PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE
The invention relates to a process for leaching gold and silver from ores and ore concentrates using a cyanide-containing leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 mg O2/l. The leaching is carried out according to the invention in the presence of deco...
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | MATHIAS STOLL STEVEN GOS JURGEN LOROSCH HELMUT KNORRE ANNETTE ZIEGLER |
| description | The invention relates to a process for leaching gold and silver from ores and ore concentrates using a cyanide-containing leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 mg O2/l. The leaching is carried out according to the invention in the presence of decomposition catalysts, and the cyano complexes which are formed are preferably separated from the leaching solution during leaching. Decomposition catalysts are manganese compounds - 0.01 to 1 mg calculated as Mn/l barren solution or 1 to 50 mg calculated as Mn/kg ore pulp - or inorganic or organic polymers or carbon. Active carbon is preferably employed in an amount of 1-20 g/l of leaching solution, because this decomposes H2O2 and simultaneously adsorbs noble metal cyano complexes. The process leads to a reduced consumption of H2O2 and, where appropriate, cyanide and maximum yields of gold with shortened leaching times. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_AU614420BB2</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>AU614420BB2</sourcerecordid><originalsourceid>FETCH-epo_espacenet_AU614420BB23</originalsourceid><addsrcrecordid>eNqNykEKwjAQheFuXIh6hzmAgtbifpJOm0CcKUkKdlWKxJVood4fLQhuXT343r_MUuNFUwhQiQdHqI3lGliUIzhTRBegDTPh7w3i2miFQQtHtDyb7pBtSVtALsF0pZeaGBrycvnwOlvchvuUNt9dZVBR1GaXxmefpnG4pkd69dieDkWR75XKj38kb_nmNDw</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE</title><source>esp@cenet</source><creator>MATHIAS STOLL ; STEVEN GOS ; JURGEN LOROSCH ; HELMUT KNORRE ; ANNETTE ZIEGLER</creator><creatorcontrib>MATHIAS STOLL ; STEVEN GOS ; JURGEN LOROSCH ; HELMUT KNORRE ; ANNETTE ZIEGLER</creatorcontrib><description>The invention relates to a process for leaching gold and silver from ores and ore concentrates using a cyanide-containing leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 mg O2/l. The leaching is carried out according to the invention in the presence of decomposition catalysts, and the cyano complexes which are formed are preferably separated from the leaching solution during leaching. Decomposition catalysts are manganese compounds - 0.01 to 1 mg calculated as Mn/l barren solution or 1 to 50 mg calculated as Mn/kg ore pulp - or inorganic or organic polymers or carbon. Active carbon is preferably employed in an amount of 1-20 g/l of leaching solution, because this decomposes H2O2 and simultaneously adsorbs noble metal cyano complexes. The process leads to a reduced consumption of H2O2 and, where appropriate, cyanide and maximum yields of gold with shortened leaching times.</description><edition>5</edition><language>eng</language><subject>CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; PRETREATMENT OF RAW MATERIALS ; PRODUCTION AND REFINING OF METALS ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1991</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910829&DB=EPODOC&CC=AU&NR=614420B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910829&DB=EPODOC&CC=AU&NR=614420B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MATHIAS STOLL</creatorcontrib><creatorcontrib>STEVEN GOS</creatorcontrib><creatorcontrib>JURGEN LOROSCH</creatorcontrib><creatorcontrib>HELMUT KNORRE</creatorcontrib><creatorcontrib>ANNETTE ZIEGLER</creatorcontrib><title>PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE</title><description>The invention relates to a process for leaching gold and silver from ores and ore concentrates using a cyanide-containing leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 mg O2/l. The leaching is carried out according to the invention in the presence of decomposition catalysts, and the cyano complexes which are formed are preferably separated from the leaching solution during leaching. Decomposition catalysts are manganese compounds - 0.01 to 1 mg calculated as Mn/l barren solution or 1 to 50 mg calculated as Mn/kg ore pulp - or inorganic or organic polymers or carbon. Active carbon is preferably employed in an amount of 1-20 g/l of leaching solution, because this decomposes H2O2 and simultaneously adsorbs noble metal cyano complexes. The process leads to a reduced consumption of H2O2 and, where appropriate, cyanide and maximum yields of gold with shortened leaching times.</description><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>PRETREATMENT OF RAW MATERIALS</subject><subject>PRODUCTION AND REFINING OF METALS</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNykEKwjAQheFuXIh6hzmAgtbifpJOm0CcKUkKdlWKxJVood4fLQhuXT343r_MUuNFUwhQiQdHqI3lGliUIzhTRBegDTPh7w3i2miFQQtHtDyb7pBtSVtALsF0pZeaGBrycvnwOlvchvuUNt9dZVBR1GaXxmefpnG4pkd69dieDkWR75XKj38kb_nmNDw</recordid><startdate>19910829</startdate><enddate>19910829</enddate><creator>MATHIAS STOLL</creator><creator>STEVEN GOS</creator><creator>JURGEN LOROSCH</creator><creator>HELMUT KNORRE</creator><creator>ANNETTE ZIEGLER</creator><scope>EVB</scope></search><sort><creationdate>19910829</creationdate><title>PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE</title><author>MATHIAS STOLL ; STEVEN GOS ; JURGEN LOROSCH ; HELMUT KNORRE ; ANNETTE ZIEGLER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_AU614420BB23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1991</creationdate><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>PRETREATMENT OF RAW MATERIALS</topic><topic>PRODUCTION AND REFINING OF METALS</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>MATHIAS STOLL</creatorcontrib><creatorcontrib>STEVEN GOS</creatorcontrib><creatorcontrib>JURGEN LOROSCH</creatorcontrib><creatorcontrib>HELMUT KNORRE</creatorcontrib><creatorcontrib>ANNETTE ZIEGLER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MATHIAS STOLL</au><au>STEVEN GOS</au><au>JURGEN LOROSCH</au><au>HELMUT KNORRE</au><au>ANNETTE ZIEGLER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE</title><date>1991-08-29</date><risdate>1991</risdate><abstract>The invention relates to a process for leaching gold and silver from ores and ore concentrates using a cyanide-containing leaching solution and hydrogen peroxide and maintaining an oxygen concentration of 2 to 20 mg O2/l. The leaching is carried out according to the invention in the presence of decomposition catalysts, and the cyano complexes which are formed are preferably separated from the leaching solution during leaching. Decomposition catalysts are manganese compounds - 0.01 to 1 mg calculated as Mn/l barren solution or 1 to 50 mg calculated as Mn/kg ore pulp - or inorganic or organic polymers or carbon. Active carbon is preferably employed in an amount of 1-20 g/l of leaching solution, because this decomposes H2O2 and simultaneously adsorbs noble metal cyano complexes. The process leads to a reduced consumption of H2O2 and, where appropriate, cyanide and maximum yields of gold with shortened leaching times.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng |
| recordid | cdi_epo_espacenet_AU614420BB2 |
| source | esp@cenet |
| subjects | CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | PROCESS FOR LEACHING NOBLE METALS USING A LEACHING SOLUTION CONTAINING CYANIDE, AND HYDROGEN PEROXIDE |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-10T21%3A35%3A45IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=MATHIAS%20STOLL&rft.date=1991-08-29&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EAU614420BB2%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |