Method for removing potassium from mother liquor in lithium hydroxide production
The invention provides a method for removing potassium from mother liquor in lithium hydroxide production. The method comprises the following steps: S1, adding sulfuric acid into the lithium hydroxide separation mother liquor for acidification; s2, heating the mother liquor obtained by acidification...
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| creator | FU XIAOYAN LUO FUJUN WEI DIANPING LI LIANGBIN AI GANGHUA WANG BIN XIAO JIAO LIU SHUQI LIU DEQIANG JIANG HONGYAN LI QIANG PENG YANLI LI QIAN |
| description | The invention provides a method for removing potassium from mother liquor in lithium hydroxide production. The method comprises the following steps: S1, adding sulfuric acid into the lithium hydroxide separation mother liquor for acidification; s2, heating the mother liquor obtained by acidification in the step S1, and supplementing sodium sulfate; s3, freezing and crystallizing the mother liquor obtained in the step S2, and filtering and separating solids and a sodium precipitation solution; and S4, returning the obtained sodium precipitation solution to a lithium hydroxide production system. The method is suitable for a low-cost and short-process potassium removal process for lithium hydroxide production, the potassium removal rate is greater than or equal to 50%, and the potassium content in a lithium hydroxide system can be effectively reduced.
本发明提供一种氢氧化锂生产母液除钾的方法。方法包括以下步骤：步骤S1：氢氧化锂分离母液加入硫酸酸化；步骤S2：加热所述步骤S1酸化所得母液后，补加硫酸钠；步骤S3：将所述步骤S2所得母液冷冻析晶，过滤分离固体和析钠溶液；步骤S4：所得析钠溶液返回氢氧化锂生产系统。本发明适合氢氧化锂生产的低成本、短流程除钾工艺，除钾率≥50% |
| format | Patent |
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本发明提供一种氢氧化锂生产母液除钾的方法。方法包括以下步骤：步骤S1：氢氧化锂分离母液加入硫酸酸化；步骤S2：加热所述步骤S1酸化所得母液后，补加硫酸钠；步骤S3：将所述步骤S2所得母液冷冻析晶，过滤分离固体和析钠溶液；步骤S4：所得析钠溶液返回氢氧化锂生产系统。本发明适合氢氧化锂生产的低成本、短流程除钾工艺，除钾率≥50%</description><language>chi ; eng</language><subject>CHEMISTRY ; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM ; INORGANIC CHEMISTRY ; METALLURGY</subject><creationdate>2023</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=20230307&DB=EPODOC&CC=CN&NR=115744939A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20230307&DB=EPODOC&CC=CN&NR=115744939A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FU XIAOYAN</creatorcontrib><creatorcontrib>LUO FUJUN</creatorcontrib><creatorcontrib>WEI DIANPING</creatorcontrib><creatorcontrib>LI LIANGBIN</creatorcontrib><creatorcontrib>AI GANGHUA</creatorcontrib><creatorcontrib>WANG BIN</creatorcontrib><creatorcontrib>XIAO JIAO</creatorcontrib><creatorcontrib>LIU SHUQI</creatorcontrib><creatorcontrib>LIU DEQIANG</creatorcontrib><creatorcontrib>JIANG HONGYAN</creatorcontrib><creatorcontrib>LI QIANG</creatorcontrib><creatorcontrib>PENG YANLI</creatorcontrib><creatorcontrib>LI QIAN</creatorcontrib><title>Method for removing potassium from mother liquor in lithium hydroxide production</title><description>The invention provides a method for removing potassium from mother liquor in lithium hydroxide production. The method comprises the following steps: S1, adding sulfuric acid into the lithium hydroxide separation mother liquor for acidification; s2, heating the mother liquor obtained by acidification in the step S1, and supplementing sodium sulfate; s3, freezing and crystallizing the mother liquor obtained in the step S2, and filtering and separating solids and a sodium precipitation solution; and S4, returning the obtained sodium precipitation solution to a lithium hydroxide production system. The method is suitable for a low-cost and short-process potassium removal process for lithium hydroxide production, the potassium removal rate is greater than or equal to 50%, and the potassium content in a lithium hydroxide system can be effectively reduced.
