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7338647 |
Synthesis of cathode active materials
The present invention relates to a method for preparing an electroactive metal polyanion or a mixed metal polyanion comprising forming a slurry comprising a polymeric material, a solvent, a...
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7309478 |
Production of tetrabasic lead sulfate from solid state reactions for the preparation of active plates to be used in lead-acid batteries
A solid state reaction method for the production of tetrabasic lead sulfate includes the steps of mixing a stoichiometric mixture of 3PbO.PbSO4.H2O and PbO and heating the stoichiometric mixture of...
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7118830 |
Battery paste additive and method for producing battery plates
A battery paste additive, and process for making the same comprising micronized seed crystals of tetra basic lead sulfate, is added to battery paste and results in accelerated curing time and other...
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7091250 |
Additive for producing a positive active material for lead-acid storage batteries, a method for its production and a method for its use
The present invention is an additive for producing a positive active material for lead-acid storage batteries on the basis of finely divided tetrabasic lead sulfate. The additive contains a...
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7011805 |
Production of tetrabasic lead sulfate from solid state reactions for the preparation of active plates to be used in lead-acid batteries
The production of tetrabasic lead sulfate by means of solid state reactions at high temperatures allow the formation of powders having a particle size of less than 10 μm. In the methods the...
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6858562 |
Catalyst for decomposing organic harmful substances and method for decomposing organic halides by use thereof
A catalyst of a water insoluble vanadyl sulfate or a complex catalyst, in which a specific oxide and a specific sulfate are combined to the water insoluble vanadyl sulfate are excellent not only in...
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6478971 |
Process for removing sulfate from an aqueous salt solution
A simple, effective, cost-efficient method of precipitating sulfate in an aqueous salt solution and removing the precipitate from the solution. The steps of the method include diluting the solution...
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5460730 |
Process and apparatus for treating wastewater from lead battery production
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate...
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5314766 |
Lead-acid battery electrode and method of manufacture
Positive plates are prepared by forming partially oxidized tetrabasic lead sulfate (4 PbO n . PbSO 4 ) having at least a part of the oxide (PbO n ) portion in the form of alpha lead dioxide...
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5252105 |
Method of forming lead-acid battery electrode
In a preferred method, an electrode for a lead-acid battery is prepared in a new continuous process without the conventional curing step. The general procedure for preparing electrodes includes...
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4927510 |
Hydrometallurgical process for recovering in pure metal form all the lead contained in the active mass of exhausted batteries
A process for recovering in pure metal form substantially all lead from battery sludge is disclosed. The battery sludge is desulfurized, leached with acid, and separated by filtration. Lead is...
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4673561 |
Process for the manufacture of hydrated oxides and tri- and tetra- basic lead sulphates
Process for the manufacture of hydrated lead oxides in the bivalent state characterized by the step of (1) reacting metallic lead with acetic acid (e.g. ammonium acetate, 5%-30% solution) at a...
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4337235 |
Purification of thionyl chloride
A process for the purification of crude thionyl chloride wherein the crude thionyl chloride is distilled in the presence of sulfur and a sulfur-aluminum chloride catalyst to convert the impurities,...
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4329182 |
Granular stabilizer for chlorine-containing polymers
Disclosed is a granular stabilizer for chlorine-containing polymers, which comprises porous spherical particles composed of randomly integrated needle crystals of a polybasic sulfuric acid/fatty...
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4324768 |
Process for preparation of lead compounds
Disclosed is a process for the preparation of lead compounds which comprises reacting lead monoxide according to the wet method with an inorganic acid or organic acid in the presence of...
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4288423 |
Method of recovering metallic tellurium
A method of recovering metallic tellurium from a residue dust containing a major amount of lead oxide, a minor amount of tellurium oxide, and a minor amount of iron oxide which comprises the steps...
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4231993 |
Recovery of metal values from lead smelter matte
A multi-step process for recovering metal values from lead smelter matte. The matte is mixed with sulfuric acid and manganese oxide and leaching is effected at atmospheric pressure to form an...
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4206183 |
Method of removing mercury-containing contaminations in gases
The present invention relates to a method of removing mercury-containing contaminations in gases by passing the gas to be purified through a filter bed which is devised to make the gas contact...
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4157946 |
Process for selective removal of bismuth and antimony from an electrolyte, especially in electrolytic refining of copper
Antimony and bismuth are selectively removed from an electrolyte solution, especially a solution used for the electrolytic refining of copper by adding to the electrolyte solution a carbonate of...
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4118219 |
Process for recycling junk lead-acid batteries
A hydrometallurgical process for recycling the paste and electrolyte of junk lead-acid batteries begins by separating the paste and electrolyte from the junk batteries. The paste and electrolyte...
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4024055 |
Method of reducing lead and acid waste contamination in battery plant operation
A method of reducing the sulfate ion and sulfuric acid contamination of waste water in lead-acid battery manufacturing operations and recovery of the lead in salvageable form is provided which...
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4004921 |
Treatment of lead sulphide
A process for the treatment of lead sulphide with an aqueous solution of sulphur dioxide at a temperature of at least 20° C and in the absence of oxygen is disclosed. In a preferred embodiment the...
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3855402 |
PROCESS FOR PRODUCTION OF TRIBASIC LEAD SULPHATE MONOHYDRATE
Preparation of basic sulphates of lead including tribasic lead sulphate monohydrate and two novel compounds, namely a basic lead ammonium sulphate (designated β compound) and a poorly crystalline...
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3668143 |
PREPARATION OF PHOSPHORS BY PRECIPITATION FROM SOLUTION
Inorganic phosphors are prepared by separately introducing the anions and cations to form the phosphor into a reaction solution; maintaining in the reaction solution, throughout the reaction, an...
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3668142 |
PREPARATION OF PHOSPHORS
Inorganic phosphors are prepared by separately introducing the anions and cations to form the phosphor into a reaction solution; maintaining in the reaction solution, throughout the reaction, an...
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3529957 |
PRODUCTION OF ELEMENTAL SULPHUR AND IRON FROM IRON SULPHIDES
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3449166 |
PROCESS FOR THE PRODUCTION OF FILLING MATERIALS FOR GALVANIC ELEMENTS
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3370963 |
Growth of divalent metal aluminates
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3323859 |
Process for the preparation of dibasic lead salts of inorganic acids
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3316059 |
Process for the acid oxidation of lead and zinc sulphides
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3241951 |
Oxidation of lead sulphides to form lead sulphate for subsequent production of lead
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3194685 |
Method of manufacturing storage battery electrode active material
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3128247 |
Ion exchange
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2981776 |
Storage battery material
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2853362 |
Process of producing perchlorates from chlorates
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2575088 |
Electric accumulators
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2514115 |
Method of dissolving difficultly soluble metal sulfates
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2315188 |
Method of treating basic lead sulphate
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2249330 |
Lead sulphate
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2219404 |
Method of making battery paste
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2182479 |
Lead oxide and method of preparation
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2134528 |
Treatment of lead bearing cres and the preparation of compounds therefrom
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2121887 |
Method of sulphating an ore material
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2068690 |
Method of recovering compounds from zinc and lead ores
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2067778 |
Method of treating complex lead bearing ore materials
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2054226 |
Method of treating lead sulphide ores
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2018438 |
Process of making pigments from lead ores
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2000661 |
Process of making pigments from lead ores
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1937637 |
Process of treating lead sulphide ores
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1937636 |
Process of treating lead-zinc sulphide ores
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