发明名称 |
MANUFACTURE METHOD OF SYNTHETIC FLUORITE, AND MANUFACTURING APPARATUS FOR SYNTHETIC FLUORITE |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a manufacturing method of synthetic fluorite which can be suitably used for removing fluorine from a gas containing fluorine such as an exhaust gas generated in a process for manufacturing tricalcium phosphate by thermal decomposition of rock phosphate and also for producing a product (synthetic fluorite) high in the content of calcium fluoride from the above fluorine. <P>SOLUTION: The manufacturing method of synthetic fluorite includes a calcium fluoride recovery process for producing a mixture containing calcium fluoride and calcium hydroxide by reacting the fluorine in the gas containing fluorine with calcium hydroxide of a quantity exceeding the stoichiometric quantity to fluorine, a hydrogen fluoride recovery process of producing a hydrogen fluoride aqueous solution by bringing a gas containing fluorine into contact with water, and a re-reaction process of reacting the mixture formed in the hydrogen fluoride recovery process with the hydrogen fluoride aqueous solution formed in the hydrogen fluoride recovery process. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
申请公布号 |
JP2008162859(A) |
申请公布日期 |
2008.07.17 |
申请号 |
JP20060355565 |
申请日期 |
2006.12.28 |
申请人 |
TOYO DENKA KOGYO CO LTD |
发明人 |
SHIGEI MIKIO;YAMAZAKI TOMIO;KONUMA TOMOYUKI |
分类号 |
C01F11/22;B01D53/34;B01D53/68;B01D53/77 |
主分类号 |
C01F11/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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