Industrial method for producing silicon-free hydrogen fluoride
The invention provides an industrial method for producing silicon-free hydrogen fluoride, which includes the following steps: (A) placing aluminum in a first reactor and increasing the temperature to 700-1050 DEG C, adding one or a mixture of more than one of potassium fluotitanate, potassium fluobo...
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| creator | ZHOU ZHI CHEN XUEMIN ZHONG SHENGXIAN ZENG QINGQUAN LI SHUIBING |
| description | The invention provides an industrial method for producing silicon-free hydrogen fluoride, which includes the following steps: (A) placing aluminum in a first reactor and increasing the temperature to 700-1050 DEG C, adding one or a mixture of more than one of potassium fluotitanate, potassium fluoborate and potassium fluozirconate to the first reactor, stirring the components for 0.5-4 h, allowing the components to stand for 2-4 h and withdrawing a molten liquid on the upper layer to obtain potassium cryolite; (B) according to ratio, adding a certain amount of concentrated sulfuric acid in a second reactor, and adding the potassium cryolite to the second reactor, stirring the components for 0.5-3 h, and controlling reaction temperature to be 200-300 DEG C, allowing the components to stand for 3-4 h, and collecting escaped gas to obtain the silicon-free hydrogen fluoride. In the method, firstly the potassium cryolite is prepared through special steps and then is reacted wit the concentrated sulfuric acid to ob |
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In the method, firstly the potassium cryolite is prepared through special steps and then is reacted wit the concentrated sulfuric acid to ob</description><language>chi ; eng</language><subject>CHEMISTRY ; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS ; COMPOUNDS THEREOF ; INORGANIC CHEMISTRY ; METALLURGY ; NON-METALLIC ELEMENTS</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=20170915&DB=EPODOC&CC=CN&NR=107161952A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170915&DB=EPODOC&CC=CN&NR=107161952A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ZHOU ZHI</creatorcontrib><creatorcontrib>CHEN XUEMIN</creatorcontrib><creatorcontrib>ZHONG SHENGXIAN</creatorcontrib><creatorcontrib>ZENG QINGQUAN</creatorcontrib><creatorcontrib>LI SHUIBING</creatorcontrib><title>Industrial method for producing silicon-free hydrogen fluoride</title><description>The invention provides an industrial method for producing silicon-free hydrogen fluoride, which includes the following steps: (A) placing aluminum in a first reactor and increasing the temperature to 700-1050 DEG C, adding one or a mixture of more than one of potassium fluotitanate, potassium fluoborate and potassium fluozirconate to the first reactor, stirring the components for 0.5-4 h, allowing the components to stand for 2-4 h and withdrawing a molten liquid on the upper layer to obtain potassium cryolite; (B) according to ratio, adding a certain amount of concentrated sulfuric acid in a second reactor, and adding the potassium cryolite to the second reactor, stirring the components for 0.5-3 h, and controlling reaction temperature to be 200-300 DEG C, allowing the components to stand for 3-4 h, and collecting escaped gas to obtain the silicon-free hydrogen fluoride. 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In the method, firstly the potassium cryolite is prepared through special steps and then is reacted wit the concentrated sulfuric acid to ob</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS |
| title | Industrial method for producing silicon-free hydrogen fluoride |
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