A METHOD FOR PURIFICATION OF CIRCULATING LEACHING SOLUTIONS FROM PHOSPHATES AND FLUORIDES
The present invention relates to a method for purification of acidic solutions of salts, in particularly those formed in the course of complex apatite processing yielding rare-earth metal (REM) concentrate from phosphorus, fluorine and alkali metals impurities comprising precipitation of phosphorus...
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| creator | SAFIULINA, Alfiya Minerovna SHVETSOV, Sergey Vladimirovich SPIRIDONOV, Vasiliy Sergeevich KOMKOV, Aleksey Aleksandrovich EVTUSHENKO, Aleksey Vladimirovich GENKIN, Mikhail Vladimirovich |
| description | The present invention relates to a method for purification of acidic solutions of salts, in particularly those formed in the course of complex apatite processing yielding rare-earth metal (REM) concentrate from phosphorus, fluorine and alkali metals impurities comprising precipitation of phosphorus and fluorine in the form of calcium phosphates and fluorides and alkali metals in the form of silicofluorides of alkali metals. In some embodiments before the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals, acid is selectively extracted into an organic extractant, and after the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals the acid is may be re-extracted from the extractant into an aqueous solution. Methods allow for the removal of phosphorus, fluorine and alkali metals impurities and regeneration of the acid. |
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In some embodiments before the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals, acid is selectively extracted into an organic extractant, and after the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals the acid is may be re-extracted from the extractant into an aqueous solution. Methods allow for the removal of phosphorus, fluorine and alkali metals impurities and regeneration of the acid.</description><language>eng ; fre ; ger</language><subject>CHEMISTRY ; COMPOUNDS THEREOF ; INORGANIC CHEMISTRY ; METALLURGY ; NON-METALLIC ELEMENTS ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TRANSPORTING ; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</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=20170301&DB=EPODOC&CC=EP&NR=2984042A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170301&DB=EPODOC&CC=EP&NR=2984042A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SAFIULINA, Alfiya Minerovna</creatorcontrib><creatorcontrib>SHVETSOV, Sergey Vladimirovich</creatorcontrib><creatorcontrib>SPIRIDONOV, Vasiliy Sergeevich</creatorcontrib><creatorcontrib>KOMKOV, Aleksey Aleksandrovich</creatorcontrib><creatorcontrib>EVTUSHENKO, Aleksey Vladimirovich</creatorcontrib><creatorcontrib>GENKIN, Mikhail Vladimirovich</creatorcontrib><title>A METHOD FOR PURIFICATION OF CIRCULATING LEACHING SOLUTIONS FROM PHOSPHATES AND FLUORIDES</title><description>The present invention relates to a method for purification of acidic solutions of salts, in particularly those formed in the course of complex apatite processing yielding rare-earth metal (REM) concentrate from phosphorus, fluorine and alkali metals impurities comprising precipitation of phosphorus and fluorine in the form of calcium phosphates and fluorides and alkali metals in the form of silicofluorides of alkali metals. In some embodiments before the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals, acid is selectively extracted into an organic extractant, and after the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals the acid is may be re-extracted from the extractant into an aqueous solution. Methods allow for the removal of phosphorus, fluorine and alkali metals impurities and regeneration of the acid.</description><subject>CHEMISTRY</subject><subject>COMPOUNDS THEREOF</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNjE0KwjAQRrNxIeod5gKC1Cx0OaQTE0gzIT-LrkqRuBIt1PtjCx7A1fcePL6t6BE6yoZb0BwhlGi1VZgte2ANykZV3KL-Bo5QmRUSu7IGCXTkDoLhFAxmSoB-uXGFo20p7cXmMT7nevjtToCmrMyxTu-hztN4r6_6GSg014s8yQbl-Y_kC8gJMUY</recordid><startdate>20170301</startdate><enddate>20170301</enddate><creator>SAFIULINA, Alfiya Minerovna</creator><creator>SHVETSOV, Sergey Vladimirovich</creator><creator>SPIRIDONOV, Vasiliy Sergeevich</creator><creator>KOMKOV, Aleksey Aleksandrovich</creator><creator>EVTUSHENKO, Aleksey Vladimirovich</creator><creator>GENKIN, Mikhail Vladimirovich</creator><scope>EVB</scope></search><sort><creationdate>20170301</creationdate><title>A METHOD FOR PURIFICATION OF CIRCULATING LEACHING SOLUTIONS FROM PHOSPHATES AND FLUORIDES</title><author>SAFIULINA, Alfiya Minerovna ; SHVETSOV, Sergey Vladimirovich ; SPIRIDONOV, Vasiliy Sergeevich ; KOMKOV, Aleksey Aleksandrovich ; EVTUSHENKO, Aleksey Vladimirovich ; GENKIN, Mikhail Vladimirovich</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2984042A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS THEREOF</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</topic><toplevel>online_resources</toplevel><creatorcontrib>SAFIULINA, Alfiya Minerovna</creatorcontrib><creatorcontrib>SHVETSOV, Sergey Vladimirovich</creatorcontrib><creatorcontrib>SPIRIDONOV, Vasiliy Sergeevich</creatorcontrib><creatorcontrib>KOMKOV, Aleksey Aleksandrovich</creatorcontrib><creatorcontrib>EVTUSHENKO, Aleksey Vladimirovich</creatorcontrib><creatorcontrib>GENKIN, Mikhail Vladimirovich</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SAFIULINA, Alfiya Minerovna</au><au>SHVETSOV, Sergey Vladimirovich</au><au>SPIRIDONOV, Vasiliy Sergeevich</au><au>KOMKOV, Aleksey Aleksandrovich</au><au>EVTUSHENKO, Aleksey Vladimirovich</au><au>GENKIN, Mikhail Vladimirovich</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>A METHOD FOR PURIFICATION OF CIRCULATING LEACHING SOLUTIONS FROM PHOSPHATES AND FLUORIDES</title><date>2017-03-01</date><risdate>2017</risdate><abstract>The present invention relates to a method for purification of acidic solutions of salts, in particularly those formed in the course of complex apatite processing yielding rare-earth metal (REM) concentrate from phosphorus, fluorine and alkali metals impurities comprising precipitation of phosphorus and fluorine in the form of calcium phosphates and fluorides and alkali metals in the form of silicofluorides of alkali metals. In some embodiments before the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals, acid is selectively extracted into an organic extractant, and after the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals the acid is may be re-extracted from the extractant into an aqueous solution. Methods allow for the removal of phosphorus, fluorine and alkali metals impurities and regeneration of the acid.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
| title | A METHOD FOR PURIFICATION OF CIRCULATING LEACHING SOLUTIONS FROM PHOSPHATES AND FLUORIDES |
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