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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 4629501 |
Method for manufacture of antimony of high purity |
Dec. 16, 1986 |
| 4629503 |
Process for the recovery of tungsten in a pure form from tungsten-containing materials |
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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