Method of separating solvents from an elevated viscosity of sulfur presipitated with a solvent of a smaller viscosity (Machine-translation by Google Translate, not legally binding)
DE1138948B
Process for extracting the iron content from minerals containing Fe O groups in their molecular structure
US3105755A
Method for obtaining more economical extraction of the valuable constituents of those minerals which contain iron at lower states of oxidation than fe2o3 in their molecular structures
US3105756A
Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3
CA648911A
Method for obtaining more economical extraction of the valuable constituents of those minerals which contain iron at lower states of oxidation than fe2o3 in their molecular structures
CA664128A
Method of lowering the iron content of chromite ores or concentrates without appreciable lowering of the contained cr2o3
