|
US1055158A
|
|
Electrolytic recovery of zinc and manganese.
|
|
GB191222078A
|
|
Production of Manganese Sulphate.
|
|
GB191222077A
|
|
Process for the Treatment of Refractory Complex Zinc Lead Ores.
|
|
US1055157A
|
|
Electrolytic recovery of zinc and manganese.
|
|
CA145244A
|
|
Production of manganese, sulphate and sulphuric acid
|
|
CA140402A
|
|
Zinc and manganese production
|
|
US1065678A
|
|
Treatment for the precipitation of ore values from the effluent waters of ore crushing and concentrating plants.
|
|
US1041060A
|
|
Process for the treatment of refractory zinc-lead ores.
|
|
CA135794A
|
|
Ore precipitation
|
|
CA136341A
|
|
Method of reducing zinz lead ores
|
|
CA102270A
|
|
Method obtaining ammonium chloride
|
|
US882460A
|
|
Process of manufacturing ammonium chlorid.
|
