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| Number | Title | Issue Date |
| 4329170 | Method of treating sulfur-containing metallurgical materials In the processing of sulfur-containing metallurgical intermediates, sulfide ores or ore concentrates at a flame temperature of at least 1500° C. in which sulfur dioxide and a melt are formed, acid sludge from the acid treatment of petroleum and mineral o... | 05/11/1982 |
| 4263120 | Electrolytic cell for the recovery of nonferrous metals and improved anode therefor An anode for a cell for electrolytic recovery of nonferrous metals especially copper is provided with a plate-shaped deposition surface, a hanger for suspending the anode in the cell, and a perforated pipe along a bottom edge of the anode for discharging ... | 04/21/1981 |
| 4245821 | Refining furnace for nonferrous metal A furnace for the refining of nonferrous metal such as copper comprising a drum structure rotatable about a substantially horizontal axis and formed along the same side of the shell with a tapping box for discharging the molten metal and a slag-dischargin... | 01/20/1981 |
| 4200265 | Furnace for the melting and refining of copper A furnace for the melting and refining of raw copper and/or blister copper comprises a shaft furnace having a lock-chamber feeder for the material at the top of the shaft furnace and an opening into a hearth furnace in which the copper is refined. The sha... | 04/29/1980 |
| 4133892 | Combating pests with di-[2-thioureido-(N-alkoxycarbonyl)-N-phenylureido]-compounds Di[2-thioureido-(N-Alkoxycarbonyl)-N-phenylureides] of the formula ##STR1## wherein R1 is hydrogen, halogen, or an alkoxy or alkyl radical having 1 to 4 C atoms, R2 is an alkyl radical having 1 to 4 C atoms, and R3 is an a... | 01/09/1979 |
| 4065250 | Method of independently adjusting the fuel mixture composition and melting rate of multiburner shaft furnaces for melting metals A method of independently adjusting the fuel mixture composition and heating rate for a multiburner shaft furnace for the melting of metal, particularly copper and its alloys, fed in lump form to the shaft furnace, in which the burners are supplied with a... | 12/27/1977 |
| 4046687 | Process for the adsorptive removal of arsenic, antimony and/or bismuth from an aqueous solution A process for the adsorptive removal of one or more impurity elements, selected from the group which consists of: arsenic, antimony and bismuth, from an aqueous solution containing same in which the solution is contacted with a water-insoluble or low-solu... | 09/06/1977 |
| 4044045 | Combating pests with di-(2-thioureido-(N-alkoxycarbonyl)-N-phenylureido)-compounds Di-[2-thioureido-(N-Alkoxycarbonyl)-N-phenylureides] of the formula ##STR1## wherein R1 is hydrogen, halogen, or an alkoxy or alkyl radical having 1 to 4 C atoms, R2 is an alkyl radical having 1 to 4 C atoms, and R3 is an ... | 08/23/1977 |
| 3988225 | Method of preventing the supersaturation of electrolyte solutions with one or more of the impurities arsenic, antimony and bismuth, in the electrolytic refining of nonferrous metals, especially copper A process for the prevention of supersaturation of electrolytes from nonferrous metal refining (preferably copper refining) with arsenic, antimony and bismuth in which the electrolyte solution is brought into contact with a chemisorption agent on a flat s... | 10/26/1976 |
| 3947612 | Method of forming active surfaces on solids A method of forming an active surface on a solid, e.g. for use of the solid as an adsorbent, catalyst carrier or contact or reactant catalyst, comprising adding a mixture of binders to a solution or suspension of an activatable substance (reactant), the b... | 03/30/1976 |