本发明提供一种氢氧化锂生产母液除钾的方法。方法包括以下步骤：步骤S1：氢氧化锂分离母液加入硫酸酸化；步骤S2：加热所述步骤S1酸化所得母液后，补加硫酸钠；步骤S3：将所述步骤S2所得母液冷冻析晶，过滤分离固体和析钠溶液；步骤S4：所得析钠溶液返回氢氧化锂生产系统。本发明适合氢氧化锂生产的低成本、短流程除钾工艺，除钾率≥50%</description><subject>CHEMISTRY</subject><subject>COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZAjwTS3JyE9RSMsvUihKzc0vy8xLVyjIL0ksLs4szVVIK8rPVcjNL8lILVLIySwsBarKzAOySjJAshmVKUX5FZkpqQoFRfkppcklmfl5PAysaYk5xam8UJqbQdHNNcTZQze1ID8-tbggMTk1L7Uk3tnP0NDU3MTE0tjS0ZgYNQAAjThK</recordid><startdate>20230307</startdate><enddate>20230307</enddate><creator>FU XIAOYAN</creator><creator>LUO FUJUN</creator><creator>WEI DIANPING</creator><creator>LI LIANGBIN</creator><creator>AI GANGHUA</creator><creator>WANG BIN</creator><creator>XIAO JIAO</creator><creator>LIU SHUQI</creator><creator>LIU DEQIANG</creator><creator>JIANG HONGYAN</creator><creator>LI QIANG</creator><creator>PENG YANLI</creator><creator>LI QIAN</creator><scope>EVB</scope></search><sort><creationdate>20230307</creationdate><title>Method for removing potassium from mother liquor in lithium hydroxide production</title><author>FU XIAOYAN ; LUO FUJUN ; WEI DIANPING ; LI LIANGBIN ; AI GANGHUA ; WANG BIN ; XIAO JIAO ; LIU SHUQI ; LIU DEQIANG ; JIANG HONGYAN ; LI QIANG ; PENG YANLI ; LI QIAN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN115744939A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2023</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><toplevel>online_resources</toplevel><creatorcontrib>FU XIAOYAN</creatorcontrib><creatorcontrib>LUO FUJUN</creatorcontrib><creatorcontrib>WEI DIANPING</creatorcontrib><creatorcontrib>LI LIANGBIN</creatorcontrib><creatorcontrib>AI GANGHUA</creatorcontrib><creatorcontrib>WANG BIN</creatorcontrib><creatorcontrib>XIAO JIAO</creatorcontrib><creatorcontrib>LIU SHUQI</creatorcontrib><creatorcontrib>LIU DEQIANG</creatorcontrib><creatorcontrib>JIANG HONGYAN</creatorcontrib><creatorcontrib>LI QIANG</creatorcontrib><creatorcontrib>PENG YANLI</creatorcontrib><creatorcontrib>LI QIAN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>FU XIAOYAN</au><au>LUO FUJUN</au><au>WEI DIANPING</au><au>LI LIANGBIN</au><au>AI GANGHUA</au><au>WANG BIN</au><au>XIAO JIAO</au><au>LIU SHUQI</au><au>LIU DEQIANG</au><au>JIANG HONGYAN</au><au>LI QIANG</au><au>PENG YANLI</au><au>LI QIAN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for removing potassium from mother liquor in lithium hydroxide production</title><date>2023-03-07</date><risdate>2023</risdate><abstract>The invention provides a method for removing potassium from mother liquor in lithium hydroxide production. The method comprises the following steps: S1, adding sulfuric acid into the lithium hydroxide separation mother liquor for acidification; s2, heating the mother liquor obtained by acidification in the step S1, and supplementing sodium sulfate; s3, freezing and crystallizing the mother liquor obtained in the step S2, and filtering and separating solids and a sodium precipitation solution; and S4, returning the obtained sodium precipitation solution to a lithium hydroxide production system. The method is suitable for a low-cost and short-process potassium removal process for lithium hydroxide production, the potassium removal rate is greater than or equal to 50%, and the potassium content in a lithium hydroxide system can be effectively reduced.
本发明提供一种氢氧化锂生产母液除钾的方法。方法包括以下步骤：步骤S1：氢氧化锂分离母液加入硫酸酸化；步骤S2：加热所述步骤S1酸化所得母液后，补加硫酸钠；步骤S3：将所述步骤S2所得母液冷冻析晶，过滤分离固体和析钠溶液；步骤S4：所得析钠溶液返回氢氧化锂生产系统。本发明适合氢氧化锂生产的低成本、短流程除钾工艺，除钾率≥50%</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY |
| title | Method for removing potassium from mother liquor in lithium hydroxide production |
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