Disclosed is a process for producing manganese fluoride, comprising a step (1) of allowing a manganese compound such as MnF.sub.2 having been dried at a temperature of not lower than 100.degree. C. to react with a fluorinating agent such as F.sub.2 at a temperature of 50 to 250.degree. C. and a step (2) of further allowing a product obtained in the step (1) to react with a fluorinating agent at a temperature of 250 to 450.degree. C. According to this process, manganese fluoride capable of genera...

A zinc or manganese salt in the form of essentially plate-like particles is subjected to a sulphiding or, in the case of a zinc salt, an oxiding treatment, giving multi-layer structures where the treatment is partial or a single layer structure where the treatment is substantially complete. This treatment has the effect of increasing the refractive index of the particles without altering the plate-like shape of the particles. The treated particles are thus suitable for use as nacreous pigments.

There is described in the specification a mercury-free manganese primary dry battery wherein the cathode mixture contains boric acid or an alkali borate at a ratio of 0.04 to 0.4 parts by weight per 100 parts by weight of manganese dioxide as a boron conversion value or wherein the separator contains boric acid or an alkali borate at a ratio of 0.1 to 8.0 parts by weight per 100 parts by weight of a dry solid content in the pasting agent. Such battery has excellent discharge properties under lig...

A foraminous filter useful for removing particulates from a gas being flowed therethrough having impregnated therein a manganese dioxide absorbent active for removal of Total Reduced Sulfur compounds from the gas.

Briefly stated, the present invention comprises a composition of matter having the formula: wherein M is an alkali earth metal selected from magnesium, calcium, strontium, barium or mixtures thereof, R is hydrogen or a hydrocarbyl group, and L is a ligand having the formula: ##STR1## The present invention also encompasses methods for preparing these novel compounds.

A solution suitable for application to plants and soil to correct manganese deficiencies is described which comprises an aqueous solution of manganese sulfate and mono-potassium or mono-ammonium hydrogen orthophosphate having an acidic pH value from about 1.5 to about 4 and a novel eutectic composition.

Pellets of manganese ore and having a porosity of not less than 45 percent are disclosed. In a preferred form the major portion of the manganese content is present as manganous oxide. The balls are produced by forming a finely divided mixture of manganese ore, a carbonaceous fuel such as coke, and an addition agent which will form gaseous products on heating, and heating the balls at a temperature and for a time sufficient to partially reduce the manganese ore and obtain the required porosity. T...

A method of producing manganese dioxide comprising the steps of pouring an aqueous solution of a soluble manganese salt and an aqueous solution of alkali carbonate into a reaction vessel and mixing the two solutions so that the two solutions may react with each other to produce manganese carbonate, heating the manganese carbonate produced in an atmosphere containing water vapor to produce crude manganese dioxide, and washing the crude manganese dioxide produced with dilute or concentrated nitric...

A manganese-zinc ferrite core having an essentially linear relation between permeability and temperature over the temperature zone ranging from about -40.degree. C. to about +60.degree. C. and being composed of starting material of about 50 to 55 mol percent of Fe.sub.2 O.sub.3, about 23 to 35 mol percent of MnO, about 10 to 25 mol percent of ZnO, up to 3 mol percent of TiO.sub.2, about 0.02 to 0.2 percent by weight of CaO and about 0.05 to 1 percent by weight NiO.

The precipitate species of manganese in the presence of an oxidative condition in the waters of an aqueous system can be diminished by treating such waters with certain amide-containing polymer.