Particulate MnO.sub.2, having simultaneously a micropore surface area greater than 8.0 m.sup.2 /g, desirably between about 8.0 and 13 m.sup.2 /g and BET surface area of between about 20 and 31 m.sup.2 /g within the context of an MnO.sub.2 having a total intraparticle porosity of between about 0.035 cm.sup.3 /g and 0.06 cm.sup.3 /g produces enhanced performance when employed as cathode active material in an electrochemical cell, particularly an alkaline cell. The average pore radius of the meso a...

A catalyst for the oxidation of volatile organic compounds and carbon monoxide comprising manganese and alumina, such catalyst having been impregnated with a phosphorus compound. The presence of the phosphorus compound results in a significant oxidative conversion of both the volatile organic compounds and the carbon monoxide. The catalyst is especially useful for treating gaseous streams that emanate from industrial sources, such as wood pulp manufacturing plants. The manganese portion of the c...

Particulate MnO.sub.2, having simultaneously a micropore surface area greater than 8.0 m.sup.2 /g, desirably between about 8.0 and 13 m.sup.2 /g and BET surface area of between about 20 and 31 m.sup.2 /g within the context of an MnO.sub.2 having a total intraparticle porosity of between about 0.035 cm.sup.3 /g and 0.06 cm.sup.3 /g produces enhanced performance when employed as cathode active material in an electrochemical cell, particularly an alkaline cell. The average pore radius of the meso a...

A catalyst for the oxidation of volatile organic compounds and carbon monoxide comprising manganese and alumina, such catalyst having been impregnated with a phosphorus compound. The presence of the phosphorus compound results in a significant oxidative conversion of both the volatile organic compounds and the carbon monoxide. The catalyst is especially useful for treating gaseous streams that emanate from industrial sources, such as wood pulp manufacturing plants. The manganese portion of the c...

Compounds and methods of preparing compounds represented by structural formula (I): ##STR1## wherein X represents any suitable counter-anion; R.sup.1 and R.sup.2 independently represent hydrogen, C.sub.1-6 alkoxy or nitro; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each independently represents hydrogen, hydroxy, halo, C.sub.1-6 alkyl, C.sub.2-6 alkenyl or C.sub.1-6 alkoxy; and R.sup.7, R.sup.8, R.sup.9 and R.sup.10 each independently represents hydrogen, hydroxy, halo, C.sub.1-6 alkyl, C.sub.2-6 alk...

An electro-deposition process for simultaneously producing manganese metal and manganese dioxide. Manganese metal and manganese dioxide are simultaneously electro-deposited in an electrolytic cell without the use of membranes separating the anode and cathode compartments. This is accomplished using a manganese chloride electrolyte in a temperature range of about 70 to 90 degrees C., with the free hydrochloride acid being removed from the electrolyte to a level below about 0.1M. The acid removal ...

The invention relates to systems and processes for treating particulate oxides of manganese useful as oxidizing sorbents for capturing or removing target pollutants from industrial gas streams, including, but not limited to, nitrogen oxides (NO.sub.x), sulfur oxide (SO.sub.x), mercury (Hg), hydrogen sulfide (H.sub.2S), other totally reduced sulfides (TRS), and oxides of carbon (CO and CO.sub.2) gases. Oxides of manganese are washed an aqueous oxidizing solution, which may be adjusted as necessar...

The present invention provides methods for making manganese sulfide without the need for recycling a significant amount of manganese sulfide back to the reaction chamber. The methods are performed by admixing substantially pure manganese, substantially pure sulfur, and iron pyrite. The manganese and sulfur are then reacted to form manganese sulfide. Iron pyrite regulates the reaction and enables the use of conventional equipment in the methods of the present invention. After the reaction ends, t...

A new crystalline maganese phosphate composition having an empirical formula: The compound was determined to crystallize in the trigonal space group P-3c1 with a=8.8706(4) .ANG., c=26.1580(2) .ANG., and V (volume)=1783 .ANG..sup.3. The structure consists of sheets of corner sharing Mn(II)O.sub.4 and PO.sub.4 tetrahedra with layers of (H.sub.3 NCH.sub.2 CH.sub.2).sub.3 N and water molecules in-between. The pronated (H.sub.3 NCH.sub.2 CH.sub.2).sub.3 N molecules provide charge balancing for the in...

An active manganese dioxide electrode material that exhibits improved electrochemical performances compared with conventional manganese dioxide materials includes at least one dopant. The doped manganese dioxide electrode materials may be produced by a wet chemical method (CMD) or may be prepared electrolytically (EMD) using a solution containing manganese sulfate, sulfuric acid, and a dopant, wherein the dopant is present in an amount of at least about 25 ppm.