JP2004074041A5 - - Google Patents

Download PDF

Info

Publication number
JP2004074041A5
JP2004074041A5 JP2002239217A JP2002239217A JP2004074041A5 JP 2004074041 A5 JP2004074041 A5 JP 2004074041A5 JP 2002239217 A JP2002239217 A JP 2002239217A JP 2002239217 A JP2002239217 A JP 2002239217A JP 2004074041 A5 JP2004074041 A5 JP 2004074041A5
Authority
JP
Japan
Prior art keywords
fluorine
recovering
water
calcium
agglomerate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002239217A
Other languages
Japanese (ja)
Other versions
JP2004074041A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP2002239217A priority Critical patent/JP2004074041A/en
Priority claimed from JP2002239217A external-priority patent/JP2004074041A/en
Priority to PCT/JP2003/010450 priority patent/WO2004018369A1/en
Priority to AU2003262247A priority patent/AU2003262247A1/en
Publication of JP2004074041A publication Critical patent/JP2004074041A/en
Publication of JP2004074041A5 publication Critical patent/JP2004074041A5/ja
Pending legal-status Critical Current

Links

Claims (5)

フッ素が溶解した水溶液と、粒径５〜５０μｍの硫酸カルシウム粒子とを混合して、フッ化カルシウムを生成させることにより、フッ素を回収することを特徴とするフッ素の回収方法。A method for recovering fluorine, comprising recovering fluorine by mixing an aqueous solution in which fluorine is dissolved with calcium sulfate particles having a particle diameter of 5 to 50 μm to generate calcium fluoride. 前記水溶液は、
タンタルのフッ化カリウム塩と還元剤とを希釈塩中に投入し、還元反応して反応融液を得て、該反応融液を冷却して集塊を得て、該集塊を水で洗浄して得られた第１廃水と、
水での洗浄の後に酸で洗浄して得られた第２廃水とを含有することを特徴とする請求項１に記載のフッ素の回収方法。 The aqueous solution is
A potassium fluoride salt of tantalum and a reducing agent are put into a diluted salt, a reduction reaction is performed to obtain a reaction melt, the reaction melt is cooled to obtain an agglomerate, and the agglomerate is washed with water And the first wastewater obtained
2. The method for recovering fluorine according to claim 1, comprising: second waste water obtained by washing with water after washing with water . 前記第１廃液中のフッ素濃度は１０〜３００ｐｐｍで、前記第２廃水中のフッ素濃度は１００〜２００００ｐｐｍであることを特徴とする請求項２に記載のフッ素の回収方法。 The fluorine concentration method according to claim 2, wherein the fluorine concentration in the first waste liquid is 10 to 300 ppm, and the fluorine concentration in the second waste water is 100 to 20000 ppm . 生成した前記フッ化カルシウムを、フィルタープレスで膜処理することを特徴とする請求項１ないし３のいずれかに記載のフッ素の回収方法。 4. The method for recovering fluorine according to claim 1, wherein the produced calcium fluoride is subjected to membrane treatment with a filter press . 前記フッ素のモル数（ＭＦ）と、前記硫酸カルシウムにおけるカルシウムのモル数（ＭＣａ）との比率ＭＣａ／２ＭＦが、１．２〜２．０の範囲であることを特徴とする請求項１ないし４のいずれかに記載のフッ素の回収方法。 Claims moles of the fluorine and (M F), the ratio M Ca / 2M F of the moles of calcium in the calcium sulfate (M Ca), characterized in that in the range of 1.2 to 2.0 Item 5. The method for recovering fluorine according to any one of Items 1 to 4 .
JP2002239217A 2002-08-20 2002-08-20 Recovering method of fluorine Pending JP2004074041A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002239217A JP2004074041A (en) 2002-08-20 2002-08-20 Recovering method of fluorine
PCT/JP2003/010450 WO2004018369A1 (en) 2002-08-20 2003-08-19 Method of recovering fluorine
AU2003262247A AU2003262247A1 (en) 2002-08-20 2003-08-19 Method of recovering fluorine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002239217A JP2004074041A (en) 2002-08-20 2002-08-20 Recovering method of fluorine

Publications (2)

Publication Number Publication Date
JP2004074041A JP2004074041A (en) 2004-03-11
JP2004074041A5 true JP2004074041A5 (en) 2005-10-13

Family

ID=31943857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002239217A Pending JP2004074041A (en) 2002-08-20 2002-08-20 Recovering method of fluorine

Country Status (3)

