INTEGRATED SERPENTINITE PROCESSING METHOD RESULTING IN PURE SILICA PRODUCTION
FIELD: industrial inorganic synthesis. ^ SUBSTANCE: invention comprises processing of serpentinite to produce following commercial products: pure silica, magnesium compounds, including magnesium chloride, magnesium metal, carnallite, iron- and nickel-containing concentrates. Serpentinite is leached...
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| creator | FREJDLINA R.G GULJAKIN A.I TETERIN V.V KOZLOV JU.A KOCHELAEV V.A SHCHELKONOGOV A.A JAKOVLEVA S.A SHIROKOV JU.I SABUROV L.N |
| description | FIELD: industrial inorganic synthesis. ^ SUBSTANCE: invention comprises processing of serpentinite to produce following commercial products: pure silica, magnesium compounds, including magnesium chloride, magnesium metal, carnallite, iron- and nickel-containing concentrates. Serpentinite is leached with hydrochloric acid solution containing 10-21% HCl at 60-100 and liquid-to-solids ratio (3-10):1 for 2 to 6 h under discontinuous or continuous countercurrent conditions to yield magnesium chloride solution and silica. The former is purified via two-step neutralization: first with brucite or caustic magnesite at 80-90 to pH 3.5-4.0 and then with sodium hydroxide solution to pH 6-7 including addition of sodium sulfide or hydrosulfide. ^ EFFECT: increased purity of silica product and enlarged number of commercial products and/or semiproducts. ^ 4 cl |
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Serpentinite is leached with hydrochloric acid solution containing 10-21% HCl at 60-100 and liquid-to-solids ratio (3-10):1 for 2 to 6 h under discontinuous or continuous countercurrent conditions to yield magnesium chloride solution and silica. The former is purified via two-step neutralization: first with brucite or caustic magnesite at 80-90 to pH 3.5-4.0 and then with sodium hydroxide solution to pH 6-7 including addition of sodium sulfide or hydrosulfide. ^ EFFECT: increased purity of silica product and enlarged number of commercial products and/or semiproducts. ^ 4 cl</description><edition>7</edition><language>eng ; rus</language><subject>CHEMISTRY ; COMPOUNDS THEREOF ; INORGANIC CHEMISTRY ; METALLURGY ; NON-METALLIC ELEMENTS</subject><creationdate>2004</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=20041227&DB=EPODOC&CC=RU&NR=2243154C2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76516</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20041227&DB=EPODOC&CC=RU&NR=2243154C2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FREJDLINA R.G</creatorcontrib><creatorcontrib>GULJAKIN A.I</creatorcontrib><creatorcontrib>TETERIN V.V</creatorcontrib><creatorcontrib>KOZLOV JU.A</creatorcontrib><creatorcontrib>KOCHELAEV V.A</creatorcontrib><creatorcontrib>SHCHELKONOGOV A.A</creatorcontrib><creatorcontrib>JAKOVLEVA S.A</creatorcontrib><creatorcontrib>SHIROKOV JU.I</creatorcontrib><creatorcontrib>SABUROV L.N</creatorcontrib><title>INTEGRATED SERPENTINITE PROCESSING METHOD RESULTING IN PURE SILICA PRODUCTION</title><description>FIELD: industrial inorganic synthesis. ^ SUBSTANCE: invention comprises processing of serpentinite to produce following commercial products: pure silica, magnesium compounds, including magnesium chloride, magnesium metal, carnallite, iron- and nickel-containing concentrates. 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Serpentinite is leached with hydrochloric acid solution containing 10-21% HCl at 60-100 and liquid-to-solids ratio (3-10):1 for 2 to 6 h under discontinuous or continuous countercurrent conditions to yield magnesium chloride solution and silica. The former is purified via two-step neutralization: first with brucite or caustic magnesite at 80-90 to pH 3.5-4.0 and then with sodium hydroxide solution to pH 6-7 including addition of sodium sulfide or hydrosulfide. ^ EFFECT: increased purity of silica product and enlarged number of commercial products and/or semiproducts. ^ 4 cl</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| title | INTEGRATED SERPENTINITE PROCESSING METHOD RESULTING IN PURE SILICA PRODUCTION |
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