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JPS5622627A - Purifying method for fluorine impurity-containing sodium sulfate - Google Patents

Purifying method for fluorine impurity-containing sodium sulfate

Info

Publication number
JPS5622627A
JPS5622627A JP9494279A JP9494279A JPS5622627A JP S5622627 A JPS5622627 A JP S5622627A JP 9494279 A JP9494279 A JP 9494279A JP 9494279 A JP9494279 A JP 9494279A JP S5622627 A JPS5622627 A JP S5622627A
Authority
JP
Japan
Prior art keywords
soln
sodium sulfate
impurity
containing sodium
nahso
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
JP9494279A
Other languages
Japanese (ja)
Other versions
JPS62847B2 (en
Inventor
Nobuo Takahashi
Yuzo Fukuoka
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.)
Sumitomo Metal Mining Co Ltd
Original Assignee
Sumitomo Metal 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 Sumitomo Metal Mining Co Ltd filed Critical Sumitomo Metal Mining Co Ltd
Priority to JP9494279A priority Critical patent/JPS5622627A/en
Publication of JPS5622627A publication Critical patent/JPS5622627A/en
Publication of JPS62847B2 publication Critical patent/JPS62847B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain Na2SO4 crystals of a low F content by adding an Al compound to an aqueous Na2SO4 soln. of a specified concn. contg. F as impurity, adjusting the soln. to a specified pH, and precipitating F as Na3AlF6.
CONSTITUTION: One or more among Na2SO4, NaHSO3,Na2SO3NaHSO4 or NaHSO4 each contg. F as impurity are dissolced in water so that the concn. becomes ≥50g/l as Na2SO4. An Al compound such as Al2(SO4)3 or Al(OH)3 is added to the aqueous soln., and the soln. is kept at ≤65°C, adjusted to 5.5W9pH with alkali, and optionally subjected to oxidation treatment by blowing air or the like, precipitating F as Na3AlF6. This precipitate is removed by filtration, and the filtrate is concentrated to obtain Na2SO4 crystals.
COPYRIGHT: (C)1981,JPO&Japio
JP9494279A 1979-07-27 1979-07-27 Purifying method for fluorine impurity-containing sodium sulfate Granted JPS5622627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9494279A JPS5622627A (en) 1979-07-27 1979-07-27 Purifying method for fluorine impurity-containing sodium sulfate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9494279A JPS5622627A (en) 1979-07-27 1979-07-27 Purifying method for fluorine impurity-containing sodium sulfate

Publications (2)

Publication Number Publication Date
JPS5622627A true JPS5622627A (en) 1981-03-03
JPS62847B2 JPS62847B2 (en) 1987-01-09

Family

ID=14123994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9494279A Granted JPS5622627A (en) 1979-07-27 1979-07-27 Purifying method for fluorine impurity-containing sodium sulfate

Country Status (1)

Country Link
JP (1) JPS5622627A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016187779A (en) * 2015-03-30 2016-11-04 住友重機械エンバイロメント株式会社 Wastewater treatment equipment and wastewater treatment method
JP2019122961A (en) * 2019-04-26 2019-07-25 住友重機械エンバイロメント株式会社 Wastewater treatment equipment and wastewater treatment method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190159A (en) * 1975-02-05 1976-08-07 SANGYOHAISUICHUNOFUTSUSOOKOTEIJOKYOSURUHOHO OYOBI SOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190159A (en) * 1975-02-05 1976-08-07 SANGYOHAISUICHUNOFUTSUSOOKOTEIJOKYOSURUHOHO OYOBI SOCHI

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016187779A (en) * 2015-03-30 2016-11-04 住友重機械エンバイロメント株式会社 Wastewater treatment equipment and wastewater treatment method
JP2019122961A (en) * 2019-04-26 2019-07-25 住友重機械エンバイロメント株式会社 Wastewater treatment equipment and wastewater treatment method

Also Published As

Publication number Publication date
JPS62847B2 (en) 1987-01-09

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