JPS577812A - Removing method for fluorine from waste sulfuric acid - Google Patents

Removing method for fluorine from waste sulfuric acid

Info

Publication number
JPS577812A
JPS577812A JP7895080A JP7895080A JPS577812A JP S577812 A JPS577812 A JP S577812A JP 7895080 A JP7895080 A JP 7895080A JP 7895080 A JP7895080 A JP 7895080A JP S577812 A JPS577812 A JP S577812A
Authority
JP
Japan
Prior art keywords
contg
sif
gypsum
sulfuric acid
casif
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.)
Granted
Application number
JP7895080A
Other languages
Japanese (ja)
Other versions
JPS5934644B2 (en
Inventor
Suguru Hirabayashi
Koujirou Tazuruhama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
Nippon Mining Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Mining Co Ltd filed Critical Nippon Mining Co Ltd
Priority to JP7895080A priority Critical patent/JPS5934644B2/en
Publication of JPS577812A publication Critical patent/JPS577812A/en
Publication of JPS5934644B2 publication Critical patent/JPS5934644B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Removal Of Specific Substances (AREA)
  • Silicon Compounds (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: To efficiently separate CaSiF6 from the resulting gypsum by adding SiO2 to waste sulfuric acid to convert contained F into H2SiF6 and further adding a Ca- contg. alkali agent to convert the H2SiF6 into CaSiF6.
CONSTITUTION: By sulfurization or other method As is removed from waste sulfuric acid discharged from a process of scrubbing gaseous SO2 and contg. 3W10g/l F as well as 100W300g/l sulfuric acid in general. By adding a substance contg. an SiO2 source such as silica to the As-free waste acid, the contained F is converted into H2SiF6, and the waste acid is fed to a process of manufacturing gypsum. In the process a Ca-contg. alkali agent such as CaCO3 is added to form CaSiF6 with high solubility as well as to deposit gypsum. The deposited gypsum is settled, separated, centrifugally separated, and recovered as product gypsum contg. no F. On the other hand, by adding an Na-contg. additive, H2SiF6 in the filtrate is converted into Na2SiF6, which is then separated and recovered as crystals.
COPYRIGHT: (C)1982,JPO&Japio
JP7895080A 1980-06-13 1980-06-13 Fluorine removal method from waste sulfuric acid Expired JPS5934644B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7895080A JPS5934644B2 (en) 1980-06-13 1980-06-13 Fluorine removal method from waste sulfuric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7895080A JPS5934644B2 (en) 1980-06-13 1980-06-13 Fluorine removal method from waste sulfuric acid

Publications (2)

Publication Number Publication Date
JPS577812A true JPS577812A (en) 1982-01-16
JPS5934644B2 JPS5934644B2 (en) 1984-08-23

Family

ID=13676159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7895080A Expired JPS5934644B2 (en) 1980-06-13 1980-06-13 Fluorine removal method from waste sulfuric acid

Country Status (1)

Country Link
JP (1) JPS5934644B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011092929A (en) * 2009-10-01 2011-05-12 Rematec Corp Treatment method for mixed acid waste liquid
JP2011162388A (en) * 2010-02-09 2011-08-25 Morita Kagaku Kogyo Kk Method for producing alkali metal silicofluoride and nitric acid from waste liquid
CN105036404A (en) * 2015-06-30 2015-11-11 田辉明 Zero discharge treatment method for acid wastewater generated by acid pickling and purification of quartz sand powder or feldspar sand powder
JP2017043503A (en) * 2015-08-25 2017-03-02 住友大阪セメント株式会社 Method of producing gypsum and method of producing cement composition
JP2018131355A (en) * 2017-02-15 2018-08-23 住友大阪セメント株式会社 Method for manufacturing gypsum and method for manufacturing cement composition
JP2018168024A (en) * 2017-03-30 2018-11-01 住友大阪セメント株式会社 Production method of plaster, and production method of cement composition
CN110980739A (en) * 2019-11-06 2020-04-10 浙江海河环境科技有限公司 Method for recycling high-purity product from pickling waste liquid step by step
CN111732105A (en) * 2020-07-24 2020-10-02 昆明合起工贸有限公司 Calcium fluosilicate production process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6986226B2 (en) 2017-12-27 2021-12-22 三菱マテリアル株式会社 Wastewater treatment method
JP6970917B2 (en) 2017-12-27 2021-11-24 三菱マテリアル株式会社 Wastewater treatment method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011092929A (en) * 2009-10-01 2011-05-12 Rematec Corp Treatment method for mixed acid waste liquid
JP2011162388A (en) * 2010-02-09 2011-08-25 Morita Kagaku Kogyo Kk Method for producing alkali metal silicofluoride and nitric acid from waste liquid
CN105036404A (en) * 2015-06-30 2015-11-11 田辉明 Zero discharge treatment method for acid wastewater generated by acid pickling and purification of quartz sand powder or feldspar sand powder
JP2017043503A (en) * 2015-08-25 2017-03-02 住友大阪セメント株式会社 Method of producing gypsum and method of producing cement composition
JP2018131355A (en) * 2017-02-15 2018-08-23 住友大阪セメント株式会社 Method for manufacturing gypsum and method for manufacturing cement composition
JP2018168024A (en) * 2017-03-30 2018-11-01 住友大阪セメント株式会社 Production method of plaster, and production method of cement composition
CN110980739A (en) * 2019-11-06 2020-04-10 浙江海河环境科技有限公司 Method for recycling high-purity product from pickling waste liquid step by step
CN111732105A (en) * 2020-07-24 2020-10-02 昆明合起工贸有限公司 Calcium fluosilicate production process

Also Published As

Publication number Publication date
JPS5934644B2 (en) 1984-08-23

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