Matches 151 - 175 out of 175 < 1 2 3 4

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3959449 Method of recovering heavy metal [-bromine] bromides and hydrobromic acid catalysts for liquid-phase oxidation [catalyst]  
A method of recovering in highly pure states heavy metals such as cobalt, manganese, etc., and bromine without the contamination of organic impurities and heavy metal impurities from the residue...
3951790 Thiuram polysulfide heavy metal remover  
A polymeric compound having thiuram mono- or poly-sulfide linkage shows noteworthy property for removing and collecting heavy metals from the environment. Especially, said compound can remove...
3937785 Treatment of chromium ore residues to suppress pollution  
Method for treating solid ore residue obtained by production of chromium chemicals from chromite ore, to reduce leaching of chromium compounds therefrom after disposal, which involves reducing the...
3897546 Method of cooling or heating fluidized beds  
A method for adjusting and controlling the temperature in chemical reaction, that is, of cooling or heating fluidized beds wherein the fluidized bed is demixed into two or more sectional fluidized...
3885017 Hydrometallurgical leaching  
A process and apparatus for hydrometallurgical leaching of unseparated, crushed mineral ores using a vessel having liquid stream forming nozzles in the lower portion thereof which operate to...
3878287 Charging of kiln with granular material  
In the operation of a kiln including feeding a granular material by means of a gas into said kiln, advancing said material through said kiln and removing a product from said kiln, the improvement...
3870060 Method of removing monovalent inorganic acids from an aqueous solution containing metal salts of the acids  
Monovalent inorganic acids such as hydrofluoric acid can be removed from spent pickling baths by bringing the bath, which shall have a content of sulphuric acid at least equivalent to the metal...
3863002 STATIC LEACHING PROCESS  
The present invention relates to a method for leaching a mineral from an ore containing said mineral wherein a lixiviant is introduced under pressure into a vessel containing a bed of ore which...
3807987 OIL SOOT HANDLING SYSTEM  
Valuable metals, particularly vanadium, may be recovered from oil soot by firing crude oil to produce oil soot, collecting the soot, and recycling the collected soot for refiring until...
3708420 CATALYST TRANSFER IN A PLURAL BED HYDROGENATION PROCESS  
The invention relates to a process for the hydrogenation of hydrocarbon feedstocks in a reactor comprising a number of catalyst beds through which fluidized catalyst descends in countercurrent to...
3525606 VIBRATIONAL METHOD FOR PENETRATING,LEACHING AND EXTRACTING MINERALS  
3585024 UPGRADING THE TANTALUM AND COLUMBIUM CONTENTS OF TIN SLAGS  
3475346 INHIBITING IRON SULFIDE FROM ATTACK BY AN AQUEOUS ACID SOLUTION  
3460937 METHOD FOR RECOVERING VANADIUM FROM IRON-BASE ALLOYS  
3238023 Fluidized bed reactor  
3135597 Treatment of complex ores  
3100701 Continuous process mineral separation  
3074786 Fluid mixer with rotating baffles and method of operating same  
3025131 Process for the removal of carbonates from carbonate-containing ores  
2981590 Method of controlling temperature in reactivating catalysts  
2898197 Method of treating pyrrhotitic mineral sulphides containing non-ferrous metal values  
2870002 Method of fluidization  
2870001 Method of fluidization  
2860964 Method of roasting sulphur ores in suspension  
2848313 Method of chemically disintegrating and pulverizing solid material  
Matches 151 - 175 out of 175 < 1 2 3 4