising trialkyl phosphates, tricresyl phosphate and mixtures thereof in an amount sufficient to reduce the dusting index thereof.

Abstract: A method is provided for recovering zinc from non-sulfide containing zinc ore comprising the steps of grinding the ore to a pre-determined level; selectively flocculating the ground ore using a dispersing agent and a flocculating agent and froth flotating the flocs using an ester of a mercaptocarboxylic acid as a collector in the presence of a soluble sulfide.

Abstract: A weather-resistant TiO.sub.2 pigment having improved optical properties is provided. The pigment is substantially encapsulated with a coating of an amorphous, dense silica in an amount between about 1% and about 7%; a coating of a voluminous silica in an amount between about 1% and about 8%; and preferably a coating of a precipitated alumina in an amount between about 2% and about 8%. In a particularly preferred embodiment the pigment further includes an innermost coating of a precipitated alumina in an amount between about 0.2 and 0.6%, the percentages of silica and alumina being calculated as % SiO.sub.2 and Al.sub.2 O.sub.3 by weight, based on the final treated TiO.sub.2 pigment. A process for manufacturing the pigment is further provided.

Abstract: The properties of brass powder compacts are improved by including selected amounts of cobalt in the brass powder compositions; specifically brass powder compacts broadly comprising about 5% to about 45% zinc, about 1% to about 7% cobalt, balance essentially copper, are disclosed.

Abstract: A desulfurization process is provided using particulate zinc oxide shapes of high surface area and improved crushing strength prepared without extraneous binder by a process including forming normal surface area zinc oxide into shapes without binder, converting at least a portion of the zinc oxide to basic zinc carbonate by exposing the shapes in the presence of moisture, to a carbon dioxide-containing atmosphere and effecting substantially complete decomposition of the basic zinc carbonate. Conditions of bulk density, moisture content and temperature are controlled.

Abstract: Particulate zinc oxide shaped of high surface area and improved crushing strength are prepared without extraneous binder by a process including forming normal surface area zinc oxide into shapes without binder, converting at least a portion of the zinc oxide to basic zinc carbonate by exposing the shapes in the presence of moisture, to a carbon dioxide-containing atmosphere and effecting substantially complete decomposition of the basic zinc carbonate. Conditions of bulk density, moisture content and temperature are controlled.