Process for recovering lead,lead alloys,and lead compositions from batteries
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Hydrometallurgical process for the recovery of high pure copper values from copper and zinc bearing materials and for the incidental production of potassium sulfate
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Method and apparatus for treating molten metal with gas
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Electrodeposition of metals
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Process of treating drosses
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Pipe closure
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Improvements in or relating to the purification of antimonial lead alloys
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Drill point and method of making the same
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Method of thawing ground
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Electrolytic refining of metals
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Method of controlling evolutions of elemental sulphur
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Electrolytic refining of metals
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Method of making the arsenate of calcium and analogous elements
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Improvements in or relating to purifying antimonial lead alloys or other antimonial metals
