JP2006076811A - フッ酸の回収方法 - Google Patents
フッ酸の回収方法 Download PDFInfo
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- JP2006076811A JP2006076811A JP2004260516A JP2004260516A JP2006076811A JP 2006076811 A JP2006076811 A JP 2006076811A JP 2004260516 A JP2004260516 A JP 2004260516A JP 2004260516 A JP2004260516 A JP 2004260516A JP 2006076811 A JP2006076811 A JP 2006076811A
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- hydrofluoric acid
- distillation
- crude
- waste liquid
- concentrated
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Abstract
【解決手段】 フッ酸の回収方法は、金属成分含有のフッ酸廃液から蒸留法によりフッ酸を回収するフッ酸の回収方法であり、蒸発釜(1)にフッ酸廃液を供給して加熱し、蒸気として粗フッ酸を回収すると共に濃縮廃液を分離する粗フッ酸蒸発工程と、第1の蒸留塔(21)で粗フッ酸を蒸留し、濃縮フッ酸と回収水とに分離する第1蒸留工程と、第2の蒸留塔(22)で濃縮フッ酸を更に蒸留し、精製された精製フッ酸と廃液とに分離する第2蒸留工程とを備えている。そして、粗フッ酸蒸発工程のフッ酸廃液に金属成分の析出を抑制するに足る量の硫酸を添加する。
【選択図】 図1
Description
11:ジャケット
12:チューブ式熱交換器
13:コイル式熱交換器
14:水蒸気供給管
15:水蒸気排出管
21:第1の蒸留塔
22:第2の蒸留塔
41:回収水容器
42:精製フッ酸容器
51:リボイラー
52:リボイラー
61:冷却凝縮器
62:冷却凝縮器
71:原料流路
72:硫酸供給流路
73:粗フッ酸流路
74:廃液抜出し流路
81:塔底液抜出し流路
82:循環流路
83:濃縮フッ酸流路
84:蒸気流路
85:凝縮液流路
86:還流流路
87:回収水取出流路
89:排気流路
91:塔底液抜出し流路
92:循環流路
93:塔底液返流流路
94:蒸気流路
95:凝縮液流路
96:還流流路
97:精製フッ酸取出流路
Claims (2)
- 金属成分含有のフッ酸廃液から蒸留法によりフッ酸を回収するフッ酸の回収方法であって、蒸発釜にフッ酸廃液を一定流量で供給して加熱し、蒸気として粗フッ酸を回収すると共に濃縮廃液を分離する粗フッ酸蒸発工程と、第1の蒸留塔で粗フッ酸を蒸留し、粗フッ酸よりも高濃度の濃縮フッ酸と回収水とに分離する第1蒸留工程と、第2の蒸留塔で濃縮フッ酸を更に蒸留し、精製された精製フッ酸と廃液とに分離する第2蒸留工程とを備え、前記粗フッ酸蒸発工程のフッ酸廃液に金属成分の析出を抑制するに足る量の硫酸を添加することを特徴とするフッ酸の回収方法。
- 第2蒸留工程で得られた精製フッ酸を第1蒸留工程で得られた回収水によって所定濃度に希釈する請求項1に記載のフッ酸の回収方法。
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JP2004260516A JP4635527B2 (ja) | 2004-09-08 | 2004-09-08 | フッ酸の回収方法 |
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JP2004260516A JP4635527B2 (ja) | 2004-09-08 | 2004-09-08 | フッ酸の回収方法 |
Publications (2)
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JP2006076811A true JP2006076811A (ja) | 2006-03-23 |
JP4635527B2 JP4635527B2 (ja) | 2011-02-23 |
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JP2004260516A Active JP4635527B2 (ja) | 2004-09-08 | 2004-09-08 | フッ酸の回収方法 |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008189484A (ja) * | 2007-02-01 | 2008-08-21 | Morita Kagaku Kogyo Kk | フッ化水素酸およびケイフッ化水素酸を含有する廃液から酸成分を分離・回収する方法およびその装置 |
JP2008189483A (ja) * | 2007-02-01 | 2008-08-21 | Morita Kagaku Kogyo Kk | フッ化水素酸、塩酸およびケイフッ化水素酸を含有する廃液から酸成分を分離・回収する方法およびその装置 |
WO2009110549A1 (ja) * | 2008-03-07 | 2009-09-11 | 三井・デュポンフロロケミカル株式会社 | 電子部品の洗浄方法および洗浄システム |
WO2009110548A1 (ja) * | 2008-03-07 | 2009-09-11 | 三井・デュポンフロロケミカル株式会社 | 電子部品の洗浄方法および洗浄システム |
JP2012201554A (ja) * | 2011-03-25 | 2012-10-22 | Seiko Epson Corp | 分離方法および分離装置 |
JP2013226480A (ja) * | 2012-04-24 | 2013-11-07 | Kimura Chem Plants Co Ltd | 酸含有水溶液の蒸発濃縮装置および蒸発濃縮方法 |
TWI513504B (zh) * | 2012-09-19 | 2015-12-21 | Beijing Sevenstar Electronics Co Ltd | 化學液混合裝置及方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS634637B2 (ja) * | 1983-01-25 | 1988-01-29 | Outokumpu Oy | |
JP2003146619A (ja) * | 2001-11-12 | 2003-05-21 | Air Liquide Japan Ltd | フッ化水素の回収方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6191003A (ja) * | 1984-10-06 | 1986-05-09 | Tokuyama Soda Co Ltd | 弗酸の回収方法 |
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2004
- 2004-09-08 JP JP2004260516A patent/JP4635527B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS634637B2 (ja) * | 1983-01-25 | 1988-01-29 | Outokumpu Oy | |
JP2003146619A (ja) * | 2001-11-12 | 2003-05-21 | Air Liquide Japan Ltd | フッ化水素の回収方法 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008189484A (ja) * | 2007-02-01 | 2008-08-21 | Morita Kagaku Kogyo Kk | フッ化水素酸およびケイフッ化水素酸を含有する廃液から酸成分を分離・回収する方法およびその装置 |
JP2008189483A (ja) * | 2007-02-01 | 2008-08-21 | Morita Kagaku Kogyo Kk | フッ化水素酸、塩酸およびケイフッ化水素酸を含有する廃液から酸成分を分離・回収する方法およびその装置 |
WO2009110549A1 (ja) * | 2008-03-07 | 2009-09-11 | 三井・デュポンフロロケミカル株式会社 | 電子部品の洗浄方法および洗浄システム |
WO2009110548A1 (ja) * | 2008-03-07 | 2009-09-11 | 三井・デュポンフロロケミカル株式会社 | 電子部品の洗浄方法および洗浄システム |
JPWO2009110548A1 (ja) * | 2008-03-07 | 2011-07-14 | 三井・デュポンフロロケミカル株式会社 | 電子部品の洗浄方法および洗浄システム |
JP2012201554A (ja) * | 2011-03-25 | 2012-10-22 | Seiko Epson Corp | 分離方法および分離装置 |
JP2013226480A (ja) * | 2012-04-24 | 2013-11-07 | Kimura Chem Plants Co Ltd | 酸含有水溶液の蒸発濃縮装置および蒸発濃縮方法 |
TWI513504B (zh) * | 2012-09-19 | 2015-12-21 | Beijing Sevenstar Electronics Co Ltd | 化學液混合裝置及方法 |
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