JP2017137221A5 - - Google Patents

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JP2017137221A5
JP2017137221A5 JP2016019945A JP2016019945A JP2017137221A5 JP 2017137221 A5 JP2017137221 A5 JP 2017137221A5 JP 2016019945 A JP2016019945 A JP 2016019945A JP 2016019945 A JP2016019945 A JP 2016019945A JP 2017137221 A5 JP2017137221 A5 JP 2017137221A5
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acid
hydrofluoric acid
nitric acid
hydrofluoric
alkali
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JP2016019945A
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JP2017137221A (en
JP6728731B2 (en
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ケイフッ化水素酸を含むフッ硝酸水溶液と硝酸塩とを接触させ、ケイフッ化水素酸塩を析出させ、固液分離にて該ケイフッ化水素酸塩を分離・除去する、ケイフッ化水素酸の除去方法。A method for removing silicohydrofluoric acid, comprising bringing hydrofluoric acid aqueous solution containing hydrofluoric acid into contact with nitrate, precipitating silicohydrofluoride, and separating and removing the hydrosilicofluoride by solid-liquid separation. ケイフッ化水素酸を含むフッ硝酸水溶液と硝酸塩とを接触させ、ケイフッ化水素酸塩を析出させ、固液分離にて該ケイフッ化水素酸塩を分離する工程を含む、フッ化水素酸と硝酸の混合物の製造方法。A step of bringing hydrofluoric acid aqueous solution containing silicofluoric acid into contact with nitrate, precipitating silicohydrofluoride, and separating the silicohydrofluoride by solid-liquid separation; A method for producing a mixture. フッ化水素酸と硝酸の混合物を蒸留塔に供給し、硫酸の存在下でフッ化水素酸と硝酸とを分離し、それぞれ回収する、フッ化水素酸と硝酸の回収方法。A method for recovering hydrofluoric acid and nitric acid, wherein a mixture of hydrofluoric acid and nitric acid is supplied to a distillation column, and hydrofluoric acid and nitric acid are separated and recovered in the presence of sulfuric acid. フッ化水素酸と硝酸の混合物を蒸留塔に供給し、硫酸の存在下でフッ化水素酸と硝酸とを分離する工程を含む、フッ化水素酸の製造方法。A method for producing hydrofluoric acid, comprising a step of supplying a mixture of hydrofluoric acid and nitric acid to a distillation column and separating hydrofluoric acid and nitric acid in the presence of sulfuric acid. フッ化水素酸と硝酸の混合物を蒸留塔に供給し、硫酸の存在下でフッ化水素酸と硝酸とを分離する工程を含む、硝酸の製造方法。A method for producing nitric acid, comprising a step of supplying a mixture of hydrofluoric acid and nitric acid to a distillation column and separating hydrofluoric acid and nitric acid in the presence of sulfuric acid. ケイフッ化水素酸を含むフッ硝酸水溶液と硝酸塩とを接触させ、ケイフッ化水素酸塩を析出させ、固液分離にて該ケイフッ化水素酸塩を分離し、得られる残液を蒸留塔に供給し、硫酸の存在下でフッ化水素酸と硝酸とを分離し、それぞれ回収する、フッ化水素酸と硝酸の回収方法。A hydrofluoric acid aqueous solution containing silicohydrofluoric acid is brought into contact with nitrate to precipitate hydrosilicofluoride, and the hydrofluoric acid salt is separated by solid-liquid separation, and the resulting residual liquid is supplied to a distillation column. A method for recovering hydrofluoric acid and nitric acid, in which hydrofluoric acid and nitric acid are separated and recovered in the presence of sulfuric acid. 更に、前記ケイフッ化水素酸塩をアルカリと接触させ、シリカとフッ化水素酸塩に分離する工程を含む、請求項１、２又は６に記載の方法。Furthermore, the method of Claim 1, 2 or 6 including the process which makes the said silicofluoride contact with an alkali and isolate | separates into a silica and a hydrofluoride. 前記アルカリが、アルカリ炭酸塩又はアルカリ水酸化物である、請求項７に記載の方法。The method according to claim 7, wherein the alkali is an alkali carbonate or an alkali hydroxide. 前記アルカリ炭酸塩が炭酸カリウム又は炭酸ナトリウムであり、前記アルカリ水酸化物が水酸化カリウム又は水酸化ナトリウムである、請求項８に記載の方法。The method according to claim 8, wherein the alkali carbonate is potassium carbonate or sodium carbonate, and the alkali hydroxide is potassium hydroxide or sodium hydroxide.
JP2016019945A 2016-02-04 2016-02-04 Method for recovering hydrofluoric acid and nitric acid Active JP6728731B2 (en)

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JP2016019945A JP6728731B2 (en) 2016-02-04 2016-02-04 Method for recovering hydrofluoric acid and nitric acid

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JP2016019945A JP6728731B2 (en) 2016-02-04 2016-02-04 Method for recovering hydrofluoric acid and nitric acid

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JP2020072895A Division JP2020121310A (en) 2020-04-15 2020-04-15 Recovery method of hydrofluoric acid and nitric acid

Publications (3)

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JP2017137221A JP2017137221A (en) 2017-08-10
JP2017137221A5 true JP2017137221A5 (en) 2019-02-21
JP6728731B2 JP6728731B2 (en) 2020-07-22

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111232927A (en) * 2020-03-09 2020-06-05 广东水清环保科技有限公司 Waste acid recovery method and system
CN112357926A (en) * 2020-11-03 2021-02-12 陕西中环信环保科技有限公司 Device and method for preparing potassium fluosilicate and nitric acid by using fluorine-containing nitric acid etching solution
CN116425168A (en) * 2023-05-31 2023-07-14 云南云天化股份有限公司 Method for preparing potassium fluosilicate and calcium fluoride by utilizing photovoltaic fluorine-containing waste acid
CN117699742A (en) * 2024-02-05 2024-03-15 上海联风气体有限公司 Hydrofluoric acid regeneration method for photovoltaic waste acid

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