GOLD SOLVENT EXTRACTION
The present invention provides a method of extracting gold from pregnant leach solution (PLS) obtained from leaching of gold, comprising the steps of: (a) extracting the PLS with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a first organic phase com...
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| creator | HAAPALAINEN, Mika KARONEN, Janne |
| description | The present invention provides a method of extracting gold from pregnant leach solution (PLS) obtained from leaching of gold, comprising the steps of: (a) extracting the PLS with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a first organic phase comprising gold; (b) stripping gold from the first organic phase with a first water to obtain a first aqueous raffinate comprising gold and a first depleted organic phase; (c) adding HCl and NaCl into the first aqueous raffinate to increase its acid content to at least 8 g/L and chloride content to at least 30 g/L to obtain a first aqueous solution comprising gold; (d) extracting the first aqueous solution with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a second organic phase comprising gold; (e) stripping gold from the second organic phase with a second water solution to obtain a second aqueous raffinate comprising gold and a second depleted organic phase; (f) optionally repeating steps (c) to (e) one or more times to obtain a final aqueous raffinate comprising gold. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_EP3152338A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>EP3152338A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_EP3152338A13</originalsourceid><addsrcrecordid>eNrjZBB39_dxUQj29wlz9QtRcI0ICXJ0DvH09-NhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuAcaGpkbGxhaOhsZEKAEApfcfKg</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>GOLD SOLVENT EXTRACTION</title><source>esp@cenet</source><creator>HAAPALAINEN, Mika ; KARONEN, Janne</creator><creatorcontrib>HAAPALAINEN, Mika ; KARONEN, Janne</creatorcontrib><description>The present invention provides a method of extracting gold from pregnant leach solution (PLS) obtained from leaching of gold, comprising the steps of: (a) extracting the PLS with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a first organic phase comprising gold; (b) stripping gold from the first organic phase with a first water to obtain a first aqueous raffinate comprising gold and a first depleted organic phase; (c) adding HCl and NaCl into the first aqueous raffinate to increase its acid content to at least 8 g/L and chloride content to at least 30 g/L to obtain a first aqueous solution comprising gold; (d) extracting the first aqueous solution with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a second organic phase comprising gold; (e) stripping gold from the second organic phase with a second water solution to obtain a second aqueous raffinate comprising gold and a second depleted organic phase; (f) optionally repeating steps (c) to (e) one or more times to obtain a final aqueous raffinate comprising gold.</description><language>eng ; fre ; ger</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>2017</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=20170412&DB=EPODOC&CC=EP&NR=3152338A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170412&DB=EPODOC&CC=EP&NR=3152338A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HAAPALAINEN, Mika</creatorcontrib><creatorcontrib>KARONEN, Janne</creatorcontrib><title>GOLD SOLVENT EXTRACTION</title><description>The present invention provides a method of extracting gold from pregnant leach solution (PLS) obtained from leaching of gold, comprising the steps of: (a) extracting the PLS with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a first organic phase comprising gold; (b) stripping gold from the first organic phase with a first water to obtain a first aqueous raffinate comprising gold and a first depleted organic phase; (c) adding HCl and NaCl into the first aqueous raffinate to increase its acid content to at least 8 g/L and chloride content to at least 30 g/L to obtain a first aqueous solution comprising gold; (d) extracting the first aqueous solution with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a second organic phase comprising gold; (e) stripping gold from the second organic phase with a second water solution to obtain a second aqueous raffinate comprising gold and a second depleted organic phase; (f) optionally repeating steps (c) to (e) one or more times to obtain a final aqueous raffinate comprising gold.</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>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB39_dxUQj29wlz9QtRcI0ICXJ0DvH09-NhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuAcaGpkbGxhaOhsZEKAEApfcfKg</recordid><startdate>20170412</startdate><enddate>20170412</enddate><creator>HAAPALAINEN, Mika</creator><creator>KARONEN, Janne</creator><scope>EVB</scope></search><sort><creationdate>20170412</creationdate><title>GOLD SOLVENT EXTRACTION</title><author>HAAPALAINEN, Mika ; KARONEN, Janne</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3152338A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</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>HAAPALAINEN, Mika</creatorcontrib><creatorcontrib>KARONEN, Janne</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HAAPALAINEN, Mika</au><au>KARONEN, Janne</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>GOLD SOLVENT EXTRACTION</title><date>2017-04-12</date><risdate>2017</risdate><abstract>The present invention provides a method of extracting gold from pregnant leach solution (PLS) obtained from leaching of gold, comprising the steps of: (a) extracting the PLS with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a first organic phase comprising gold; (b) stripping gold from the first organic phase with a first water to obtain a first aqueous raffinate comprising gold and a first depleted organic phase; (c) adding HCl and NaCl into the first aqueous raffinate to increase its acid content to at least 8 g/L and chloride content to at least 30 g/L to obtain a first aqueous solution comprising gold; (d) extracting the first aqueous solution with an organic extractant comprising an organic diester and an organic long-chain alcohol to obtain a second organic phase comprising gold; (e) stripping gold from the second organic phase with a second water solution to obtain a second aqueous raffinate comprising gold and a second depleted organic phase; (f) optionally repeating steps (c) to (e) one or more times to obtain a final aqueous raffinate comprising gold.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| 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 | GOLD SOLVENT EXTRACTION |
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