Country Link
JP (1) JP2004074041A (en)
AU (1) AU2003262247A1 (en)
WO (1) WO2004018369A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4368249B2 (en) * 2004-06-01 2009-11-18 三洋電機株式会社 Treatment apparatus and treatment method of water to be treated using the same
JP4747587B2 (en) * 2005-01-27 2011-08-17 株式会社ニコン Method for producing calcium fluoride sintered body
JP4953586B2 (en) * 2005-04-14 2012-06-13 キャボットスーパーメタル株式会社 Fluorine recovery method
JP4591452B2 (en) * 2007-01-16 2010-12-01 パナソニック株式会社 Method and apparatus for treating fluorine-containing water
JP5440095B2 (en) * 2009-10-22 2014-03-12 栗田工業株式会社 Method and apparatus for treating fluorine-containing water
JP2013188673A (en) * 2012-03-13 2013-09-26 Toshiba Corp Fluorine recovery device, fluorine recovery system, and fluorine recovery method
JP5502924B2 (en) * 2012-03-30 2014-05-28 株式会社東芝 Water treatment method
JP2013220956A (en) * 2012-04-13 2013-10-28 Central Glass Co Ltd Method and apparatus for producing calcium fluoride
JP2013220955A (en) * 2012-04-13 2013-10-28 Central Glass Co Ltd Method and apparatus for producing calcium fluoride
JP2014133188A (en) * 2013-01-08 2014-07-24 Toshiba Corp Water treatment method and water treatment apparatus
CN105008357A (en) * 2013-02-21 2015-10-28 辉瑞大药厂 Solid forms of a selective CDK4/6 inhibitor
US10136709B2 (en) 2013-09-06 2018-11-27 Oliver Joen-An Ma Cantilever umbrella
JP5649749B2 (en) * 2014-01-31 2015-01-07 株式会社東芝 Water treatment method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49122880A (en) * 1973-03-28 1974-11-25
US5362461A (en) * 1991-10-03 1994-11-08 Kurita Water Industries, Ltd. Method for recovering calcium fluoride from fluoroetchant
JP2001137864A (en) * 1999-11-10 2001-05-22 Daikin Ind Ltd Method for treating waste water containing hydrofluoric acid

Similar Documents

Publication Publication Date Title
JP2004074041A5 (en)
Shao et al. An all-in-one strategy for the adsorption of heavy metal ions and photodegradation of organic pollutants using steel slag-derived calcium silicate hydrate
Saleh et al. Removal of poly-and per-fluoroalkyl substances from aqueous systems by nano-enabled water treatment strategies
Espana et al. Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA): A critical review with an emphasis on field testing
CN102133505B (en) Enhanced cleaning method for reverse osmosis/nanofiltration membrane pollution
CN109261133A (en) A kind of ferromagnetism composite balls and its application being easily recycled
JP2008532743A5 (en)
CN107365005B (en) A kind of processing method of the fluorine-containing nitrogen-containing wastewater of nitric acid type
CA2687740A1 (en) Improved water treatment method
JP5527473B2 (en) Membrane treatment method for formaldehyde-containing wastewater
CN106345466A (en) Method for preparing hydroxylation graphene oxide-magnesium titanate/silver molybdate composite materials
JP6676037B2 (en) In situ regeneration method of activated carbon loaded with trihalomethane by alkaline hydrolysis
CN104829008A (en) Water treatment method for removing ammonia nitrogen
WO2015158239A1 (en) Fume desulfurization and denitrification method
JP2013193939A (en) Method of producing ferric nitrate aqueous solution and sodium nitrite
CN107175066A (en) A kind of preparation method of complex mineral demercuration adsorbent for PVC production wastewater treatments
CN101538077A (en) Method for electrolytic activation of particle electrodes for three-dimensional electrode reactor
CN106044920A (en) Network-structure graphene micro-sheet and preparation method thereof
Kostić et al. Effects of power of ultrasound on removal of Cu (II) ions by xanthated Lagenaria vulgaris shell
CN111762864A (en) Decyanation treatment method for cyanogen-containing material
RU2009145819A (en) METHOD FOR PRODUCING BIOCIDE
CN102897883B (en) Preparation method for humic acid degradable material Ag-TiO2
Guo et al. Facile synthesis of NH2-UiO-66 modified low-cost loofah sponge for the adsorption of fluoride from water
CN104909425B (en) Method used for treating high concentration ammonia nitrogen in metallurgical waste water
CN103521078A (en) Preparation method of membrane element of reverse osmosis membrane capable of quickly improving flux