Chemistry of inorganic compounds
Patent class list (only not empty are listed)
Deeper subclasses:
Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|
423210000 | MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE | 2074 |
423414000 | CARBON OR COMPOUND THEREOF | 1161 |
423324000 | SILICON OR COMPOUND THEREOF | 769 |
423001000 | TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND | 671 |
423579000 | OXYGEN OR COMPOUND THEREOF | 551 |
423644000 | HYDROGEN OR COMPOUND THEREOF | 537 |
423351000 | NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID) | 372 |
423700000 | ZEOLITE | 289 |
423462000 | HALOGEN OR COMPOUND THEREOF | 242 |
423511000 | SULFUR OR COMPOUND THEREOF | 194 |
423299000 | PHOSPHORUS OR COMPOUND THEREOF | 167 |
423276000 | BORON OR COMPOUND THEREOF | 131 |
423263000 | RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71) | 116 |
423508000 | SELENIUM OR TELLURIUM OR COMPOUND THEREOF | 56 |
423265000 | WITH ADDITIVE | 41 |
423249000 | RADIOACTIVE (AT. NO. 84+ OR RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT) | 39 |
423262000 | INERT OR NOBLE GAS OR COMPOUND THEREOF | 13 |
423659000 | MISCELLANEOUS PROCESS | 12 |
423658500 | EXTRACTING, LEACHING, OR DISSOLVING | 2 |
20120301392 | Heap Leaching - A method of leaching a metal value from a heap of a metal-containing ore and a heap leaching operation are disclosed. The method includes establishing a downward flow of a leach liquor through a section of the heap by supplying the leach liquor onto a top surface of the section and allowing the leach liquor (containing metal values in solution) to drain from a lower part of the section. The method is characterized by supplying the leach liquor onto the top surface of the section at a flow rate that is sufficient so that the downwardly flowing leach liquor saturates the section of the heap. | 11-29-2012 |
20130121910 | CONTROLLED COPPER LEACH RECOVERY CIRCUIT - The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage. | 05-16-2013 |