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Chemistry of inorganic compounds

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
423210000 MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE 1251
423414000 CARBON OR COMPOUND THEREOF 767
423324000 SILICON OR COMPOUND THEREOF 548
423579000 OXYGEN OR COMPOUND THEREOF 381
423644000 HYDROGEN OR COMPOUND THEREOF 376
423001000 TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND 343
423351000 NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID) 242
423462000 HALOGEN OR COMPOUND THEREOF 188
423700000 ZEOLITE 130
423511000 SULFUR OR COMPOUND THEREOF 127
423299000 PHOSPHORUS OR COMPOUND THEREOF 115
423276000 BORON OR COMPOUND THEREOF 94
423263000 RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71) 93
423508000 SELENIUM OR TELLURIUM OR COMPOUND THEREOF 43
423249000 RADIOACTIVE (AT. NO. 84+ OR RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT) 23
423265000 WITH ADDITIVE 19
423262000 INERT OR NOBLE GAS OR COMPOUND THEREOF 9
423658500 EXTRACTING, LEACHING, OR DISSOLVING 2
20130121910CONTROLLED 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
20120301392Heap 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

Patent applications in all subclasses Chemistry of inorganic compounds