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Class Information
Number: 75/420
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > At 300 degrees c or greater (e.g., pyrometallurgy, etc.) > Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) > Step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions after a step at 300 degrees c or greater > Step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions is reduction to free metal
Description: Process wherein reduction to free metal occurs in a step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions, which step is after a step at over 300 degrees C.










Sub-classes under this class:

Class Number Class Name Patents
75/424 Copper(cu) 17
75/425 Iron(fe), cobalt(co), or nickel(ni) 16
75/421 Noble metal 22


Patents under this class:

Patent Number Title Of Patent Date Issued
8475749 Process for recovery of noble metals from functionalised, noble metal-containing adsorption materials Jul. 2, 2013
8308843 Method and device using pyrolysis for recycling used printed circuit board Nov. 13, 2012
6835228 Process of recovering valuable metals from waste secondary batteries Dec. 28, 2004
6193941 Process for producing a metallurgical raw material from oil containing heavy metals Feb. 27, 2001
5851490 Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams Dec. 22, 1998
5846290 Method for the recovery of group IA salts during the treatment of industrial process waste streams Dec. 8, 1998
5683488 Method for producing an iron feedstock from industrial furnace waste streams Nov. 4, 1997
5667553 Methods for recycling electric arc furnace dust Sep. 16, 1997
5667555 Method for the removal of calcium by products during the production of an iron feedstock Sep. 16, 1997
5538532 Methods for recycling electric arc furnace dust Jul. 23, 1996
5538532 Methods for recycling electric arc furnace dust Jul. 23, 1996
4915730 Process and apparatus for recovery of flue dust Apr. 10, 1990
4889694 Recovery of zinc values from zinc and iron-bearing sulfide materials Dec. 26, 1989
4629503 Process for the recovery of tungsten in a pure form from tungsten-containing materials Dec. 16, 1986
4629501 Method for manufacture of antimony of high purity Dec. 16, 1986
4556422 Process for the recovery of lead and silver chlorides Dec. 3, 1985
4230487 Method of selectively bringing into solution the non-ferrous metals contained in sulphurized ores and concentrates Oct. 28, 1980
4168969 Recovery of silver, copper, zinc and lead from partially roasted pyrite concentrate by acid chloride leaching Sep. 25, 1979
4083920 Treatment of tri(alkaline earth metal) tungstates with acids Apr. 11, 1978
4057423 Method for the manufacture of mercury free sulfuric acid Nov. 8, 1977
4029499 Recovery of gallium Jun. 14, 1977
3985556 Reduction of laterite ores Oct. 12, 1976
3969108 Recovery of gallium Jul. 13, 1976
3964901 Production of copper and sulfur from copper-iron sulfides Jun. 22, 1976
3954451 Method for the manufacture of mercury free sulfuric acid May. 4, 1976











 
 
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