Preparation method of low-chromium ammonium polyvanadate
The invention discloses a preparation method of low-chromium ammonium polyvanadate, and relates to the field of wet vanadium extraction. The preparation method comprises the following steps that a certain amount of sodium vanadium solution is measured, the pH value of the solution is adjusted to be...
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| creator | JIANG LIN WU ZHENXIU WANG JINGPENG RAO YUZHONG |
| description | The invention discloses a preparation method of low-chromium ammonium polyvanadate, and relates to the field of wet vanadium extraction. The preparation method comprises the following steps that a certain amount of sodium vanadium solution is measured, the pH value of the solution is adjusted to be alkalescent, an impurity removing agent is added, impurities such as silicon and phosphorus are removed, purified vanadium solution is obtained, and the dosage of the impurity removing agent is calculated according to the formula that n (Al): n (Si) = 0.8-1.2; the pH value of the purified vanadium liquid is adjusted to be acidic, H2O2 is added for a reaction, Cr < 6 + > is reduced to Cr < 3 + >, and a reduction solution is obtained; triethanolamine is added into the reduction solution, the Cr < 3 + > is subjected to a complexation reaction, a first solution is obtained, the dosage of triethanolamine is calculated according to the ratio of m (C6H15NO3): m (Cr) = 0.5-1.0, and the complexation time is 10-30 min; and a |
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The preparation method comprises the following steps that a certain amount of sodium vanadium solution is measured, the pH value of the solution is adjusted to be alkalescent, an impurity removing agent is added, impurities such as silicon and phosphorus are removed, purified vanadium solution is obtained, and the dosage of the impurity removing agent is calculated according to the formula that n (Al): n (Si) = 0.8-1.2; the pH value of the purified vanadium liquid is adjusted to be acidic, H2O2 is added for a reaction, Cr < 6 + > is reduced to Cr < 3 + >, and a reduction solution is obtained; triethanolamine is added into the reduction solution, the Cr < 3 + > is subjected to a complexation reaction, a first solution is obtained, the dosage of triethanolamine is calculated according to the ratio of m (C6H15NO3): m (Cr) = 0.5-1.0, and the complexation time is 10-30 min; and a</description><language>chi ; eng</language><subject>CHEMISTRY ; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ; INORGANIC CHEMISTRY ; METALLURGY</subject><creationdate>2024</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=20240312&DB=EPODOC&CC=CN&NR=117682556A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240312&DB=EPODOC&CC=CN&NR=117682556A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>JIANG LIN</creatorcontrib><creatorcontrib>WU ZHENXIU</creatorcontrib><creatorcontrib>WANG JINGPENG</creatorcontrib><creatorcontrib>RAO YUZHONG</creatorcontrib><title>Preparation method of low-chromium ammonium polyvanadate</title><description>The invention discloses a preparation method of low-chromium ammonium polyvanadate, and relates to the field of wet vanadium extraction. The preparation method comprises the following steps that a certain amount of sodium vanadium solution is measured, the pH value of the solution is adjusted to be alkalescent, an impurity removing agent is added, impurities such as silicon and phosphorus are removed, purified vanadium solution is obtained, and the dosage of the impurity removing agent is calculated according to the formula that n (Al): n (Si) = 0.8-1.2; the pH value of the purified vanadium liquid is adjusted to be acidic, H2O2 is added for a reaction, Cr < 6 + > is reduced to Cr < 3 + >, and a reduction solution is obtained; triethanolamine is added into the reduction solution, the Cr < 3 + > is subjected to a complexation reaction, a first solution is obtained, the dosage of triethanolamine is calculated according to the ratio of m (C6H15NO3): m (Cr) = 0.5-1.0, and the complexation time is 10-30 min; and a</description><subject>CHEMISTRY</subject><subject>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAIKEotSCxKLMnMz1PITS3JyE9RyE9TyMkv103OKMrPzSzNVUjMzc3PAzEK8nMqyxLzElMSS1J5GFjTEnOKU3mhNDeDoptriLOHbmpBfnxqcUFicmpeakm8s5-hobmZhZGpqZmjMTFqAE49Lvo</recordid><startdate>20240312</startdate><enddate>20240312</enddate><creator>JIANG LIN</creator><creator>WU ZHENXIU</creator><creator>WANG JINGPENG</creator><creator>RAO YUZHONG</creator><scope>EVB</scope></search><sort><creationdate>20240312</creationdate><title>Preparation method of low-chromium ammonium polyvanadate</title><author>JIANG LIN ; WU ZHENXIU ; WANG JINGPENG ; RAO YUZHONG</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN117682556A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2024</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><toplevel>online_resources</toplevel><creatorcontrib>JIANG LIN</creatorcontrib><creatorcontrib>WU ZHENXIU</creatorcontrib><creatorcontrib>WANG JINGPENG</creatorcontrib><creatorcontrib>RAO YUZHONG</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>JIANG LIN</au><au>WU ZHENXIU</au><au>WANG JINGPENG</au><au>RAO YUZHONG</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Preparation method of low-chromium ammonium polyvanadate</title><date>2024-03-12</date><risdate>2024</risdate><abstract>The invention discloses a preparation method of low-chromium ammonium polyvanadate, and relates to the field of wet vanadium extraction. 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| subjects | CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F INORGANIC CHEMISTRY METALLURGY |
| title | Preparation method of low-chromium ammonium polyvanadate |
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